2026/06/04 更新

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写真a

フジワラ コウタ
藤原 康太
FUJIWARA KOHTA
所属
九州大学病院 眼科 助教
医学部 医学科(併任)
職名
助教
連絡先
メールアドレス
電話番号
0926425648
外部リンク

学位

  • 博士

研究テーマ・研究キーワード

  • 研究テーマ: 前視野緑内障の予防法構築に向けた疫学エビデンスの確立

    研究キーワード: 眼科疫学、緑内障

    研究期間: 2021年4月 - 2023年3月

受賞

  • 日本眼科学会学術奨励賞

    2020年4月  

論文

  • A genome-wide association between foveal thickness and arrhythmia 査読

    Nakao, SY; Miyake, M; Fujiwara, K; Nakano, E; Mori, Y; Morino, K; Hosoda, Y; Nakayama, T; Sekine, A; Kosugi, S; Tabara, Y; Akiyama, M; Yamashiro, K; Tamura, H; Hata, J; Ninomiya, T; Matsuda, F; Sonoda, KH; Tsujikawa, A

    COMMUNICATIONS MEDICINE   5 ( 1 )   374   2025年8月   ISSN:2730-664X

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    記述言語:英語   出版者・発行元:Communications Medicine  

    Background: The fovea is one of the most crucial parts of the visual system and has a special structure. We aimed to identify susceptibility single nucleotide polymorphisms (SNPs) for foveal thickness in a large Japanese cohort. Methods: Genome-wide association study (GWAS) and replication studies were conducted in 9850 individuals from the Nagahama Study (from 2013 to 2016) and 935 individuals from the Hisayama Study. Genome-wide quantitative trait loci analyses and phenome-wide association study (PheWAS) were conducted using Biobank Japan Data for novel susceptibility SNPs. Finally, phenotypic associations were evaluated in the Nagahama Study. Results: Here we show that rs4903064, located in Double PHD Fingers 3 (DPF3), is genome-wide significantly associated with foveal thickness, which is confirmed by replication studies and meta-analysis (β = 2.18, standard error = 0.59, P = 2.93 × 10<sup>−13</sup>). PheWAS identifies that the SNP was phenome-wide significantly associated with arrhythmia (β = −0.049, SE = 0.012, P = 2.50 × 10<sup>−5</sup>). In the Nagahama Study, individuals with a thicker fovea have a significantly lower risk of premature atrial/ventricular contraction (odds ratio = 0.86, 95% confidence interval = 0.75 to 0.98, P-value = 0.022). Conclusions: We identify a novel foveal thickness susceptibility gene that is also associated with arrhythmia. Individuals with premature atrial/ventricular contraction may be advised to undergo ophthalmological evaluation as necessary.

    DOI: 10.1038/s43856-025-01087-z

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  • Association between corneal hysteresis and glaucoma in a Japanese population: the Hisayama Study 査読

    Fujiwara, K; Ueda, E; Hata, J; Nakano, S; Hashimoto, S; Nakamura, S; Murakami, Y; Kubota, T; Yoshitomi, T; Ninomiya, T; Sonoda, KH

    BRITISH JOURNAL OF OPHTHALMOLOGY   108 ( 9 )   1204 - 1209   2024年9月   ISSN:0007-1161 eISSN:1468-2079

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    担当区分:責任著者   記述言語:英語   出版者・発行元:British Journal of Ophthalmology  

    Aims To investigate the association between corneal hysteresis and the presence of glaucoma and its subtypes in a general Japanese population. Methods We analysed the data of 2338 Japanese community-dwellers aged ≥40 years (1059 men, 1279 women) who underwent an eye examination in 2018 as part of the population-based, cross-sectional Hisayama Study. Participants were divided into quartile levels of corneal hysteresis, which had been measured with an ocular response analyzer. Glaucoma was defined based on the International Society of Geographical and Epidemiological Ophthalmology criteria. We conducted a logistic regression analysis to determine the ORs and their 95% CIs for the presence of outcomes according to the corneal hysteresis quartiles. Results Glaucoma was diagnosed in 154 participants: primary open-angle glaucoma (POAG), n=115; primary angle-closure glaucoma, n=17; exfoliation glaucoma, n=21 and secondary glaucoma without exfoliation glaucoma, n=1. After adjustment for confounders, the OR for prevalent glaucoma was significantly increased in the participants in the first corneal-hysteresis quartile compared with those in the fourth quartile (OR: 1.80; 95% CI: 1.03 to 3.17). Regarding glaucoma subtypes, the first-quartile participants had significantly greater likelihoods of the presence of POAG (OR: 1.63; 95% CI: 1.02 to 2.61) and exfoliation glaucoma (OR: 6.49; 95% CI: 1.44 to 29.30) compared with those in the third and fourth quartiles after adjustment for potential confounders. Conclusions These results demonstrated a significant inverse association between corneal hysteresis and the likelihood of glaucoma, suggesting that the measurement of corneal hysteresis would provide useful information for elucidating the aetiology of glaucoma.

    DOI: 10.1136/bjo-2023-323987

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  • 九州大学病院における緑内障手術の長期術後成績 査読

    木下 博之, 藤原 康太, 下川 翔太郎, 村上 祐介, 池田 康博, 園田 康平

    眼科臨床紀要   15 ( 12 )   799 - 805   2022年12月   ISSN:1882-5176

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    記述言語:日本語   出版者・発行元:眼科臨床紀要会  

    目的:九州大学病院における2007~2012年までの5年間の緑内障手術の術式別の成績,および5年生存率と関連する予後因子について検討した.対象:2007年1月~2012年12月にかけて施行され,12ヵ月以上経過観察可能であった原発開放隅角緑内障(POAG)と落屑緑内障(EXG)の115例153眼を対象とし,線維柱帯切開術(LOT)と線維柱帯切除術(LEC)の術後成績,合併症,予後因子を調査した.結果:対象者115名の平均年齢は70.5±10.1歳,男女の割合は97:56であった.眼圧21mmHg以下の5年生存率はLOT群88%,LEC群84%であった.術後成績の予後因子解析においてLOT群は水晶体再建術併施が有意な防御因子となり,LEC群は術前眼圧高値(30mmHg以上)が有意な危険因子となった.結論:LOT群は水晶体再建術併施で術後成績は良好,LEC群は術前眼圧が高値で術後成績不良であった.(著者抄録)

  • Prevalence of Glaucoma and Its Systemic Risk Factors in a General Japanese Population: The Hisayama Study 査読

    Fujiwara, K; Yasuda, M; Hata, J; Nakano, S; Hashimoto, S; Ueda, E; Nakamura, S; Murakami, Y; Nakamuro, T; Iwase, A; Araie, M; Tawara, A; Kubota, T; Yoshitomi, T; Ninomiya, T; Sonoda, KH

    TRANSLATIONAL VISION SCIENCE & TECHNOLOGY   11 ( 1 )   11   2022年1月   ISSN:2164-2591

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    担当区分:責任著者   記述言語:英語   出版者・発行元:Translational Vision Science and Technology  

    Purpose: To estimate the prevalence of glaucoma and its risk factors in a Japanese community. Methods: This study included 3405 Japanese community dwellers who were ≥40 years of age and enrolled in the Hisayama Study. This population-based, cross-sectional study was conducted from 2017 to 2018. A glaucoma screening test was performed using stereo fundus images and swept-source optical coherence tomography. Glaucoma was defined based on the International Society of Geographical and Epidemiological Ophthalmology criteria. Results: The prevalence of glaucoma was 7.6% (95% confidence interval [CI], 6.7–8.6) overall. The prevalence of primary open-angle glaucoma (POAG) was 5.8% (95% CI, 5.0– 6.6); that of primary angle-closure glaucoma (PACG) was 0.7% (95% CI, 0.5–1.1); and that of exfoliation glaucoma was 1.1% (95% CI, 0.7–1.4). In addition to aging, lower estimated glomerular filtration rate (eGFR) (odds ratio [OR] = 1.15; 95% CI, 1.02–1.33), higher intraocular pressure (OR = 1.06; 95% CI, 1.01–1.12), longer axial length (OR = 1.44; 95% CI, 1.31–1.59), and thinner central corneal thickness (CCT) (OR = 1.09; 95% CI, 1.04–1.15) were significant risk factors for POAG. Diabetes (OR = 2.81; 95% CI, 1.19– 6.62) was a significant risk factor for PACG, and diabetes (OR = 2.15; 95% CI, 1.03–4.47) and thinner CCT (OR = 1.14; 95% CI, 1.02–1.28) were significant risk factors for exfoliation glaucoma. Conclusions: The prevalence of glaucoma was approximately 8%, probably due to the increase in the Japanese aging population. Not only ocular factors but also lower eGFR for POAG and diabetes for PACG and exfoliation glaucoma were risk factors in a general Japanese population. Translational Relevance: Systemic factors such as eGFR and diabetes must also be considered when implementing preventive measures against glaucoma.

    DOI: 10.1167/tvst.11.11.11

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  • Baseline Relationships between Visual Function and Inflammatory Markers in the Registry of Moderated-Stage Retinitis Pigmentosa 査読

    Hisai, T; Shimokawa, S; Fukushima, M; Fujiwara, K; Koyanagi, Y; Hirata, A; Takada, A; Miyahara, F; Nakashima, N; Kobayakawa, Y; Mawatari, G; Ishizu, M; Toyama, N; Kaida, T; Miyata, K; Ikeda, Y; Sonoda, KH; Murakami, Y

    OPHTHALMOLOGY SCIENCE   6 ( 1 )   100930   2026年1月   ISSN:2666-9145

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    記述言語:英語   出版者・発行元:Ophthalmology Science  

    Purpose: To analyze the association between visual function and inflammatory markers in the baseline data of a prospective natural history registry of patients with typical retinitis pigmentosa (RP) (Retinitis Pigmentosa Progression and Inflammatory Marker Registry Study [RP-PRIMARY Study]). Design: A cross-sectional observational study using baseline data from the RP-PRIMARY study. Participants: A total of 67 patients with moderate-stage typical RP who were treated between October 2021 and October 2022 in 1 of 3 participating hospitals consented to participate and met the inclusion criteria. Methods: Visual functions were ETDRS best-corrected visual acuity (BCVA), Humphrey Field Analyzer 10-2 program (mean deviation value, and the mean sensitivity within the central 1° area [central 4 points, RS Cent 1’] and the 4° area [central 12 points, RS Cent 4’]), ellipsoid zone (EZ) length, central foveal thickness (CFT), hyper-autofluorescence (AF) ring area, and inflammatory markers were aqueous flare and blood test measurements. Main Outcome Measures: Association between visual function and inflammatory markers. Results: The median age of participants was 51 (interquartile range: 43–60) years. Spearman rank correlation coefficient demonstrated that aqueous flare values were negatively correlated with ETDRS BCVA (ρ = –0.35; P = 0.004), RS Cent 1’ (ρ = –0.32; P = 0.008), EZ length (ρ = –0.28; P = 0.023), and hyper-AF ring area (ρ = –0.31; P = 0.016). There was no significant correlation between systemic inflammatory markers and visual function. Eyes with intraocular lens (IOL) had significantly lower values of ETDRS BCVA (P = 0.004), RS Cent 1’ (P = 0.005), RS Cent 4’ (P = 0.010), CFT (P = 0.001), and EZ length (P = 0.011), in addition to higher values of aqueous flare (P < 0.001). Multiple linear regression analysis revealed that eyes with IOL (β = 0.262; P < 0.001) were significantly associated with aqueous flare. Conclusions: In the baseline data of the RP-PRIMARY study, aqueous flare, an ocular inflammatory marker, was negatively associated with visual function, and IOL implantation was most strongly associated with an increase in aqueous flare in patients with moderate-stage RP. The association between inflammatory markers and disease progression will be evaluated in the ongoing RP-PRIMARY study. Financial Disclosure(s): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.

    DOI: 10.1016/j.xops.2025.100930

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  • Baseline Relationships between Visual Function and Inflammatory Markers in the Registry of Moderated-Stage Retinitis Pigmentosa 査読

    石津 正崇, 池田 康博

    Ophthalmology science   6 ( 1 )   100930   2026年1月   eISSN:26669145

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    記述言語:英語   出版者・発行元:Elsevier BV  

    Purpose
    To analyze the association between visual function and inflammatory markers in the baseline data of a prospective natural history registry of patients with typical retinitis pigmentosa (RP) (Retinitis Pigmentosa Progression and Inflammatory Marker Registry Study [RP-PRIMARY Study]).
    Design
    A cross-sectional observational study using baseline data from the RP-PRIMARY study.
    Participants
    A total of 67 patients with moderate-stage typical RP who were treated between October 2021 and October 2022 in 1 of 3 participating hospitals consented to participate and met the inclusion criteria.
    Methods
    Visual functions were ETDRS best-corrected visual acuity (BCVA), Humphrey Field Analyzer 10-2 program (mean deviation value, and the mean sensitivity within the central 1° area [central 4 points, RS Cent 1’] and the 4° area [central 12 points, RS Cent 4’]), ellipsoid zone (EZ) length, central foveal thickness (CFT), hyper-autofluorescence (AF) ring area, and inflammatory markers were aqueous flare and blood test measurements.
    Main Outcome Measures
    Association between visual function and inflammatory markers.
    Results
    The median age of participants was 51 (interquartile range: 43–60) years. Spearman rank correlation coefficient demonstrated that aqueous flare values were negatively correlated with ETDRS BCVA (ρ = –0.35; P = 0.004), RS Cent 1’ (ρ = –0.32; P = 0.008), EZ length (ρ = –0.28; P = 0.023), and hyper-AF ring area (ρ = –0.31; P = 0.016). There was no significant correlation between systemic inflammatory markers and visual function. Eyes with intraocular lens (IOL) had significantly lower values of ETDRS BCVA (P = 0.004), RS Cent 1’ (P = 0.005), RS Cent 4’ (P = 0.010), CFT (P = 0.001), and EZ length (P = 0.011), in addition to higher values of aqueous flare (P < 0.001). Multiple linear regression analysis revealed that eyes with IOL (β = 0.262; P < 0.001) were significantly associated with aqueous flare.
    Conclusions
    In the baseline data of the RP-PRIMARY study, aqueous flare, an ocular inflammatory marker, was negatively associated with visual function, and IOL implantation was most strongly associated with an increase in aqueous flare in patients with moderate-stage RP. The association between inflammatory markers and disease progression will be evaluated in the ongoing RP-PRIMARY study.

    CiNii Research

  • Association of deep learning-derived optic nerve morphology with Parkinson's disease and drug-induced Parkinsonism: Findings from the LIFE Study 査読

    Ueda, E; Watanabe, M; Maeda, M; Oda, F; Fujiwara, K; Nakamura, S; Tsuda, Y; Mimura, W; Isobe, N; Sonoda, KH; Fukuda, H

    JOURNAL OF THE NEUROLOGICAL SCIENCES   479   123751   2025年12月   ISSN:0022-510X eISSN:1878-5883

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    記述言語:英語   出版者・発行元:Journal of the Neurological Sciences  

    Background: There is a growing need for alternative imaging measures to better understand the neurodegenerative pathology of Parkinson's disease and related conditions, such as drug-induced Parkinsonism. This study investigated the link between optic nerve morphology, specifically, the cup-to-disc ratio, a known neurodegenerative marker, and the presence of Parkinson's disease and drug-induced Parkinsonism in a large-scale, population-based study. Methods: A total of 14,280 participants aged 40–64 years with available fundus photographs and health data were included from a community-based database of the Longevity Improvement & Fair Evidence (LIFE) Study in Japan. The cup-to-disc ratios were analyzed through deep learning techniques using fundus photographs. Participants were categorized into quartiles based on these measurements. Parkinson's disease and drug-induced Parkinsonism were identified using International Classification of Diseases, 10th Revision codes and prescription records. Odd ratios (ORs) and 95 % confidence intervals (CIs) were estimated using logistic regression models. Results: Among the participants, 131 (0.9 %) had Parkinson's disease, and 152 (1.1 %) had drug-induced Parkinsonism. After adjusting for potential confounders, participants in the highest quartile of cup-to-disc ratio had a significantly higher likelihood of Parkinson's disease compared with those in the lowest quartile (OR = 1.74, 95 % CI = 1.07–2.86, p = 0.02). No significant association was found between cup-to-disc ratio and drug-induced Parkinsonism. Conclusions: These findings suggest that optic nerve morphology information derived from deep learning analysis of fundus photographs—a noninvasive, convenient, and reproducible method—may help assess specific neurogenerative processes in Parkinson's disease.

    DOI: 10.1016/j.jns.2025.123751

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  • Clinical characteristics of <i>EYS</i>-associated retinal dystrophy in 291 Japanese patients 査読

    Koyanagi, Y; Murakami, Y; Kominami, T; Fukushima, M; Goto, K; Yokota, S; Mizobuchi, K; Mawatari, G; Torii, K; Inoue, Y; Ota, J; Okuda, D; Fujiwara, K; Yamaga, H; Hisai, T; Endo, M; Iijima, H; Kaida, T; Miyata, K; Nakazaki, S; Hayashi, T; Hirami, Y; Akiyama, M; Terao, C; Momozawa, Y; Sonoda, KH; Nishiguchi, KM; Ikeda, Y

    NPJ GENOMIC MEDICINE   11 ( 1 )   3   2025年12月   eISSN:2056-7944

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    記述言語:英語   出版者・発行元:Npj Genomic Medicine  

    Eyes shut homolog (EYS) is the most common autosomal recessive causative gene of inherited retinal dystrophy (IRD) in the Japanese population, yet genotype–phenotype correlation data remain limited. We analyzed 291 probands (141 males, 150 females) with IRD caused by EYS (EYS–RD) from eight Japanese facilities. Clinical variables included age at onset, initial symptoms, best-corrected visual acuity (BCVA), and its progression alongside genotype information. Mean onset was 25.8 ± 14.9 years, most often night blindness (67.0%), and rod–cone dystrophy was observed in 95.9%. Initial BCVA averaged 0.34 ± 0.56 logMAR, declining 0.03 ± 0.06 logMAR/year, with low vision and blindness estimated at 48.4 and 73.6 years, respectively. Three major East Asian–specific pathogenic variants (S1653fs, Y2935X, and G843E) accounted for 88.7% of all cases. S1653fs homozygotes showed the earliest onset (mean, 18.4 years). These findings support the potential of genetic testing for personalized medicine tailored to population characteristics.

    DOI: 10.1038/s41525-025-00541-0

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  • Ocular and systemic immune profiles associated with cystoid macular edema in retinitis pigmentosa 査読

    Tao, Y; Zhao, HY; Shimokawa, S; Fukushima, M; Fujiwara, K; Hisai, T; Yamamoto, K; Okita, A; Sonoda, KH; Murakami, Y

    FRONTIERS IN OPHTHALMOLOGY   5   1653404   2025年9月   eISSN:2674-0826

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    記述言語:英語   出版者・発行元:Frontiers in Ophthalmology  

    Purpose: We aimed to investigate the local and systemic inflammatory profiles associated with cystoid macular edema (CME) in patients with retinitis pigmentosa (RP). Patients and methods: Paired aqueous humor and serum samples were collected at the time of cataract surgery from 37 eyes of 37 patients with typical RP, including 29 without CME and eight with CME. The concentrations of cytokines and chemokines were determined using a multiplexed immunoassay (Q-Plex). Group comparisons were conducted to assess differences in the inflammatory molecule levels between the RP patients with and without CME. Correlations among the intraocular parameters, the systemic inflammatory molecules, and the CME status were analyzed. Results: Compared to RP patients without CME, those with CME showed significantly increased aqueous levels of interleukin 23 (IL-23) (p = 0.002), I-309 (p = 0.039), and growth-related oncogene alpha (GROα) (p = 0.042). A multiple-factor analysis further supported a potential association between CME formation and an IL-23-related inflammatory network characterized by aqueous IL-23, IL-8, GROα, eotaxin, I-309, serum IL-23, and IFN-γ. Conclusion: These findings suggest that both intraocular and systemic immune activation may play a role in the development of CME in patients with RP. Specifically, IL-23-driven inflammation may be associated with macular fluid accumulation. Further longitudinal studies in larger cohorts are necessary to elucidate these relationships and explore their clinical implications.

    DOI: 10.3389/fopht.2025.1653404

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  • Relationship of Choroidal Thickness With Age-Related Macular Degeneration in Asians: An Asian Eye Epidemiology Consortium Meta-Analysis 査読

    Sasaki, M; Cheong, KX; Chong, CCY; Yu, M; Hanyuda, A; Yuki, K; Negishi, K; Hashimoto, S; Fujiwara, K; Sonoda, K; Wang, YX; Gao, F; Amornpetchsathaporn, A; Chainakul, M; Srinivasan, R; Khan, R; Raman, R; Ruamviboonsuk, P; Kim, SH; Song, SJ; Emamian, MH; Hashemi, H; Fotouhi, A; Liu, JP; Li, XR; Jonas, JB; Cheung, CMG; Wong, TY; Cheng, CY; Tham, YC; Yanagi, Y; Tan, ACS

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   66 ( 6 )   36   2025年6月   ISSN:0146-0404 eISSN:1552-5783

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    記述言語:英語   出版者・発行元:Investigative Ophthalmology and Visual Science  

    PURPOSE. To compare the choroidal thickness (CT) of participants with various stages of age-related macular degeneration vs. normal controls through a meta-analysis of studies conducted within the Asian Eye Epidemiology Consortium. METHODS. Eight population-based studies from China, Iran, Japan, and Singapore were included. Axial length and spherical equivalent measurements and imaging with color fundus photography and spectral-domain optical coherence tomography were performed. Random-effects meta-analysis was performed to examine the association between AMD and its stages (early AMD, intermediate AMD [iAMD], neovascular AMD [nAMD], and geographic atrophy [GA]) with CT, while adjusting for age, sex, current smoking status, and axial length/spherical equivalent. RESULTS. Of 17,916 participants, 13,116 participants (mean age, 62.15 ± 9.66 years) were included into the study. The mean unadjusted CT was 245.01 ± 84.04 μm (mean CT, 255.4 μm [no AMD], 263.59 μm [early AMD], 270.64 μm [iAMD], 273.32 μm [nAMD], and 156.50 μm [GA]). The presence of AMD was associated with a thicker choroid (β = 11.51; 95% confidence interval [CI], 4.10–18.92). AMD severity was also positively associated with CT. Early AMD (β = 8.75; 95% CI, 0.03–17.47), iAMD (β = 19.68; 95% CI, 13.20–26.16), and nAMD (β = 34.15; 95% CI, 6.84–61.46) were each positively associated with a thicker CT after adjusting for age, sex, smoking, and spherical equivalent. GA was not significantly associated with CT. CONCLUSIONS. In a large Asian cohort, AMD is associated with a thicker choroid in early AMD, iAMD, and nAMD, but not in GA. Studying the CT will help to better characterize Asian AMD phenotypes, which may show differences compared with AMD phenotypes in Western populations.

    DOI: 10.1167/iovs.66.6.36

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  • チューブシャント手術後にプレート脱出を認めた続発緑内障の2例 査読

    山家 華代, 藤原 康太, 浅原 裕樹, 沖田 絢子, 石川 桂二郎, 園田 康平, 村上 祐介

    眼科臨床紀要   18 ( 6 )   353 - 357   2025年6月   ISSN:1882-5176

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    記述言語:日本語   出版者・発行元:眼科臨床紀要会  

    背景:緑内障チューブシャント手術後に,プレート脱出を認めた2症例を報告する.症例:症例1は43歳男性.アトピー性皮膚炎があり,右眼の網膜剥離に対して硝子体手術,輪状締結術,眼内レンズ摘出術の手術歴があった.続発緑内障に対してアーメド挿入術(耳上側),シリコンバンド摘出術,アーメド挿入術(鼻上側)を順次施行した.術8ヵ月後に鼻上側のプレート脱出を認め,インプラントを摘出した.症例2は73歳女性.左眼の鈍的外傷による虹彩炎,水晶体亜脱臼,眼圧上昇に対して,水晶体摘出術と硝子体手術を行うも高眼圧が持続したため,眼内レンズ強膜内固定,アーメド挿入術(鼻上側)を施行した.術3ヵ月後にプレート脱出を認め,インプラントを摘出した.結論:プレート脱出の原因として,鼻上側への留置,複数回の手術既往,挿入部への炎症反応などが関与した可能性がある.高リスク例では,留置部位や術後消炎に配慮する必要がある.(著者抄録)

  • Study protocol for a prospective natural history registry investigating the relationships between inflammatory markers and disease progression in retinitis pigmentosa: the RP-PRIMARY study 査読

    Murakami, Y; Hisai, T; Shimokawa, S; Fukushima, M; Fujiwara, K; Hirata, A; Takada, A; Miyahara, F; Nakashima, N; Kobayakawa, Y; Arima, M; Mawatari, G; Ishizu, M; Kaida, T; Miyata, K; Ikeda, Y; Sonoda, KH

    JAPANESE JOURNAL OF OPHTHALMOLOGY   69 ( 3 )   378 - 386   2025年5月   ISSN:0021-5155 eISSN:1613-2246

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    記述言語:英語   出版者・発行元:Japanese Journal of Ophthalmology  

    Purpose: The Retinitis Pigmentosa Progression and Inflammatory Marker Registry (RP-PRIMARY) is intended as a prospective observational study aimed at establishing sensitive outcome measures to detect the efficacy of anti-inflammatory agents in future clinical trials. The following is the RP-PRIMARY study protocol. Study Design: Prospective, multicenter study. Methods: We will recruit 100 patients with typical RP (any genetic mutation) and the following characteristics: age 20–70 years; mean retinal sensitivity ≥ 10 dB at 12 central points on Humphrey 10-2 visual field tests; central foveal thickness ≤ 250 μm on optical coherence tomography (OCT); and no ocular complications unrelated to RP or serious systemic complications. Early Treatment Diabetic Retinopathy Study (ETDRS). visual acuity, Humphrey 10-2 visual field tests, OCT, and fundus autofluorescence imaging will be performed every 3 months for 2 years. Inflammatory indices such as aqueous flare values, high-sensitivity C-reactive protein (CRP), serum IL-8, and CD14/16 inflammatory monocyte proportion will be measured every year. The primary endpoint will be the progression rate of retinal sensitivity loss on the Humphrey 10-2 visual field tests. The secondary endpoints will be the rate of decline of each parameter and its association with inflammatory indices. Standard-operation-procedure documents were prepared for all study procedures, and consultations with the regulatory agency were conducted to ensure the data reliability for future use in clinical trials. Conclusions: Detailed registry data on the natural history and inflammatory profile of RP will be useful in designing study protocols for anti-inflammatory therapy for RP and as natural history data for drug applications.

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  • 網膜色素変性症における炎症性マーカーと疾患増悪との関係を評価する前向き自然歴レジストリの研究プロトコル RP-PRIMARY研究(Study protocol for a prospective natural history registry investigating the relationships between inflammatory markers and disease progression in retinitis pigmentosa: the RP-PRIMARY study) 査読

    Murakami Yusuke, Hisai Takahiro, Shimokawa Sakurako, Fukushima Masatoshi, Fujiwara Kohta, Hirata Akie, Takada Atsushi, Miyahara Fuyuka, Nakashima Naoki, Kobayakawa Yuko, Arima Mitsuru, Mawatari Go, Ishizu Masataka, Kaida Tomoko, Miyata Kazunori, Ikeda Yasuhiro, Sonoda Koh-Hei

    Japanese Journal of Ophthalmology   69 ( 3 )   378 - 386   2025年5月   ISSN:0021-5155

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    記述言語:英語   出版者・発行元:シュプリンガー・ジャパン(株)  

    網膜色素変性症(RP)患者にみられる炎症性マーカーと疾患増悪との関係を評価する前向き自然歴レジストリ(RP-PRIMARY)の研究プロトコルを紹介した。本レジストリは何らかの遺伝子変異を有する定型RP患者100例を対象とする前向き多施設研究であり、20~70歳、Humphrey 10-2視野検査において中心点12ヶ所の平均網膜感度が10dB以上、OCT所見における中心窩網膜厚250μm以下、眼合併症や全身性合併症を有さないことをレジストリ登録の選定基準とし、除外基準はヘモグロビン値8g/dL以下の貧血、全身状態不良、緑内障または眼圧亢進、ブドウ膜炎または視神経炎とする。RPの疾患増悪の評価として視力検査、Humphrey 10-2視野検査、OCT検査、眼底自己蛍光画像検査を3ヵ月ごとに行い、炎症性パラメータとして房水フレア値、高感度CRP、血清中IL-8、CD14/16炎症性単球比率を測定する。主要評価項目はHumphrey 10-2視野検査における網膜感受性欠失の増悪率、副次評価項目は視力検査、OCT検査および眼底自己蛍光画像検査の各所見の増悪率と炎症性パラメータとの関連とする。本レジストリがRPに対する抗炎症治療のプロトコル作成の一助となることが期待される。

  • 網膜色素変性症に対する遮光眼鏡処方の特徴と視機能との関連 査読

    長野 水紀, 藤原 康太, 村上 祐介, 塚本 晶子, 堀江 宏一郎, 伊藤 雪乃, 高藤 渚沙, 瀬戸 寛子, 園田 康平

    あたらしい眼科   42 ( 3 )   363 - 367   2025年3月   ISSN:0910-1810

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    記述言語:日本語   出版者・発行元:(株)メディカル葵出版  

    目的:網膜色素変性症(RP)患者に処方された遮光眼鏡の特徴(色,視感透過率)と視機能との関連について検討した.対象と方法:2019~2022年に屋外用遮光眼鏡を処方したRP患者34例について,診療録を後ろ向きに調査した.視機能の指標として,視力良好眼の矯正視力(logMAR)と視力・視野検査の結果からFunctional Acuity Score(FAS),Functional Field Score(FFS),Functional Vision Score(FVS)を算出し,処方した遮光眼鏡の視感透過率との関連についてスコアを比較検討した.結果:平均年齢は63.0±11.3歳.処方した遮光眼鏡の色はブラウン系17例,グレー系9例,グリーン系8例であった.各視機能スコアの平均値は,視力良好眼のlogMAR値:0.49±11.3,FAS:71±25,FFS:33±16,FVS:26±18であった.すべての視機能スコアと視感透過率との間に有意な相関が認められた(p<0.01).結論:RP患者の遮光眼鏡のカラー選択はブラウン系が多かった.視機能スコアの低い患者ほど視感透過率の低いレンズを選択した.(著者抄録)

  • 色覚異常の型分類が左右眼で異なった1例 査読

    八尾 睦美, 堀江 宏一郎, 瀬戸 寛子, 藤原 康太, 園田 康平

    日本視能訓練士協会誌   54   104 - 104   2025年2月   ISSN:0387-5172

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    記述言語:日本語   出版者・発行元:(公社)日本視能訓練士協会  

  • Three-month outcomes of treatment with faricimab or aflibercept for neovascular age-related macular degeneration: a propensity score matching study in a Japanese population 査読

    Fukuda, Y; Notomi, S; Shiose, S; Maehara, Y; Kiyohara, K; Fujiwara, K; Hashimoto, S; Kano, K; Ishikawa, K; Hisatomi, T; Sonoda, KH

    GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY   262 ( 12 )   3971 - 3978   2024年12月   ISSN:0721-832X eISSN:1435-702X

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    記述言語:英語   出版者・発行元:Graefe S Archive for Clinical and Experimental Ophthalmology  

    Purpose: This study aimed to compare the treatment outcomes of patients with neovascular age-related macular degeneration (nAMD) who initially received faricimab or aflibercept treatment using propensity score matching (PSM) to align patient backgrounds. Methods: Patients with treatment-naïve nAMD who received either faricimab or aflibercept for three consecutive monthly injections as the loading phase were enrolled in this study. In the 1:1 PSM, sex, age, best-corrected visual acuity (BCVA), central macular thickness (CMT), central choroidal thickness (CCT), and AMD subtypes in the pre-treatment state were selected as covariates. We examined the BCVA, CMT, CCT, and remaining fluid at 1-, 2-, and 3-month after the first injection. Results: After PSM, 43 eyes were included in the faricimab and aflibercept group each. Both groups showed significant improvements in BCVA, CMT, and CCT at 1-, 2-, and 3-month after the initial injection compared with baseline. Meanwhile, no significant differences were observed between the two groups at any time point regarding BCVA, CMT, and CCT. At 1-month, 18.6% of patients in the faricimab group and 41.9% in the aflibercept group demonstrated residual subretinal fluid or intraretinal fluid, with a significant difference between the groups (P = 0.03). Conclusion: The BCVA improved after three loading injections of both faricimab and aflibercept. Faricimab may provide a favorable early treatment response in reducing subretinal fluid in a Japanese cohort.

    DOI: 10.1007/s00417-024-06582-y

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  • Comparison of Microperimetry and Static Perimetry for Evaluating Macular Function and Progression in Retinitis Pigmentosa 査読

    Fukushima, M; Tao, Y; Shimokawa, S; Zhao, HY; Shimokawa, S; Funatsu, J; Hisai, T; Okita, A; Fujiwara, K; Hisatomi, T; Takeda, A; Ikeda, Y; Sonoda, KH; Murakami, Y

    OPHTHALMOLOGY SCIENCE   4 ( 6 )   100582   2024年12月   ISSN:2666-9145

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    記述言語:英語   出版者・発行元:Ophthalmology Science  

    Purpose: To compare the usefulness of microperimetry and static automated perimetry in patients with retinitis pigmentosa (RP), using macular anatomical metrics as a reference. Design: Prospective observational study. Participants: Forty-eight eyes of 48 patients with RP in Kyushu University Hospital who underwent microperimetry-3 (MP-3) and Humphrey Field Analyzer (HFA) 10-2 testing ≥3 times during ≥2 years were included. Methods: Macular anatomy (ellipsoid zone [EZ] length) was assessed by OCT, and macular function was assessed by MP-3 (mean retinal sensitivity at radii 2°, 4°, and 8°) and HFA10-2 program (mean retinal sensitivity at radii 2°, 4°, and 8°). Correlations between functional and anatomical parameters were analyzed cross sectionally at baseline and longitudinally by comparing the rate of progression. Main Outcome Measures: Correlation coefficients between anatomical and functional metrics. Results: The mean age at baseline was 50.1 ± 12.3 years, and the mean follow-up period was 2.8 ± 0.7 years. At baseline, EZ length was significantly correlated with MP-3 mean retinal sensitivity at radii 2°, 4°, and 8° (Spearman's ρ = 0.65, 0.84, 0.89; all P < 0.005) and HFA10-2 mean retinal sensitivity at radii 2°, 4°, and 8° (Spearman's ρ = 0.61, 0.73, 0.78; all P < 0.005). Longitudinal analysis showed that the slope of EZ length (−88.92 μm/year) was significantly correlated with the slope of MP-3 retinal sensitivity at 8° radius (−0.62 decibels [dB]/year; Spearman's ρ = 0.31, P=0.03) and the slope of HFA retinal sensitivity at 8° radius (−0.60 dB/year; Spearman's ρ = 0.43, P < 0.005). Conclusions: Both MP-3 and HFA values were cross sectionally well-correlated with EZ length in patients with patients; however, these associations became weaker in the longitudinal analysis. This highlights the need for researchers to explore additional or more sensitive parameters to better monitor RP progression. Financial Disclosure(s): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.

    DOI: 10.1016/j.xops.2024.100582

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  • Genetic Risk Stratification of Primary Open-Angle Glaucoma in Japanese Individuals 査読

    Akiyama, M; Tamiya, G; Fujiwara, K; Shiga, Y; Yokoyama, Y; Hashimoto, K; Sato, M; Sato, K; Narita, A; Hashimoto, S; Ueda, E; Furuta, Y; Hata, J; Miyake, M; Ikeda, HO; Suda, K; Numa, S; Mori, Y; Morino, K; Murakami, Y; Shimokawa, S; Nakamura, S; Yawata, N; Fujisawa, K; Yamana, S; Mori, K; Ikeda, Y; Miyata, K; Mori, K; Ogino, K; Koyanagi, Y; Kamatani, Y; Sonoda, KH; Nakazawa, T

    OPHTHALMOLOGY   131 ( 11 )   1271 - 1280   2024年11月   ISSN:0161-6420 eISSN:1549-4713

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    記述言語:英語   出版者・発行元:Ophthalmology  

    Purpose: To assess the impact of genetic risk estimation for primary open-angle glaucoma (POAG) in Japanese individuals. Design: Cross-sectional analysis. Participants: Genetic risk scores (GRSs) were constructed based on a genome-wide association study (GWAS) of POAG in Japanese people. A total of 3625 Japanese individuals, including 1191 patients and 2434 controls (Japanese Tohoku), were used for the model selection. We also evaluated the discriminative accuracy of constructed GRSs in a dataset comprising 1034 patients and 1147 controls (the Japan Glaucoma Society Omics Group [JGS-OG] and the Genomic Research Committee of the Japanese Ophthalmological Society [GRC-JOS]) and 1900 participants from a population-based study (Hisayama Study). Methods: We evaluated 2 types of GRSs: polygenic risk scores using the pruning and thresholding procedure and a GRS using variants associated with POAG in the GWAS of the International Glaucoma Genetics Consortium (IGGC). We selected the model with the highest areas under the receiver operating characteristic curve (AUC). In the population-based study, we evaluated the correlations between GRS and ocular measurements. Main Outcome Measure: Proportion of patients with POAG after stratification according to the GRS. Results: We found that a GRS using 98 variants, which showed genome-wide significance in the IGGC, showed the best discriminative accuracy (AUC, 0.65). In the Japanese Tohoku, the proportion of patients with POAG in the top 10% individuals was significantly higher than that in the lowest 10% (odds ratio [OR], 6.15; 95% confidence interval [CI], 4.35–8.71). In the JGS-OG and GRC-JOS, we confirmed similar impact of POAG GRS (AUC, 0.64; OR [top vs. bottom decile], 5.81; 95% CI, 3.79–9.01). In the population-based study, POAG prevalence was significantly higher in the top 20% individuals of the GRS compared with the bottom 20% (9.2% vs. 5.0%). However, the discriminative accuracy was low (AUC, 0.56). The POAG GRS was correlated positively with intraocular pressure (r = 0.08: P = 4.0 × 10<sup>–4</sup>) and vertical cup-to-disc ratio (r = 0.11; P = 4.0 × 10<sup>–6</sup>). Conclusions: The GRS showed moderate discriminative accuracy for POAG in the Japanese population. However, risk stratification in the general population showed relatively weak discriminative performance. Financial Disclosure(s): Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.

    DOI: 10.1016/j.ophtha.2024.05.026

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  • Relationships between causative genes and epiretinal membrane formation in Japanese patients with retinitis pigmentosa 査読

    Nakamura, S; Fujiwara, K; Fukushima, M; Shimokawa, S; Shimokawa, S; Koyanagi, Y; Hisatomi, T; Takeda, A; Yasuhiro, I; Murakami, Y; Sonoda, KH

    GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY   262 ( 11 )   3553 - 3558   2024年11月   ISSN:0721-832X eISSN:1435-702X

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    担当区分:責任著者   記述言語:英語   出版者・発行元:Graefe S Archive for Clinical and Experimental Ophthalmology  

    Purpose: To investigate the relationships between macular complications and causative genes frequently found in Japanese patients with retinitis pigmentosa (RP). Methods: In the retrospective and observational study, we analyzed the data of 75 patients with RP (EYS-RP: 42 patients; USH2A-RP: 19 patients; RHO-RP: 14 patients) who were followed-up at Kyushu University Hospital and whose causative genes had been identified. Macular complications including epiretinal membrane (ERM), macular edema (ME), and macular hole (MH) were evaluated using optical coherence tomography and fundus photography. Main outcome was the proportion of macular complications. Results: The proportion of ERM was 35.7% in the EYS group, 10.5% in the USH2A group and 14.3% in the RHO group. The proportion of ME was 7.1% in the EYS group, 5.3% in the USH2A group and 14.3% in the RHO group, and that of MH was 2.4% in the EYS group, 5.3% in the USH2A group and 0% in the RHO group. In the EYS group, the proportion of ERM was relatively higher (p = 0.06), and the presence of EYS was significantly associated with a higher age- and sex-adjusted OR for ERM (OR = 5.67, 95% CI = 1.59–25.20). There was no significant difference in the proportion of MH or ME among causative genes. Conclusions: EYS causative gene may be associated with higher rate of ERM complication in RP.

    DOI: 10.1007/s00417-024-06534-6

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  • Intraocular kinetics of pathological ATP after photoreceptor damage in rhegmatogenous retinal detachment 査読

    Tachibana, T; Notomi, S; Funatsu, J; Fujiwara, K; Nakatake, S; Murakami, Y; Nakao, S; Kanamoto, T; Ikeda, Y; Ishibashi, T; Sonoda, KH; Hisatomi, T

    JAPANESE JOURNAL OF OPHTHALMOLOGY   68 ( 5 )   500 - 510   2024年9月   ISSN:0021-5155 eISSN:1613-2246

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    記述言語:英語   出版者・発行元:Japanese Journal of Ophthalmology  

    Purpose: Extracellular Adenosine triphosphate (ATP) released by dying cells may cause a secondary cell death in neighboring cells in retinal degeneration. We investigated intraocular ATP kinetics to gain mechanical insights into the pathology in rhegmatogenous retinal detachment (RRD). Study design: Retrospective clinical study. Methods: Vitreous or subretinal fluids (SRF) were obtained from patients with RRD (n=75), macular hole (MH; n=20), and epiretinal membrane (ERM; n=35) during vitrectomy. ATP levels in those samples were measured by luciferase assay. Results: Mean ATP levels in the vitreous from RRD patients were significantly higher compared to those from MH and ERM patients (2.3 and 0.3 nM, respectively. P<0.01). Mean ATP levels in the SRF from RRD (11.7 nM) were higher than those in the vitreous from RRD (P<0.01). Mean ATP levels in the vitreous with short durations (1–8 days) of RRD were higher compared to those with long durations (>8 days) (3.2 and 1.4 nM, respectively. P<0.05). Similarly, ATP in SRF with short durations were higher than those with long durations (23.8 and 3.6 nM, respectively. P<0.05). Furthermore, the concentrations of ectonucleoside triphosphate diphosphohydrolase-1 (ENTPD1), a major ATP degradative enzyme, in the vitreous from RRD were higher than those from MH/ERM (1.2 and 0.2 ng/ml, respectively. P<0.01). ENTPD1 expression was localized in the cytoplasm of CD11b-positive infiltrating cells in the vitreous and retinal cells. Conclusion: ATP increased in the vitreous and SRF in RRD and decreased over time with an upregulation of ENTPD1. The kinetics indicate the pathological mechanism of the excessive extracellular ATP after RRD.

    DOI: 10.1007/s10384-024-01087-x

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  • 裂孔原性網膜剥離における光受容体損傷後の病理的ATPの眼内動態(Intraocular kinetics of pathological ATP after photoreceptor damage in rhegmatogenous retinal detachment) 査読

    Tachibana Takashi, Notomi Shoji, Funatsu Jun, Fujiwara Kohta, Nakatake Shunji, Murakami Yusuke, Nakao Shintaro, Kanamoto Takashi, Ikeda Yasuhiro, Ishibashi Tatsuro, Sonoda Koh-hei, Hisatomi Toshio

    Japanese Journal of Ophthalmology   68 ( 5 )   500 - 510   2024年9月   ISSN:0021-5155

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    記述言語:英語   出版者・発行元:シュプリンガー・ジャパン(株)  

    裂孔原性網膜剥離(RRD)にみられる眼内アデノシン三リン酸(ATP)の動態を検討した。RRD患者75例、黄斑円孔(MH)患者20例および網膜上膜(ERM)患者35例から硝子体切除中に硝子体液または網膜下液(SRF)を採取してATP濃度を測定した。RRD群の硝子体中ATP値は2.28±4.27nMであり、MH/ERM群(0.30±0.65nM)より有意に高く、SRF中ATP値は11.7±25.1nMと硝子体中濃度と比較して有意に高値を示していた。RRD群を罹病期間1~8日の32例と8日超の32例に分けると、罹病期間短期群の方が硝子体中・SRF中ATP値は高くなっていた。また、硝子体中ATPの分解能はRRD群の方がMH/ERM群より有意に高く、RRD群のアデノシン二リン酸(ADP)値はMH/ERM群より高かったことから、過剰なATPに対して酵素的分解が生じていると考えられた。さらに、RRD群でエクトヌクレオチダーゼとしてのENTPD1の濃度を測定したところ、罹病期間短期群と長期群との間に有意差はみられず、ENTPD1はRRDの発症直後に発現を呈して長期間にわたり維持されると考えられ、ENTPD1は硝子体細胞と網膜細胞の細胞質内に局在していた。ATPはRRD患者の硝子体とSRFにおいて高発現を呈し、ENTPD1のアップレギュレーションに伴って経時的に減少していた。

  • Ocular and Serum Profiles of Inflammatory Molecules Associated With Retinitis Pigmentosa 査読

    Tao, Y; Fukushima, M; Shimokawa, S; Zhao, HY; Okita, A; Fujiwara, K; Takeda, A; Mukai, S; Sonoda, KH; Murakami, Y

    TRANSLATIONAL VISION SCIENCE & TECHNOLOGY   13 ( 8 )   18   2024年8月   ISSN:2164-2591

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    記述言語:英語   出版者・発行元:Translational Vision Science and Technology  

    Purpose: To investigate the profiles and correlations between local and systemic inflammatory molecules in patients with retinitis pigmentosa (RP). Methods: The paired samples of aqueous humor and serum were collected from 36 eyes of 36 typical patients with RP and 25 eyes of age-matched patients with cataracts. The concentration of cytokines/chemokines was evaluated by a multiplexed immunoarray (Q-Plex). The correlations between ocular and serum inflammatory molecules and their association with visual function were analyzed. Results: The aqueous levels of IL-6, Eotaxin, GROα, I-309, IL-8, IP-10, MCP-1, MCP-2, RANTES, and TARC were significantly elevated in patients with RP compared to controls (all P < 0.05). The detection rate of aqueous IL-23 was higher in patients with RP (27.8%) compared with controls (0%). In patients with RP, Spearman correlation test demon-strated positive correlations for IL-23, I-309, IL-8, and RANTES between aqueous and serum expression levels (IL-23: ρ = 0.8604, P < 0.0001; I-309: ρ = 0.4172, P = 0.0113; IL-8: ρ = 0.3325, P = 0.0476; RANTES: ρ = 0.6685, P < 0.0001). In addition, higher aqueous IL-23 was associated with faster visual acuity loss in 10 patients with RP with detected aqueous IL-23 (ρ = 0.4119 and P = 0.0264). Multiple factor analysis confirmed that aqueous and serum IL-23 were associated with visual acuity loss in patients with RP. Conclusions: These findings suggest that ocular and systemic inflammatory responses have a close interaction in patients with RP. Further longitudinal studies with larger cohorts are needed to explore the correlation between specific inflammatory pathways and the progression of RP. Translational Relevance: This study demonstrates the local–systemic interaction of immune responses in patients with RP.

    DOI: 10.1167/tvst.13.8.18

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  • Disease-specific variant interpretation highlighted the genetic findings in 2325 Japanese patients with retinitis pigmentosa and allied diseases 査読

    Goto, K; Koyanagi, Y; Akiyama, M; Murakami, Y; Fukushima, M; Fujiwara, K; Iijima, H; Yamaguchi, M; Endo, M; Hashimoto, K; Ishizu, M; Hirakata, T; Mizobuchi, K; Takayama, M; Ota, J; Sajiki, A; Kominami, T; Ushida, H; Fujita, K; Kaneko, H; Ueno, S; Hayashi, T; Terao, C; Hotta, Y; Murakami, A; Kuniyoshi, K; Kusaka, S; Wada, Y; Abe, T; Nakazawa, T; Ikeda, Y; Momozawa, Y; Sonoda, KH; Nishiguchi, KM

    JOURNAL OF MEDICAL GENETICS   61 ( 7 )   613 - 620   2024年7月   ISSN:0022-2593 eISSN:1468-6244

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    記述言語:英語   出版者・発行元:Journal of Medical Genetics  

    Background As gene-specific therapy for inherited retinal dystrophy (IRD) advances, unified variant interpretation across institutes is becoming increasingly important. This study aims to update the genetic findings of 86 retinitis pigmentosa (RP)-related genes in a large number of Japanese patients with RP by applying the standardised variant interpretation guidelines for Japanese patients with IRD (J-IRD-VI guidelines) built upon the American College of Medical Genetics and Genomics and the Association for Molecular Pathology rules, and assess the contribution of these genes in RP-allied diseases. Methods We assessed 2325 probands with RP (n=2155, including n=1204 sequenced previously with the same sequencing panel) and allied diseases (n=170, newly analysed), including Usher syndrome, Leber congenital amaurosis and cone-rod dystrophy (CRD). Target sequencing using a panel of 86 genes was performed. The variants were interpreted according to the J-IRD-VI guidelines. Results A total of 3564 variants were detected, of which 524 variants were interpreted as pathogenic or likely pathogenic. Among these 524 variants, 280 (53.4%) had been either undetected or interpreted as variants of unknown significance or benign variants in our earlier study of 1204 patients with RP. This led to a genetic diagnostic rate in 38.6% of patients with RP, with EYS accounting for 46.7% of the genetically solved patients, showing a 9% increase in diagnostic rate from our earlier study. The genetic diagnostic rate for patients with CRD was 28.2%, with RP-related genes significantly contributing over other allied diseases. Conclusion A large-scale genetic analysis using the J-IRD-VI guidelines highlighted the population-specific genetic findings for Japanese patients with IRD; these findings serve as a foundation for the clinical application of gene-specific therapies.

    DOI: 10.1136/jmg-2023-109750

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  • Distinct retinal reflectance spectra from retinal hyperspectral imaging in Parkinson's disease 査読

    Ueda, E; Watanabe, M; Nakamura, D; Matsuse, D; Tanaka, E; Fujiwara, K; Hashimoto, S; Nakamura, S; Isobe, N; Sonoda, KH

    JOURNAL OF THE NEUROLOGICAL SCIENCES   461   123061   2024年6月   ISSN:0022-510X eISSN:1878-5883

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    記述言語:英語   出版者・発行元:Journal of the Neurological Sciences  

    Background: Recent developments in the retinal hyperspectral imaging method have indicated its potential in addressing challenges posed by neurodegenerative disorders, such as Alzheimer's disease. This human clinical study is the first to assess reflectance spectra obtained from this imaging as a tool for diagnosing patients with Parkinson's disease (PD). Methods: Retinal hyperspectral imaging was conducted on a total of 40 participants, including 20 patients with PD and 20 controls. Following preprocessing, retinal reflectance spectra were computed for the macular retina defined by four rectangular regions. Linear discriminant analysis classifiers underwent training to discern patients with PD from control participants. To assess the performance of the selected features, nested leave-one-out cross-validation was employed using machine learning. The indicated values include the area under the curve (AUC) and the corresponding 95% confidence interval (CI). Results: Retinal reflectance spectra of PD patients exhibited variations in the spectral regions, particularly at shorter wavelengths (superonasal retina, wavelength < 490 nm; inferonasal retina, wavelength < 510 nm) when compared to those of controls. Retinal reflectance spectra yielded an AUC of 0.60 (95% CI: 0.43–0.78) and 0.60 (95% CI: 0.43–0.78) for the superonasal and inferonasal retina, respectively, distinguishing individuals with and without PD. Conclusion: Reflectance spectra obtained from retinal hyperspectral imaging tended to decrease at shorter wavelengths across a broad spectral range in PD patients. Further investigations building upon these preliminary findings are imperative to focus on the retinal spectral signatures associated with PD pathological hallmarks, including α-synuclein.

    DOI: 10.1016/j.jns.2024.123061

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  • Baseline Visual Function and Inflammatory Markers in the RP PRIMARY Study

    Hisai, T; Shimokawa, S; Fukushima, M; Fujiwara, K; Hirata, A; Takada, A; Kobayakawa, Y; Mawatari, G; Ishizu, M; Kaida, T; Miyata, K; Ikeda, Y; Sonoda, KH; Murakami, Y

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   65 ( 7 )   2024年6月   ISSN:0146-0404 eISSN:1552-5783

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  • Retinal Pigment Epithelium Damage and Mitochondria! Dysfunction in a Mouse Model of Bietti's Crystalline Dystrophy 査読

    Fukushima, M; Zhao, HY; Tao, Y; Shimokawa, S; Hisai, T; Fujiwara, K; Notomi, S; Sonoda, KH; Murakami, Y

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   65 ( 7 )   2024年6月   ISSN:0146-0404 eISSN:1552-5783

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  • Association between retinopathy and risk of dementia in a general Japanese population: the Hisayama Study

    Nakamura, S; Ueda, E; Ohara, T; Hata, J; Honda, T; Fujiwara, K; Furuta, Y; Shibata, M; Hashimoto, S; Nakazawa, T; Nakao, T; Kitazono, T; Sonoda, KH; Ninomiya, T

    SCIENTIFIC REPORTS   14 ( 1 )   12017   2024年5月   ISSN:2045-2322

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    記述言語:英語   出版者・発行元:Scientific Reports  

    We investigated the association of retinopathy with the risk of dementia in a general older Japanese population. A total of 1709 population-based residents aged 60 years or older without dementia were followed prospectively for 10 years (2007–2017). They underwent color fundus photography in 2007. Retinopathy was graded according to the Modified Airlie House Classification. Main outcome was the Incidence of dementia. A Cox proportional hazards model was used to estimate the hazard ratios (HRs) and their 95% confidence intervals (CIs) for the risk of dementia by the presence of retinopathy. During the follow-up period, 374 participants developed all-cause dementia. The cumulative incidence of dementia was significantly higher in those with retinopathy than those without (p < 0.05). Individuals with retinopathy had significantly higher risk of developing dementia than those without after adjustment for potential confounding factors (HR 1.64, 95% CI 1.19–2.25). Regarding the components of retinopathy, the presence of microaneurysms was significantly associated with a higher multivariable-adjusted HR for incident dementia (HR 1.94, 95% CI 1.37–2.74). Our findings suggest that, in addition to systemic risk factors, retinal microvascular signs from fundus photography provide valuable information for estimating the risk of developing dementia.

    DOI: 10.1038/s41598-024-62688-7

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  • 日本人集団におけるRHO遺伝子が関与する網膜色素変性の遺伝子型と臨床像(Genotypes and clinical features of RHO-associated retinitis pigmentosa in a Japanese population) 査読

    Tsutsui Saki, Murakami Yusuke, Fujiwara Kohta, Koyanagi Yoshito, Akiyama Masato, Takeda Atsunobu, Ikeda Yasuhiro, Sonoda Koh-hei

    Japanese Journal of Ophthalmology   68 ( 1 )   1 - 11   2024年1月   ISSN:0021-5155

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    記述言語:英語   出版者・発行元:シュプリンガー・ジャパン(株)  

    九州地方で観察されたロドプシン遺伝子(RHO遺伝子)が関与する網膜色素変性(RHO-RP)症例の遺伝子型と臨床像を調べた。本研究は後ろ向き観察研究であり、当院で遺伝子解析を施行した網膜色素変性症(RP)患者508名のうち、RHO遺伝子に病原性変異が発見された2008~2020年の16名(女性10名、初診時平均54.0±15.7歳)を調査した。経過観察は平均で7.6±4.0年行われていた。RPの病型が典型的なものであった患者は14名(87.5%)を占め、うち4名はp.[Pro23Leu]変異を、2名はp.[Pro347Leu]変異を有していた。区画型の病型であった残りの2名はp.[Ala164Val]変異の保因者であった。最高矯正視力は、典型的RHO-RP集団では経過観察期間にわたって0.60logMARから1.08logMARへと低下していたが、区画型RHO-RP集団では0.04logMARに保たれていた。遺伝子型-表現型解析の結果、p.[Pro347Leu]は若齢での重度視力低下と関連していることが証明された。網膜前膜や嚢胞様黄斑浮腫といった黄斑合併症は典型的RHO-RPの5名で観察された。九州地方のRHO-RP症例においては、p.[Pro23His]ではなくp.[Pro23Leu]が最も頻度の高い病原性変異であった。

  • Genotypes and clinical features of <i>RHO</i>-associated retinitis pigmentosa in a Japanese population 査読

    Tsutsui, S; Murakami, Y; Fujiwara, K; Koyanagi, Y; Akiyama, M; Takeda, A; Ikeda, Y; Sonoda, KH

    JAPANESE JOURNAL OF OPHTHALMOLOGY   68 ( 1 )   1 - 11   2024年1月   ISSN:0021-5155 eISSN:1613-2246

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    記述言語:英語   出版者・発行元:Japanese Journal of Ophthalmology  

    Purpose: To report the genotypes and clinical features of RHO-associated retinitis pigmentosa (RHO-RP) in the Kyushu region of Japan. Study Design: Retrospective, single-center study. Methods: Sixteen RP patients with pathogenic RHO variants seen at Kyushu University Hospital were investigated. Clinical data including age, best-corrected visual acuity (BCVA) in logarithm of the minimum angle of resolution (logMAR) units, visual field, fundus photography, and optical coherence tomography were retrospectively obtained. Visual outcomes were compared between classical and sector phenotypes and among genetic variants. Results: The mean age at the first visit was 54.0 ± 15.7 years, with a mean follow-up of 7.6 ± 4.0 years. Fourteen patients (87.5%) showed the classical RP phenotype, of whom four were associated with p.[Pro23Leu] and two had p.[Pro347Leu] variants. In addition, two patients with the sector phenotype harbored p.[Ala164Val] variants. Among the classical RHO-RP patients, the mean BCVA decreased from 0.60 to 1.08 logMAR over the follow-up period (7.4 ± 4.1 years) whereas BCVA was preserved at 0.04 logMAR in sector RHO-RP patients (9.0 ± 3.0 years). Genotype-to-phenotype analysis demonstrated that p.[Pro347Leu] was associated with severe vision loss at an earlier age. Macular complications such as epiretinal membrane and cystoid macular edema were observed in 5 classical RHO-RP patients. Conclusion: p.[Pro23Leu], but not p.[Pro23His], was a frequent variant causing RHO-RP in the Kyushu region of Japan. As reported in previous studies, patients with the p.[Pro347Leu] variant showed a more severe phenotype, and variants causing sector RHO-RP were associated with a good prognosis.

    DOI: 10.1007/s10384-023-01036-0

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  • Association Between Choroidal Thickness and Myopic Maculopathy in a Japanese Population: The Hisayama Study

    Ueda, E; Yasuda, M; Fujiwara, K; Hashimoto, S; Honda, T; Nakamura, S; Hata, J; Ninomiya, T; Sonoda, KH

    OPHTHALMOLOGY SCIENCE   3 ( 4 )   100350   2023年12月   ISSN:2666-9145

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    記述言語:英語   出版者・発行元:Ophthalmology Science  

    Purpose: To examine the association between choroidal thickness and myopic maculopathy in a general Japanese population. Design: Population-based cross-sectional study. Participants: A total of 2841 residents of a Japanese community aged ≥ 40 years, who consented to participate and had available data of choroidal thickness and fundus photographs, were enrolled in this study. Methods: The choroidal thickness was measured by swept-source OCT. Participants were divided into quartiles of choroidal thickness. Myopic maculopathy was defined according to the classification system of the Meta-analysis of Pathologic Myopia Study Group. Main outcome measures were odds ratios (ORs) of choroidal thickness for prevalent myopic maculopathy. The ORs and 95% confidence intervals (CIs) were estimated using a logistic regression model. Main Outcome Measures: Prevalent myopic maculopathy. Results: Eighty-one participants had myopic maculopathy (45 diffuse chorioretinal atrophy, 31 patchy chorioretinal atrophy, and 5 macular atrophy). Individuals in the lowest quartile of choroidal thickness had a significantly greater OR for the presence of myopic maculopathy than those in the highest quartile of choroidal thickness (OR: 4.78 [95% CI: 1.78–16.72]) after adjusting for confounders, including axial length. The sensitivity analysis among the 1176 myopic individuals with axial length of ≥ 24.0 mm also showed that thinner choroidal thickness was significantly associated with prevalent myopic maculopathy. Conclusions: The present study demonstrated the significant inverse association between choroidal thickness and the likelihood of myopic maculopathy, suggesting that the measurement of choroidal thickness in addition to axial length would be useful for assessing the risk of myopic maculopathy and elucidating its pathogenesis. Financial Disclosure(s): Proprietary or commercial disclosure may be found after the references.

    DOI: 10.1016/j.xops.2023.100350

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  • 色覚異常の型分類が左右眼で異なった1例 査読

    八尾 睦美, 堀江 宏一郎, 瀬戸 寛子, 藤原 康太, 園田 康平

    日本視能矯正学会プログラム抄録集   64回   69 - 69   2023年11月

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    記述言語:日本語   出版者・発行元:日本視能矯正学会  

  • Differences in Central and Peripheral Choroidal Thickness among the Subtypes of Age-Related Macular Degeneration in an Asian Population 査読

    Fukuda, Y; Notomi, S; Shiose, S; Kano, K; Hashimoto, S; Fujiwara, K; Akiyama, M; Ishikawa, K; Hisatomi, T; Sonoda, KH

    JOURNAL OF CLINICAL MEDICINE   12 ( 16 )   2023年8月   ISSN:2077-0383 eISSN:2077-0383

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    記述言語:英語   出版者・発行元:Journal of Clinical Medicine  

    Age-related macular degeneration (AMD) causes visual impairment in individuals who are >50 years of age. However, no study has investigated AMD when using ultra-wide-field swept-source optical coherence tomography (UWF SS-OCT). We aimed to evaluate central and peripheral choroidal thicknesses using UWF SS-OCT, and to compare these across the AMD subtypes. We included 75 eyes of patients with typical AMD (tAMD), 56 with polypoidal choroidal vasculopathy (PCV), 29 with pachychoroid neovasculopathy (PNV), and 12 with retinal angiomatous proliferation (RAP). To compare choroidal thicknesses in the central and peripheral choroids, we established subfields of <3 mm, <9 mm, and 9–18 mm from the fovea. PNV patients were significantly younger than those with tAMD (p = 0.01). The choroidal thicknesses of PNV were significantly greater than that of tAMD in all subfields (p < 0.01), and choroidal thickness significantly correlated with age and axial length in all subfields (p < 0.05). Even after adjusting for age and axial length, the choroidal thickness in PNV was significantly greater than that in tAMD (p < 0.05). In addition, the ratio of the posterior <9 mm to a peripheral 9–18 mm choroidal thickness in PNV was significantly greater than that in tAMD (p < 0.01). A thickened choroid in PNV was more pronounced in the posterior choroid than in the periphery.

    DOI: 10.3390/jcm12165364

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  • Comparison of Microperimetry and Static Perimetry for Evaluating Macular Function and Disease Progression in Retinitis Pigmentosa

    Fukushima, M; Murakami, Y; Tao, Y; Shimokawa, S; Zhao, H; Shimokawa, S; Funatsu, J; Fujiwara, K; Takeda, A; Ikeda, Y; Sonoda, KH

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   64 ( 8 )   2023年6月   ISSN:0146-0404 eISSN:1552-5783

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  • Natural History and its Association with Inflammatory Markers in Retinitis Pigmentosa: The Protocol of RP PRIMARY Study 査読

    Murakami, Y; Shimokawa, S; Fukushima, M; Hirose, A; Fujiwara, K; Hirata, A; Takada, A; Tokunaga, S; Kobayakawa, Y; Arima, M; Kaida, T; Miyata, K; Mawatari, G; Ishizu, M; Ikeda, Y; Sonoda, KH

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   64 ( 8 )   2023年6月   ISSN:0146-0404 eISSN:1552-5783

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  • Ocular and systemic profiles of inflammatory molecules associated with retinitis pigmentosa 査読

    Tao, Y; Murakami, Y; Fukushima, M; Shimokawa, S; Zhao, HY; Okita, A; Fujiwara, K; Takeda, A; Sonoda, KH

    INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE   64 ( 8 )   2023年6月   ISSN:0146-0404 eISSN:1552-5783

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  • 線維柱帯切開術眼外法と眼内法の術後成績比較 査読

    西田 崇, 下川 翔太郎, 藤原 康太, 小柳 俊人, 村上 祐介, 園田 康平

    あたらしい眼科   40 ( 5 )   693 - 696   2023年5月   ISSN:0910-1810

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    記述言語:日本語   出版者・発行元:(株)メディカル葵出版  

    目的:線維柱帯切開術眼外法(LOT-ext)とマイクロフックを用いた眼内法(LOT-int)の術後2年間の成績を比較した.対象および方法:2017年1月~2018年12月に九州大学病院においてLOT-extおよびLOT-intを白内障手術と同時に行った患者を後ろ向きに抽出し,術後1年以上経過観察できた39例39眼(LOT-ext:20眼,LOT-int:19眼)を対象とした.術後6,12,18,24ヵ月時点での術後眼圧値,および術後合併症の有無について両術式間で比較した.結果:術後の平均眼圧下降値および平均眼圧下降率は術式間で差はなかった.また,生存時間分析でも術後眼圧値は術式間で差はなかった.術後合併症は,LOT-extでニボーを伴う前房出血(p=0.001)および術後1ヵ月以内の眼圧スパイクが有意に多かった(p=0.002).結論:LOT-extとLOT-intの眼圧下降効果に違いはなかった.LOT-extは術後前房出血の頻度および術後眼圧スパイクがLOT-intより多くみられ,術後管理により注意を要する.(著者抄録)

  • Secular trends in the prevalence, incidence, and progression of diabetic retinopathy: the Hisayama Study 査読 国際誌

    Hashimoto S, Yasuda M, Fujiwara K, Ueda E, Nakamura S, Hirakawa Y, Higashioka M, Hata J, Ninomiya T, Sonoda KH.

    Graefes Arch Clin Exp Ophthalmol   2023年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Secular trends in the prevalence, incidence, and progression of diabetic retinopathy: the Hisayama Study 査読

    Hashimoto, S; Yasuda, M; Fujiwara, K; Ueda, E; Nakamura, S; Hirakawa, Y; Higashioka, M; Hata, J; Ninomiya, T; Sonoda, KH

    GRAEFES ARCHIVE FOR CLINICAL AND EXPERIMENTAL OPHTHALMOLOGY   261 ( 3 )   641 - 649   2023年3月   ISSN:0721-832X eISSN:1435-702X

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    記述言語:英語   出版者・発行元:Graefe S Archive for Clinical and Experimental Ophthalmology  

    Purpose: To examine the secular trends in the prevalence, incidence, and progression rates of diabetic retinopathy (DR) in a Japanese community. Methods: Community-dwelling Japanese residents aged ≥ 40 years with diabetes participated in comprehensive systemic and ophthalmological surveys, including an examination for DR, in 1998 (n = 220), 2007 (n = 511), 2012 (n = 515), and 2017 (n = 560). DR was assessed using colour fundus photographs after pupil dilation according to the modified Airlie House classification system. To compare the frequencies of newly developed or progressed DR between the studied decades, two eye cohorts were established (the 2000s cohort included 145 participants examined in 1998 and 2007; the 2010s cohort included 255 participants examined in 2007, 2012, and 2017). Trends in the prevalence, incidence, and progression rate of DR were tested by logistic regression analysis with a generalised estimating equation. Results: The age-adjusted prevalence of DR among individuals with diabetes decreased significantly with time from 1998 to 2017 (27.4% in 1998, 22.8% in 2007, 12.8% in 2012, and 6.4% in 2017; p for trend < 0.001). During this period, the prevalence of DR was decreasing in every haemoglobin A<inf>1c</inf> category, but it remained constant in the high systolic blood pressure category. In addition, the rates of new-onset of DR were significantly lower in the 2010s compared to the 2000s (p < 0.001). Conclusion: Our findings suggest that the prevalence and incidence of DR among diabetic people significantly decreased with time over the past two decades in a general Japanese population.

    DOI: 10.1007/s00417-022-05839-8

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  • Intraocular human cytomegaloviruses of ocular diseases are distinct from those of viremia and are capable of escaping from innate and adaptive immunity by exploiting HLA-E-mediated peripheral and central tolerance (vol 13, 1008220, 2023) 査読

    Shirane, M; Yawata, N; Motooka, D; Shibata, K; Khor, SS; Omae, Y; Kaburaki, T; Yanai, R; Mashimo, H; Yamana, S; Ito, T; Hayashida, A; Mori, Y; Numata, A; Murakami, Y; Fujiwara, K; Ohguro, N; Hosogai, M; Akiyama, M; Hasegawa, E; Paley, M; Takeda, A; Maenaka, K; Akashi, K; Yokoyama, WM; Tokunaga, K; Yawata, M; Sonoda, KH

    FRONTIERS IN IMMUNOLOGY   13   1124440   2023年1月   ISSN:1664-3224

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    記述言語:英語   出版者・発行元:Frontiers in Immunology  

    In the published article, there were errors. In the original article, there was an error in the description of the Reverse primer sequence in Materials and methods. A correction has been made to Materials and methods, “Deep amplicon sequencing of CMV-UL40 genomic DNA”. This sentence previously stated: “The following forward and reverse primers were used:Forward, 5′-TCGTCGGCAGCGTCAGATGTGTATAAGAGACAGCAACAGTCGGCAGAATGAAC-3′ and Reverse, 5′-GTCTCGTGGGCTCGGAGATGTGTATAAGAGACA GCTGGAACACGACGCATA-3’.”The corrected sentence appears below: “The following forward and reverse primers were used: Forward, 5′-TCGTCGGCAGCGTCAGATGTGTATAAGAGACAGCAACAGTCGGCAGAATGAAC-3′ and Reverse, 5′-GTCTCGTGGGCTCGGAGATGTGTATAAGAGAC AGCTGGAACACGAGCGGACATA-3’.”In the original article, there was another error in the description of the concentration of the anti-HLA-E antibody in Materials and methods. A correction has been made to Materials and methods, “Immunohistochemistry analysis”. This sentence previously stated: “After antigen retrieval with boiling citrate buffer (pH 6.0), the sections were incubated with 5% skim milk for 1 h at room temperature to prevent nonspecific binding and stained with 10 mL/mL anti-HLA-E antibody [MEM-E/02] (Abcam; Cambridge, UK) or IgG from mouse serum (Sigma-Aldrich) overnight at 4°C.” The corrected sentence appears below: “After antigen retrieval with boiling citrate buffer (pH 6.0), the sections were incubated with 5% skim milk for 1 h at room temperature to prevent nonspecific binding and stained with 10 mg/mL anti-HLA-E antibody [MEM-E/02] (Abcam; Cambridge, UK) or IgG from mouse serum (Sigma-Aldrich) overnight at 4°C.” The authors apologize for these errors and state that these do not change the scientific conclusions of the article in any way. The original article has been updated.

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  • Prevalence of Glaucoma and Its Systemic Risk Factors in a General Japanese Population: The Hisayama Study. 査読 国際誌

    Fujiwara K, Yasuda M, Hata J, Nakano S, Hashimoto S, Ueda E, Nakamura S, Murakami Y, Nakamuro T, Iwase A, Araie M, Tawara A, Kubota T, Yoshitomi T, Ninomiya T, Sonoda KH.

    Transl Vis Sci Technol   2022年11月

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  • Prevalence of glaucoma and its systemic risk factors in a general Japanese population: The Hisayama Study. 招待 査読 国際誌

    Fujiwara K, Yasuda M, Hata J, Nakano S, Hashimoto S, Ueda E, Nakamura S, Murakami Y, Nakamuro T, Araie M, Tawara A, Kubota T, Yoshitomi T, Ninomiya T, Sonoda KH; Transl Vis Sci Technol.

    Transl Vis Sci Technol   2022年11月

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  • Likely pathogenic structural variants in genetically unsolved patients with retinitis pigmentosa revealed by long-read sequencing 招待 査読 国際誌

    Sano Y, Koyanagi Y, Wong JH, Murakami Y, Fujiwara K, Endo M, Aoi T, Hashimoto K, Nakazawa T, Wada Y, Ueno S, Gao D, Murakami A, Hotta Y, Ikeda Y, Nishiguchi KM, Momozawa Y, Sonoda KH, Akiyama M, Fujimoto A.

    J Med Genet   2022年11月

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  • Likely pathogenic structural variants in genetically unsolved patients with retinitis pigmentosa revealed by long-read sequencing 査読

    Sano, Y; Koyanagi, Y; Wong, JH; Murakami, Y; Fujiwara, K; Endo, M; Aoi, T; Hashimoto, K; Nakazawa, T; Wada, Y; Ueno, S; Gao, D; Murakami, A; Hotta, Y; Ikeda, Y; Nishiguchi, KM; Momozawa, Y; Sonoda, KH; Akiyama, M; Fujimoto, A

    JOURNAL OF MEDICAL GENETICS   59 ( 11 )   1133 - 1138   2022年11月   ISSN:0022-2593 eISSN:1468-6244

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    記述言語:英語   出版者・発行元:Journal of Medical Genetics  

    Despite the successful identification of causative genes and genetic variants of retinitis pigmentosa (RP), many patients have not been molecularly diagnosed. Our recent study using targeted short-read sequencing showed that the proportion of carriers of pathogenic variants in EYS, the cause of autosomal recessive RP, was unexpectedly high in Japanese patients with unsolved RP. This result suggested that causative genetic variants, which are difficult to detect by short-read sequencing, exist in such patients. Using long-read sequencing technology (Oxford Nanopore), we analysed the whole genomes of 15 patients with RP with one heterozygous pathogenic variant in EYS detected in our previous study along with structural variants (SVs) in EYS and another 88 RP-associated genes. Two large exon-overlapping deletions involving six exons were identified in EYS in two patients with unsolved RP. An analysis of an independent patient set (n=1189) suggested that these two deletions are not founder mutations. Our results suggest that searching for SVs by long-read sequencing in genetically unsolved cases benefits the molecular diagnosis of RP.

    DOI: 10.1136/jmedgenet-2022-108428

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  • Intraocular human cytomegaloviruses of ocular diseases are distinct from those of viremia and are capable of escaping from innate and adaptive immunity by exploiting HLA-E-mediated peripheral and central tolerance 査読

    Shirane, M; Yawata, N; Motooka, D; Shibata, K; Khor, SS; Omae, Y; Kaburaki, T; Yanai, R; Mashimo, H; Yamana, S; Ito, T; Hayashida, A; Mori, Y; Numata, A; Murakami, Y; Fujiwara, K; Ohguro, N; Hosogai, M; Akiyama, M; Hasegawa, E; Paley, M; Takeda, A; Maenaka, K; Akashi, K; Yokoyama, WM; Tokunaga, K; Yawata, M; Sonoda, KH

    FRONTIERS IN IMMUNOLOGY   13   1008220   2022年10月   ISSN:1664-3224

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    記述言語:英語   出版者・発行元:Frontiers in Immunology  

    Human cytomegalovirus (HCMV) infections develop into CMV diseases that result in various forms of manifestations in local organs. CMV-retinitis is a form of CMV disease that develops in immunocompromised hosts with CMV-viremia after viruses in the peripheral circulation have entered the eye. In the HCMV genome, extensive diversification of the UL40 gene has produced peptide sequences that modulate NK cell effector functions when loaded onto HLA-E and are subsequently recognized by the NKG2A and NKG2C receptors. Notably, some HCMV strains carry UL40 genes that encode peptide sequences identical to the signal peptide sequences of specific HLA-A and HLA-C allotypes, which enables these CMV strains to escape HLA-E-restricted CD8<sup>+</sup>T cell responses. Variations in UL40 sequences have been studied mainly in the peripheral blood of CMV-viremia cases. In this study, we sought to investigate how ocular CMV disease develops from CMV infections. CMV gene sequences were compared between the intraocular fluids and peripheral blood of 77 clinical cases. UL40 signal peptide sequences were more diverse, and multiple sequences were typically present in CMV-viremia blood compared to intraocular fluid. Significantly stronger NK cell suppression was induced by UL40-derived peptides from intraocular HCMV compared to those identified only in peripheral blood. HCMV present in intraocular fluids were limited to those carrying a UL40 peptide sequence corresponding to the leader peptide sequence of the host’s HLA class I, while UL40-derived peptides from HCMV found only in the peripheral blood were disparate from any HLA class I allotype. Overall, our analyses of CMV-retinitis inferred that specific HCMV strains with UL40 signal sequences matching the host’s HLA signal peptide sequences were those that crossed the blood–ocular barrier to enter the intraocular space. UL40 peptide repertoires were the same in the intraocular fluids of all ocular CMV diseases, regardless of host immune status, implying that virus type is likely to be a common determinant in ocular CMV disease development. We thus propose a mechanism for ocular CMV disease development, in which particular HCMV types in the blood exploit peripheral and central HLA-E-mediated tolerance mechanisms and, thus, escape the antivirus responses of both innate and adaptive immunity.

    DOI: 10.3389/fimmu.2022.1008220

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  • Intraocular human cytomegaloviruses of ocular diseases are distinct from those of viremia and are capable of escaping from innate and adaptive immunity by exploiting HLA-E-mediated peripheral and central tolerance. 招待 査読 国際誌

    Shirane M, Yawata N, Motooka D, Shibata K, Khor SS, Omae Y, Kaburaki T, Yanai R, Mashimo H, Yamana S, Ito T, Hayashida A, Mori Y, Numata A, Murakami Y, Fujiwara K, Ohguro N, Hosogai M, Akiyama M, Hasegawa E, Paley M, Takeda A, Maenaka K, Akashi K, Yokoyama WM, Tokunaga K, Yawata M, Sonoda KH.

    Front Immunol   2022年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Association between body mass index and diabetic retinopathy in Asians: the Asian Eye Epidemiology Consortium (AEEC) study 招待 査読 国際誌

    Sabanayagam C, Sultana R, Banu R, Rim T, Tham YC, Mohan S, Chee ML, Wang YX, Nangia V, Fujiwara K, Tai ES, Song SJ, Bikbov MM, Raman R, Cheng CY, Wong TY, Jonas JB.

    Br J Ophthalmol   2022年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Association between body mass index and diabetic retinopathy in Asians: the Asian Eye Epidemiology Consortium (AEEC) study 査読

    Sabanayagam, C; Sultana, R; Banu, R; Rim, T; Tham, YC; Mohan, S; Li Chee, M; Wang, YX; Nangia, V; Fujiwara, K; Tai, ES; Song, SJ; Bikbov, MM; Raman, R; Cheng, CY; Wong, TY; Jonas, JB

    BRITISH JOURNAL OF OPHTHALMOLOGY   106 ( 7 )   980 - 986   2022年7月   ISSN:0007-1161 eISSN:1468-2079

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    記述言語:英語   出版者・発行元:British Journal of Ophthalmology  

    Background/aims Obesity is a well-known risk factor for diabetes, but its association with diabetic retinopathy (DR) is inconclusive, in particular in Asians. We aimed to assess whether body mass index (BMI) is associated with the presence and severity of DR in Asian populations with diabetes. Methods Pooled analysis of individual-level cross-sectional data from 10 010 adults with diabetes who participated in 12 population-based studies conducted in China, India, Japan, Russia (Asian), Singapore and South Korea that were part of the Asian Eye Epidemiology Consortium (AEEC). BMI was calculated as weight in kilograms divided by height in square metres and categorised into normal (<25 kg/m 2, reference), overweight (25-29.9 kg/m 2) and obese (≥30 kg/m 2). Any-DR (n=1669) and vision-threatening DR (VTDR, n=489) were assessed from digital retinal photographs and graded according to standard protocols. Each study was analysed separately using multivariable logistic regression models adjusted for age, sex, haemoglobin A1c%, systolic blood pressure and diabetes duration, and the estimated odds ratios (ORs) and 95% confidence interval (CIs) from all studies were then combined using random-effects models. Results In multivariable models, obesity showed a significant inverse association with any-DR (pooled OR (95% CI) =0.74 (0.59 to 0.91)) and VTDR (0.75 (0.60 to 0.93)). Similarly, in continuous analysis, BMI showed a significant inverse association with both any-DR (0.93 (0.87 to 0.99)) and VTDR (0.79 (0.68 to 0.92) per SD increase). Overweight did not show a significant association with any-DR. Conclusions Among Asian adults with diabetes, both BMI and obesity showed an inverse association with DR. These findings warrant confirmation in further longitudinal studies.

    DOI: 10.1136/bjophthalmol-2020-318208

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  • Association of Inner Retinal Thickness with Prevalent Dementia and Brain Atrophy in a General Older Population

    Ueda, E; Hirabayashi, N; Ohara, T; Hata, J; Honda, T; Fujiwara, K; Furuta, Y; Shibata, M; Hashimoto, S; Nakamura, S; Nakazawa, T; Nakao, T; Kitazono, T; Ninomiya, T; Sonoda, KH

    OPHTHALMOLOGY SCIENCE   2 ( 2 )   100157   2022年6月   ISSN:2666-9145

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    記述言語:英語   出版者・発行元:Ophthalmology Science  

    Purpose: To assess the association of inner retinal thickness with prevalent dementia and regional brain atrophy in a general older population of Japanese. Design: Population-based, cross-sectional study. Participants: A total of 1078 residents aged 65 years or older who participated in an eye examination, a comprehensive survey of dementia, and brain magnetic resonance imaging scanning in 2017. Methods: The thicknesses of the inner retinal layers, namely, the ganglion cell-inner plexiform layer (GC-IPL) and retinal nerve fiber layer (RNFL)—were measured by swept-source OCT (SS-OCT). The association of these retinal thicknesses with the risk of the presence of dementia was estimated using restricted cubic splines and logistic regression models. Regional brain volumes were estimated separately by applying 2 different methods: voxel-based morphometry (VBM) and analysis by FreeSurfer software. The associations of GC-IPL and RNFL thickness with each brain regional volume were analyzed using multiple regression analysis. Main Outcome Measure: Prevalent dementia and regional brain atrophy. Results: Among the study participants, 61 participants (5.7%) were diagnosed with dementia. The likelihood of the presence of dementia significantly increased with lower GC-IPL thickness after adjusting for potential confounders (odds ratio, 1.62 [95% confidence interval, 1.30–2.01] per 1 standard deviation decrement in the GC-IPL thickness), but no significant association was observed with RNFL thickness. In the VBM analyses with the multivariable adjustment, lower GC-IPL thickness was significantly associated with lower volume of known brain regions related to cognitive functions (i.e., the hippocampus, amygdala, entorhinal area, and parahippocampal gyrus) and visual functions (i.e., the cuneus, lingual gyrus, and thalamus). Meanwhile, the volume of the thalamus significantly decreased with lower RNFL thickness, but none of the brain regions related to cognitive function exhibited a volume change in association with RNFL thickness. The sensitivity analysis using FreeSurfer analysis also showed that lower GC-IPL thickness was significantly associated with lower regional brain volume/intracranial volume of the hippocampus, amygdala, cuneus, lingual gyrus, and thalamus. Conclusions: Our findings suggest that the measurement of GC-IPL thickness by SS-OCT, which is a noninvasive, convenient, and reproducible method, might be useful for identifying high-risk individuals with dementia.

    DOI: 10.1016/j.xops.2022.100157

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  • Long-term Outcomes of Cataract Surgery in Patients with Retinitis Pigmentosa 招待 査読 国際誌

    Nakamura S, Fujiwara K, Yoshida N, Murakami Y, Shimokawa S, Koyanagi Y, Ikeda Y, Sonoda KH.

    Ophthalmol Retina   2022年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Association of Inner Retinal Thickness with Prevalent Dementia and Brain Atrophy in a General Older Population: The Hisayama Study. 招待 査読 国際誌

    Ueda E, Hirabayashi N, Ohara T, Hata J, Honda T, Fujiwara K, Furuta Y, Shibata M, Hashimoto S, Nakamura S, Nakazawa T, Nakao T, Kitazono T, Ninomiya T, Sonoda KH.

    Ophthalmol Sci   2022年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Long-term Outcomes of Cataract Surgery in Patients with Retinitis Pigmentosa 査読

    Nakamura, S; Fujiwara, K; Yoshida, N; Murakami, Y; Shimokawa, S; Koyanagi, Y; Ikeda, Y; Sonoda, KH

    OPHTHALMOLOGY RETINA   6 ( 4 )   268 - 272   2022年4月   ISSN:2468-6530

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    記述言語:英語   出版者・発行元:Ophthalmology Retina  

    Purpose: To investigate the long-term outcomes of cataract surgery in patients with retinitis pigmentosa (RP). Design: Retrospective, observational study. Participants: Sixty-four patients with typical RP (22 men, 42 women; average age, 62.8 ± 10.1 years) who underwent cataract surgery at Kyushu University Hospital between May 2007 and October 2015 and were followed up for ≥3 years after the surgery. Methods: Differences between presurgery and postsurgery visual function, including best-corrected visual acuity (BCVA) and parameters in the Humphrey field analyzer (HFA) examination using the central 10-2 program, were investigated. The presurgery conditions of the foveal ellipsoid zone (EZ) were classified into 3 grades (grade 1: invisible; grade 2: abnormal; grade 3: normal) based on OCT findings. Main Outcome Measures: BCVA, the retinal sensitivity in the HFA 10-2 test. Results: Cataract surgery was performed in 96 eyes, with an average follow-up period of 5.8 ± 2.4 years. The mean presurgery BCVA was 0.64 ± 0.52 logarithm of the minimum angle of resolution (logMAR), and the final postsurgery BCVA was 0.61 ± 0.67 logMAR (P = 0.57). Significant improvement in the postsurgery BCVA was observed only in eyes with preserved foveal EZ (grade 3) (P < 0.01). In 62 eyes of 45 patients who underwent the HFA 10-2 test, the mean values of deviation, macular sensitivity, and foveal sensitivity at the final visit were significantly decreased compared with preoperative values (P < 0.01), whereas those in grade 3 eyes did not change significantly after the surgery (P = 0.13). Conclusions: In the long-term course after cataract surgery in patients with RP, many patients experienced vision loss with progression of the disease. The preoperative finding of preserved foveal EZ was associated with a better visual prognosis, suggesting that EZ evaluation is useful for predicting the long-term visual outcome of cataract surgery in patients with RP.

    DOI: 10.1016/j.oret.2021.12.010

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  • Circulating inflammatory monocytes oppose microglia and contribute to cone cell death in retinitis pigmentosa. 招待 査読 国際誌

    Funatsu J, Murakami Y, Shimokawa S, Nakatake S, Fujiwara K, Okita A, Fukushima M, Shibata K, Yoshida N, Koyanagi Y, Akiyama M, Notomi S, Nakao S, Hisatomi T, Takeda A, Paschalis EI, Vavvas DG, Ikeda Y, Sonoda KH.

    PNAS Nexus   2022年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Recurrence rate of cystoid macular edema with topical dorzolamide treatment and its risk factors in retinitis pigmentosa 査読

    Shimokawa S., Murakami Y., Fujiwara K., Funatsu J., Nakatake S., Koyanagi Y., Akiyama M., Yoshida N., Takeda A., Ikeda Y., Sonoda K.H.

    Retina   42 ( 1 )   168 - 173   2022年1月   ISSN:0275004X

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    記述言語:英語   出版者・発行元:Retina  

    Purpose: To investigate the rate of the recurrence of cystoid macular edema (CME) secondary to retinitis pigmentosa (RP) after the initiation of topical dorzolamide and the recurrence risk factors. Methods: We retrospectively analyzed the data of RP patients at Kyushu University Hospital. We included patients who showed a treatment response to 1.0% topical dorzolamide. The day of treatment initiation was set as the baseline. Topical dorzolamide treatment was continued during the follow-up. The recurrence of CME (defined as a .20% increase in central subfield thickness compared to previous visit, or a central subfield thickness value that exceed baseline value) was evaluated at each follow-up visit. Risk factors for RP-CME recurrence were analyzed by Cox proportional hazards modeling. A Kaplan–Meier survival analysis was used to evaluate the time to recurrent RP-CME. Results: Forty RP-CME patients showed a treatment response to topical dorzolamide. During the mean 3.9-year follow-up, 14 patients exhibited recurrence; its rate was 15.6%, 34.7%, and 48.7% at 1, 3, and 5 years, respectively. A high baseline central subfield thickness was significantly associated with recurrent (hazard ratio 1.11, 95% CI: 1.05–1.18, P = 0.0004). Conclusion: The recurrence rate of RP-CME increased with time. A high baseline central subfield thickness value was a risk factor for recurrence.

    DOI: 10.1097/IAE.0000000000003286

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  • Recurrence rate of cystoid macular edema with topical dorzolamide treatment and its risk factors in retinitis pigmentosa 招待 査読 国際誌

    Shimokawa S, Murakami Y, Fujiwara K, Funatsu J, Nakatake S, Koyanagi Y, Akiyama M, Yoshida N, Takeda A, Ikeda Y, Sonoda KH.

    Retina   2022年1月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  • RECURRENCE RATE OF CYSTOID MACULAR EDEMA WITH TOPICAL DORZOLAMIDE TREATMENT AND ITS RISK FACTORS IN RETINITIS PIGMENTOSA 査読

    Shimokawa, S; Murakami, Y; Fujiwara, K; Funatsu, J; Nakatake, S; Koyanagi, Y; Akiyama, M; Yoshida, N; Takeda, A; Ikeda, Y; Sonoda, KH

    RETINA-THE JOURNAL OF RETINAL AND VITREOUS DISEASES   42 ( 1 )   168 - 173   2022年1月   ISSN:0275-004X eISSN:1539-2864

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  • Genotype and Long-term Clinical Course of Bietti Crystalline Dystrophy in Korean and Japanese Patients 招待 査読 国際誌

    Murakami Y, Koyanagi Y, Fukushima M, Yoshimura M, Fujiwara K, Akiyama M, Momozawa Y, Ueno S, Terasaki H, Oishi A, Miyata M, Ikeda H, Tsujikawa A, Mizobuchi K, Hayashi T, Fujinami K, Tsunoda K, Park JY, Han J, Kim M, Lee CS, Kim SJ, Park TK, Joo K, Woo SJ, Ikeda Y, Sonoda KH.

    Ophthalmol Retina   2021年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  • Risk factors for myopia at 1-year corrected age following laser photocoagulation for retinopathy of prematurity 招待 査読 国際誌

    Mori Y, Arima M, Ueda E, Fujiwara K, Seki E, Nakama T, Tsukamoto S, Akiyama M, Sonoda KH.

    Eye (Lond)   2021年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  • Diabetic vascular hyperpermeability: optical coherence tomography angiography and functional loss assessments of relationships among retinal vasculature changes 招待 査読 国際誌

    Arima M, Nakao S, Kaizu Y, Wada I, Yamaguchi M, Fujiwara K, Akiyama M, Stitt AW, Sonoda KH.

    Sci Rep   2021年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

▼全件表示

書籍等出版物

  • 緑内障疫学調査

    藤原康太

    2022年4月 

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    記述言語:日本語  

講演・口頭発表等

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MISC

  • 炎症・感染とこれからの眼科診療 眼炎症疾患におけるアンメットニーズへの挑戦

    武田 篤信, 八幡 信代, 石川 桂二郎, 秋山 雅人, 長谷川 英一, 伊東 崇子, 村上 祐介, 納富 昭司, 藤原 康太, 吉富 景子, 村田 千博, 浅原 健一郎, 白根 茉利子, 山名 智志, 福田 洋輔, 下川 桜子, 園田 康平, 久冨 智朗, 中尾 新太郎, 柴田 健輔, 木村 和博, 柿原 伸次, 村田 敏規, 清水 誠之, 花田 俊勝, 滝澤 仁, 清田 章文, 後藤 浩, 臼井 嘉彦, 片岡 圭亮, 古屋 淳史, 湯浅 光博, 小田 義直, 赤司 浩一, 加藤 光次, 仙波 雄一郎, 前田 高宏

    日本眼科学会雑誌   128 ( 3 )   216 - 233   2024年3月   ISSN:0029-0203

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    記述言語:日本語   出版者・発行元:(公財)日本眼科学会  

    分子生物学的手法や検査機器の開発といった技術革新により,ポリメラーゼ連鎖反応法を用いた眼内液中の網羅的病原体遺伝子解析,ゲノム解析による発症や進行予測など,診断・活動性評価法の発展が目覚ましい.また,抗tumor necrosis factor(TNF)α阻害薬や抗vascular endothelial growth factor(VEGF)薬療法に代表される生物学的製剤の登場により治療のパラダイムシフトが生じ,有効な治療法がなく,光覚を維持することすら難しかった難治性眼疾患患者に,文字どおり光を与えることが可能になってきている.しかし,これらの診断,治療法の進歩にもかかわらず依然として課題が残されている.近年,個人の臨床情報の蓄積と,ゲノム情報,遺伝子発現(トランスクリプトーム),蛋白質発現(プロテオーム)などの網羅的な解析技術の発展により,効果的な薬剤選択,再発・予後予測など,個別化医療あるいは精密医療の実現が近づきつつある.我々の研究グループでは,(1)ぶどう膜炎の視力障害の原因第1位である黄斑浮腫,(2)ウイルスが原因となるぶどう膜炎の代表的眼疾患である急性網膜壊死(ARN)とhuman T-cell lymphotropicvirus type 1(HTLV-1)関連ぶどう膜炎(HAU),(3)眼疾患のなかで最も生命予後不良な硝子体網膜リンパ腫(VRL)の3疾患を,眼炎症,感染症疾患における臨床的重要課題と位置づけている.本稿では,これら3疾患を中心に,基礎研究ではヒト眼内液を用いた遺伝子や蛋白質などの網羅的解析,臨床研究では臨床データを用いた統計学的解析による視力予後予測などを中心に,その研究成果について報告する.I.ぶどう膜炎黄斑浮腫(UME)に対する新規治療標的の探索についてUMEは,当初は副腎皮質ステロイド治療に反応していても長期的には副腎皮質ステロイド治療抵抗性や副作用により難治性となる.抗TNF阻害薬療法に対し治療効果のない症例もあり,新規治療法の開発が求められている.我々はぶどう膜炎患者由来眼内液中のサイトカイン・ケモカインなどの催炎症因子を網羅的に解析し,UMEの新規標的因子を探索した.サルコイドーシス・Behcet病に伴う黄斑浮腫では,B-cell activating factor belonging to the TNF family(BAFF)の硝子体液中の濃度が高値であることを見出した.分子生物学的手法を用いたBAFFの機能解析結果から,BAFFのUMEへの関連について報告する.II.ARNに対する視力予後とHAUの病態解明ARNはその激烈な転帰のため視力予後が不良となる代表的な眼疾患である.今回,九州大学病院眼科の臨床データを用いて,ARNの初診時臨床所見から視力予後予測を行った.さらに視力予後予測式の構築の試みについて報告する.また,HAUの病態はCD4陽性T細胞が主体であるとされているが,CD8陽性T細胞でもHAUと類似した病態が生じる可能性について報告する.III.VRLの病態制御機構の解明と遺伝子パネルによる診断について近年,罹患数が増加しているVRLは発症後高率に中枢神経系(CNS)へ浸潤し,生命予後が不良とされている.CNS浸潤予防目的のメトトレキサートを基盤とする化学療法は予後改善に有効との報告はあるが,我々の4年以上の長期経過観察が可能であった症例の全生存解析の結果から,化学療法を施行しても短期間でCNSに浸潤し予後不良な症例があることを見出した.また,我々はVRL由来硝子体液中の催炎症因子の網羅的解析により,早期死亡例で制御性T細胞(Treg)の分化・増殖に関連するサイトカインであるインターロイキン(IL)-35の濃度上昇を見出した.さらに眼内液の遺伝子パネルを用いたVRL診断,治療薬の候補の提示についての試みを報告する.(著者抄録)

  • 久山町研究における緑内障疫学調査の実際. 臨床眼科

    藤原 康太, 中野 聡子, 園田 康平

    2022年4月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  • 久山町研究における緑内障疫学調査の実際

    藤原 康太, 中野 聡子, 園田 康平

    臨床眼科   76 ( 1 )   10 - 14   2022年1月   ISSN:0370-5579

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    記述言語:日本語   出版者・発行元:(株)医学書院  

    <文献概要>緑内障の有病率は加齢に伴い上昇し,今後さらに緑内障患者が増加することが懸念される。近年では,画像技術の進歩により新規機器を用いた緑内障疫学調査も行われるようになっている。緑内障の実態把握,病態解明のためにも大規模な疫学調査による疫学エビデンスの構築が必要とされる。

  • 耐糖能異常と乳頭周囲網膜神経線維層厚の関連 査読

    藤原康太

    2021年4月

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    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

所属学協会

  • 日本眼科学会

  • 日本緑内障学会

  • 日本網膜硝子体学会

共同研究・競争的資金等の研究課題

  • 失明回避を目指す開放隅角緑内障の遺伝的リスク予測に関する研究開発

    2023年5月

  • 前向きコホート研究に基づいたOCT緑内障発症リスク予測モデルの開発

    2023年 - 2025年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

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    資金種別:科研費

  • 前向きコホート研究に基づいたOCT緑内障発症リスク予測モデルの開発

    研究課題/領域番号:23K09060  2023年 - 2025年

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    藤原 康太, 園田 康平, 二宮 利治, 上田 瑛美

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    担当区分:研究代表者  資金種別:科研費

    高齢化が進む現代において緑内障の有病率は増加しており(2017年久山町研究)、緑内障による失明者もますます増加することが懸念されている。この社会課題を克服するためには、緑内障発症リスクの高い患者を事前に発見し、早期に治療介入することが必要である。本研究では地域一般住民を対象としてOCTを活用した緑内障の追跡調査を実施し、OCTから得られる網羅的眼データと網羅的全身因子データを合わせて緑内障発症率との関連を解析することで、緑内障発症リスク予測モデルを確立する。本研究成績から緑内障を未病で発見し、より早期からの高リスク群の同定が可能となり、失明防止に貢献することが期待できる

    CiNii Research

  • 病的近視発症リスク予測モデルの開発に向けた前向きコホート研究

    研究課題/領域番号:22K09767  2022年4月 - 2025年3月

    科学研究費助成事業  基盤研究(C)

    安田 美穂, 園田 康平, 二宮 利治, 上田 瑛美, 藤原 康太

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    資金種別:科研費

    病的近視は、わが国の失明原因の上位を占め、網膜の変性により進行性の視覚障害をきたす疾患である。しかしながら、病的近視が発症する要因については十分に解明されていない。病的近視発症には全身因子・遺伝因子・環境因子が複雑に絡み合っていると考えられる。病的近視の増加に歯止めをかけ、その予防を含めた総合的な対策を構築するためには、疫学研究によって地域住民における病的近視の実態を把握し、危険因子・防御因子を同定することは必要不可欠である。本研究では日本人の病的近視に関わる眼科的因子、全身因子、遺伝因子を明らかにし、病的近視発症リスク予測モデルを確立する。

    CiNii Research

  • 前視野緑内障の予防法構築に向けた疫学エビデンスの確立:久山町研究

    研究課題/領域番号:21K16877  2021年4月 - 2023年3月

    科学研究費助成事業  若手研究

    藤原 康太

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    資金種別:科研費

    近年、画像技術の進歩とともに、光干渉断層計(OCT)を用いた視神経乳頭解析や網膜構造解析が進み広く用いられている。緑内障の構造異常は視野異常に先行し前視野緑内障(Preperimetric glaucoma: PPG)として定義される。そのためPPG の有病率や危険因子の解明は、早期の緑内障の発見や治療介入に直結することは明白である。しかしながら、PPG の有病率や発症率、関連因子を検討したものはこれまでにない。そこで本研究では、わが国初のPPG 有病率・発症率ならびにその関連因子を明らかにする。本研究結果は、緑内障の早期診断・治療を啓蒙する上で、重要な医学的エビデンスとなることが期待される。

    CiNii Research

  • 前視野緑内障の予防法構築に向けた疫学エビデンスの確立:久山町研究

    2021年 - 2022年

    日本学術振興会  科学研究費助成事業  若手研究

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    資金種別:科研費

  • 緑内障発症・進行リスクスコアの確立と個別化医療の基盤作成

    2018年 - 2020年

    日本学術振興会  科学研究費助成事業  若手研究

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    資金種別:科研費

▼全件表示

教育活動概要

  • 4年生学生講義、5年生実習担当、6年生実習担当

担当授業科目

  • 眼科治療総論

    2025年4月  

  • 眼科治療総論

    2023年4月 - 2023年9月   前期

その他部局等における各種委員・役職等

  • 2023年4月 - 現在   その他 教官会代議員

専門診療領域

  • 生物系/医歯薬学/外科系臨床医学/眼科学

医師免許取得年

  • 2010年