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Toshiya Abe Last modified date:2023.06.20

Assistant Professor / Department of Surgery and Oncology,Graduate School of Medical Sciences, Kyushu University
Pancreatobiliary Surgery, Kidney and Pancreas Transplantation
Kyushu University Hospital

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Academic Degree
Doctor of Philosophy
Country of degree conferring institution (Overseas)
Field of Specialization
Hepato-Biliary-Pancreatic Surgery
Total Priod of education and research career in the foreign country
Academic Activities
1. Haruyoshi Tanaka, Koji Tamura, Toshiya Abe, Takeichi Yoshida, Anne Macgregor-Das, Mohamad Dbouk, Amanda L. Blackford, Michael Borges, Anne Marie Lennon, Jin He, Richard Burkhart, Marcia Irene Canto, Michael Goggins, Serum Carboxypeptidase Activity and Genotype-Stratified CA19-9 to Detect Early-Stage Pancreatic Cancer, Clin Gastroenterol Hepatol., 10.1016/j.cgh.2021.10.008., 2021.10, Abstract

Background and aims: Serum diagnostic markers of early-stage pancreatic ductal adenocarcinoma (PDAC) are needed, especially for stage I disease. As tumors grow and cause pancreatic atrophy, markers derived from pancreatic parenchyma such as serum carboxypeptidase A (CPA) activity lose diagnostic performance. We evaluated, with CA19-9, serum CPA as a marker of early pancreatic cancer.

Methods: Serum CPA activity levels were measured in 345 controls undergoing pancreatic surveillance, divided into 2 sets, set 1 being used to establish a reference range. Variants within the CPA1 locus were sought for their association with pancreatic CPA1 expression to determine if such variants associated with serum CPA levels. A total of 190 patients with resectable PDAC were evaluated.

Results: Among controls, those having 1 or more minor alleles of CPA1 variants rs6955723 or rs2284682 had significantly higher serum CPA levels than did those without (P = .001). None of the PDAC cases with pancreatic atrophy had an elevated CPA. Among 122 PDAC cases without atrophy, defining serum CPA diagnostic cutoffs by a subject's CPA1 variants yielded a diagnostic sensitivity of 18% at 99% specificity (95% confidence interval [CI], 11.7-26) (vs 11.1% sensitivity using a uniform diagnostic cutoff); combining CPA with variant-stratified CA19-9 yielded a sensitivity of 68.0% (95% CI, 59.0-76.2) vs 63.1% (95% CI, 53.9- 71.7) for CA19-9 alone; and among stage I PDAC cases, diagnostic sensitivity was 51.9% (95% CI, 31.9-71.3) vs 37.0% (95% CI, 19.4-57.6) for CA19-9 alone. In the validation control set, the variant-stratified diagnostic cutoff yielded a specificity of 98.2%.

Conclusion: Serum CPA activity has diagnostic utility before the emergence of pancreatic atrophy as a marker of localized PDAC, including stage I disease..
2. Abe T, Ohuchida K, Miyasaka Y, Ohtsuka T, Oda Y, Nakamura M, Comparison of Surgical Outcomes Between Radical Antegrade Modular Pancreatosplenectomy (RAMPS) and Standard Retrograde Pancreatosplenectomy (SPRS) for Left-Sided Pancreatic Cancer, World J Surg, 10.1007/s00268-016-3526-x, 40, 9, 2267-75, 2016.04, BACKGROUND: Radical antegrade modular pancreatosplenectomy (RAMPS) is a modification of standard retrograde pancreatosplenectomy (SRPS) used to achieve the dissection of N1 lymph nodes, early vascular control, and negative posterior margins. However, there have been few comparative studies regarding the clinical outcomes of the RAMPS and SRPS procedures.METHODS: Ninety-three patients underwent distal pancreatectomy for the treatment of pancreas body and tail adenocarcinoma between 2000 and 2014. Clinicopathologic data were retrospectively analyzed in this study. We compared short- and long-term outcomes between RAMPS and SRPS. In addition, we investigated the significance of clinicopathologic factors in left-sided pancreatic cancers.RESULTS: Fifty-three patients underwent RAMPS and 40 patients underwent SRPS. RAMPS revealed a larger number of retrieved lymph nodes [28.4 ± 11.6 vs 20.7 ± 10.1; P = 0.0016], more frequent R0 resection [90.5 vs 67.5
%; P = 0.0053], less intraoperative bleeding than SRPS [485.4 ± 63.3 vs 682.3 ± 72.8 ml; P = 0.0444], and shorter operating time (267.3 ± 11.5 vs 339.4 ± 13.2 min; P < 0.0001) as compared with SRPS. In comparing RAMPS and SRPS, RAMPS showed a tendency for improvement of the median survival times than SRPS (47 vs 34 months) (P = 0.1920). In the multivariate analysis, R1 resection, histologic grade, and vascular invasion for overall survival (OS) were found to be independent factors.CONCLUSIONS: There were a decrease of intraoperative bleeding and an increase in the number of retrieved lymph nodes and the R0 resection rate using RAMPS as compared with SRPS..
3. Abe T, Ohuchida K, Endo S, Ookubo F, Mori Y, Nakata K, Miyasaka Y, Manabe T, Ohtsuka T, Nagai E, Oda Y, Nakamura M, Clinical importance of intraoperative peritoneal cytology in patients with pancreatic cancer, Surgery, 161, 4, 951-958, 2017.04, BACKGROUND:The clinical importance of intraoperative peritoneal cytology in patients with pancreatic cancer remains incompletely understood.METHODS:Peritoneal washing samples were collected from 411 consecutive patients with pancreatic ductal adenocarcinoma from 1996 to 2014. Of the 411 patients, 335 underwent macroscopically curative resection and 76 with noncurative factors did not undergo resection. We compared long-term outcomes between patients with positive cytology (cytology+) and those with negative cytology (cytology-) and investigated the importance of clinicopathologic factors.RESULTS:Of 335 patients with curative resection, 300 (89.6%) were cytology- and 35 (10.4%) were cytology+. The median overall survival of cytology+ patients was less than that of cytology- patients (16 vs 31 months, respectively; P < .0001). The median overall survival of cytology+ patients with noncurative factors was significantly worse than that of cytology+ pat
ients with curative resection (6.9 vs 16.0 months, respectively; P = .0023). The median disease-free survival of cytology+ patients was less than that of cytology- patients (6.5 vs 16 months, respectively; P < .0001). In the multivariate analysis, cytology+ was an independent prognostic factor for overall survival and disease-free survival.CONCLUSION:Cytology+ without noncurative factors was a predictive factor for a poor prognosis. Therefore, it is important to regard patients with pancreatic cancer characterized by cytology+ as a special group that may warrant more aggressive adjuvant therapy..
4. Abe T, Ohuchida K, Koikawa K, Endo S, Okumura T, Sada M, Horioka K, Zheng B, Moriyama T, Nakata K, Miyasaka Y, Manabe T, Ohtsuka T, Nagai E, Mizumoto K, Hashizume M, Nakamura M, Cancer-associated peritoneal mesothelial cells lead the formation of pancreatic cancer peritoneal dissemination, Int J Oncol, 50, 2, 457-467, 2017.04, The interaction between the cancer cells and the peritoneal mesothelial cells (PMCs) plays an important role in the peritoneal dissemination in several types of cancer. However, the role of PMCs in the peritoneal dissemination of pancreatic cancer remains unclear. In the present study, we investigated the interaction between the pancreatic cancer cells (PCCs) and the PMCs in the formation of peritoneal dissemination in vitro and in vivo. The tumor-stromal interaction of PCCs and PMCs significantly enhanced their mobility and invasiveness and enhanced the proliferation and anoikis resistance of PCCs. In a 3D organotypic culture model of peritoneal dissemination, co-culture of PCCs and PMCs significantly increased the cells invading into the collagen gel layer compared with mono-culture of PCCs. PMCs pre-invaded into the collagen gel, remodeled collagen fibers, and increased parallel fiber orientation along the direction of cell invasion. In the tissues
of peritoneal dissemination of the KPC (LSL-KrasG12D/+; LSL-Trp53R172H/+;Pdx-1-Cre) transgenic mouse, the monolayer of PMCs was preserved in tumor-free areas, whereas PMCs around the invasive front of peritoneal dissemination proliferated and invaded into the muscle layer. In vivo, intraperitoneal injection of PCCs with PMCs significantly promoted peritoneal dissemination compared with PCCs alone. The present data suggest that the cancer-associated PMCs have important promoting roles in the peritoneal dissemination of PCCs. Therapy targeting cancer-associated PMCs may improve the prognosis of patients with pancreatic cancer..
5. Abe T, Nakata K, Kibe S, Mori Y, Miyasaka Y, Ohuchida K, Ohtsuka T, Oda Y, Nakamura M, Prognostic Value of Preoperative Nutritional and Immunological Factors in Patients with Pancreatic Ductal Adenocarcinoma, Ann Surg Oncol, 10.1245/s10434-018-6761-6, 25, 13, 3996-4003, 2018.04.
6. Abe T, Blackford AL, Tamura K, Ford M, McCormick P, Chuidian M, Almario JA, Borges M, Lennon AM, Shin EJ, Klein AP, Hruban RH, Canto MI, Goggins M, Deleterious Germline Mutations Are a Risk Factor for Neoplastic Progression Among High-Risk Individuals Undergoing Pancreatic Surveillance, J Clin Oncol, 10.1200/JCO.18.01512. Epub 2019 Mar 18., 37, 13, 1070-1080, 2019.04, Purpose: To compare the risk of neoplastic progression by germline mutation status versus family history without a known germline mutation (familial risk) among individuals with an increased risk for pancreatic cancer who are undergoing surveillance.

Methods: Of 464 high-risk individuals in the Cancer of the Pancreas Screening program at Johns Hopkins Hospital who were undergoing pancreatic surveillance, 119 had a known deleterious germline mutation in a pancreatic cancer susceptibility gene; 345 met family history criteria for pancreatic surveillance but were not known to harbor a germline mutation. We used next-generation sequencing to identify previously unrecognized germline mutations among these 345 individuals. We compared the development of pancreatic cancer, high-grade dysplasia, or clinically worrisome features, adjusting for competing mortality, among all germline mutation carriers with the risk of progression in a cohort without a known germline mutation.

Results: Fifteen (4.3%) of 345 individuals classified as having familial risk had a previously unrecognized pancreatic cancer susceptibility gene mutation (nine that involved ATM, two BRCA2, one BRCA1, one PALB2, one TP53, and one CPA1). The cumulative incidence of pancreatic cancer, high-grade dysplasia, or worrisome features on pancreatic imaging was significantly higher in the germline mutation risk group (n = 134) than in the familial risk group (n = 330 [for pancreatic cancer, hazard ratio, 2.85; 95% CI, 1.0 to 8.18; P = .05]).

Conclusion: The cumulative incidence of pancreatic cancer is significantly higher among individuals with an identifiable deleterious germline mutation in a pancreatic cancer susceptibility gene than it is among individuals with a strong family history but no identified mutation. Gene testing of individuals who meet criteria for pancreatic surveillance on the basis of their family history may better define those most at risk for neoplastic progression..
7. Abe T, Koi C, Kohi S, Song KB, Tamura K, Macgregor-Das A, Kitaoka N, Chuidian M, Ford M, Dbouk M, Borges M, He J, Burkhart R, Wolfgang CL, Klein AP, Eshleman JR, Hruban RH, Canto MI, Goggins M, Gene Variants That Affect Levels of Circulating Tumor Markers Increase Identification of Patients With Pancreatic Cancer, Clin Gastroenterol Hepatol., 10.1016/j.cgh.2019.10.036, 18, 5, 1161-1169, 2020.04.