Updated on 2024/09/18

Information

 

写真a

 
HOSOKAWA KENTARO
 
Organization
Faculty of Medical Sciences Department of Stem Cell Biology and Medicine Lecturer
School of Medicine Department of Medicine(Concurrent)
Graduate School of Medical Sciences Department of Medicine(Concurrent)
Graduate School of Medical Sciences Department of Medical Sciences(Concurrent)
Title
Lecturer
Profile
I am studying hematopoietic tissue. The main targets are hematopoietic stem cells and mesenchymal stem cells. In order to clarify the mechanism of maintaining the self-renewal ability of these cells, we are conducting research using cell biological and histological methods as well as data science approaches. We carry out research activities as "one team" while instructing undergraduate students, master's and doctoral students.
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External link

Degree

  • Ph.D.

Research History

  • なし

    なし

Research Interests・Research Keywords

  • Research theme:Analysis of signal networks in hematopoietic microenvironment

    Keyword:Niche, Hematopoietic stem cell, Mesenchymal stem cell

    Research period: 2020.6 - 2026.3

  • Research theme:Functional analysis of telomere binding proteins for self-renewal mechanism of bone marrow hematopoietic stem cells

    Keyword:hematopoietic stem cell, telomere binding protein, energy metabolism

    Research period: 2014.4 - 2027.3

Awards

  • 学術奨励賞

    2019.6   宇部興産学術振興財団   テロメア結合因子による正常造血および白血病幹細胞の代謝制御機構の解明

  • 若手特別賞

    2018.10   公益信託 日本白血病研究基金   白血病幹細胞のエネルギー代謝に対するテロメア結合因子の機能解析

  • 奨励賞

    2016.10   日本血液学会   第77回日本血液学会学術集会 一般口演 演題名: Protection of telomeres 1 (Pot1) regulates hematopoietic stem cell activity during ageing.

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    Repeated cell divisions induce DNA damage accumulation, which impair stem ce ll function during ageing. However
    the general molecular mechanisms by whic h this occurs remain unclear. Here, we show that expression of
    protection of telomeres 1a (Pot1a), a component of shelterin, is crucial for the preventi on of telomeric
    DNA damage response (DDR) and maintenance of hematopoietic s tem cell (HSC) activity during ageing. We observed
    that HSCs express high le vels of Pot1a during development, yet this expression declines with age. Kno ckdown
    of Pot1a induced an age-related phenotype, marked by increased telome ric DDR, and reduced long-term
    reconstitution activity. In contrast, overexp ression of Pot1a or treatment with exogenous Pot1a protein
    prevented telomer ic DDR, enhanced telomerase activity and rejuvenated HSC activity. Similar r ejuvenation
    was observed upon treatment of human HSCs with recombinant human
    POT1 protein. These results highlight a general, reversible mechanism by wh ich ageing compromises mammalian
    stem cell activity, with widespread implica tions for regenerative medicine.

Papers

  • The telomere binding protein Pot1 maintains haematopoietic stem cell activity with age. Reviewed International journal

    Hosokawa Kentaro, MacArthur BD, Ikushima YM, Toyama H, Masuhiro Y, Hanazawa S, Suda T, Fumio Arai

    Nature Communications   8 ( 1 )   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41467-017-00935-4

  • Knockdown of N-cadherin suppresses the long-term engraftment of hematopoietic stem cells.

    Hosokawa Kentaro, Fumio Arai, Yoshihara H, Iwasaki H, Nakamura Y, Gomei Y, Suda T

    Blood.   2010.7

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    Language:English  

  • Cadherin-based adhesion is a potential target for niche manipulation to protect hematopoietic stem cells in adult bone marrow.

    Hosokawa Kentaro, Fumio Arai, Yoshihara H, Iwasaki H, Hembree M, Yin T, Nakamura Y, Gomei Y, Takubo K, Shiama H, Matsuoka S, Li L, Suda T

    Cell Stem Cell.   2010.3

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    Language:English  

  • Function of oxidative stress in the regulation of hematopoietic stem cell-niche interaction.

    Hosokawa Kentaro, Fumio Arai, Yoshihara H, Nakamura Y, Gomei Y, Iwasaki H, Miyamoto K, Shima H, Ito K, Suda T

    Biochem Biophys Res Commun.   2007.11

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    Language:English  

  • POT1a deficiency in mesenchymal niches perturbs B-lymphopoiesis

    Nakashima, K; Kunisaki, Y; Hosokawa, K; Gotoh, K; Yao, H; Yuta, R; Semba, Y; Nogami, J; Kikushige, Y; Stumpf, PS; MacArthur, BD; Kang, D; Akashi, K; Ohga, S; Arai, F

    COMMUNICATIONS BIOLOGY   6 ( 1 )   996   2023.9   eISSN:2399-3642

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    Language:English   Publisher:Communications Biology  

    Protection of telomeres 1a (POT1a) is a telomere binding protein. A decrease of POT1a is related to myeloid-skewed haematopoiesis with ageing, suggesting that protection of telomeres is essential to sustain multi-potency. Since mesenchymal stem cells (MSCs) are a constituent of the hematopoietic niche in bone marrow, their dysfunction is associated with haematopoietic failure. However, the importance of telomere protection in MSCs has yet to be elucidated. Here, we show that genetic deletion of POT1a in MSCs leads to intracellular accumulation of fatty acids and excessive ROS and DNA damage, resulting in impaired osteogenic-differentiation. Furthermore, MSC-specific POT1a deficient mice exhibited skeletal retardation due to reduction of IL-7 producing bone lining osteoblasts. Single-cell gene expression profiling of bone marrow from POT1a deficient mice revealed that B-lymphopoiesis was selectively impaired. These results demonstrate that bone marrow microenvironments composed of POT1a deficient MSCs fail to support B-lymphopoiesis, which may underpin age-related myeloid-bias in haematopoiesis.

    DOI: 10.1038/s42003-023-05374-0

    Web of Science

    Scopus

    PubMed

  • Machine Learning of Hematopoietic Stem Cell Divisions from Paired Daughter Cell Expression Profiles Reveals Effects of Aging on Self-Renewal Reviewed International journal

    Fumio Arai, Patrick S Stumpf, Yoshiko M Ikushima, Kentaro Hosokawa, Aline Roch, Matthias P Lutolf, Toshio Suda, Ben D MacArthur

    CELL SYSTEMS   11 ( 6 )   640 - +   2020.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.cels.2020.11.004

  • Mitochondrial Protein Synthesis Is Essential for Terminal Differentiation of CD45(-) TER119(-) Erythroid and Lymphoid Progenitors Invited Reviewed International journal

    Kazuhito Gotoh, Yuya Kunisaki, Soichi Mizuguchi, Daiki Setoyama, Kentaro Hosokawa, Hisayuki Yao, Yuya Nakashima, Mikako Yagi, Takeshi Uchiumi, Yuichiro Semba, Jumpei Nogami, Koichi Akashi, Fumio Arai, Dongchon Kang

    ISCIENCE   23 ( 11 )   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.isci.2020.101654

  • Determining c-Myb protein levels can isolate functional hematopoietic stem cell subtypes International journal

    Sakamoto H, Takeda N, Fumio Arai, Hosokawa Kentaro, Garcia P, Suda T, Frampton J, Ogawa M

    Stem Cells   2015.2

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    Language:English  

    DOI: 10.1002/stem.1855

  • Role of endothelial cell-derived angptl2 in vascular inflammation leading to endothelial dysfunction and atherosclerosis progression.

    Horio E, Kadomatsu T, Miyata K, Arai Y, Hosokawa Kentaro, Doi Y, Ninomiya T, Horiguchi H, Endo M, Tabata M, Tazume H, Tian Z, Takahashi O, Terada K, Takeya M, Hao H, Hirose N, Minami T, Suda T, Oike Y

    Arterioscler Thromb Vasc Biol.   2014.4

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    Language:English  

  • Nucleostemin is indispensable for the maintenance and genetic stability of hematopoietic stem cells.

    Yamashita M, Nitta E, Nagamatsu Go, Ikushima YM, Hosokawa Kentaro, Fumio Arai, Suda T

    Biochem Biophys Res Commun.   2013.11

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    Language:English  

  • Prostaglandin E(2) regulates murine hematopoietic stem/progenitor cells directly via EP4 receptor and indirectly through mesenchymal progenitor cells.

    Ikushima YM, Hosokawa Kentaro, Fumio Arai, Toyama H, Takubo K, Furuyashiki T, Narumiya S, Suda T

    Blood.   2013.3

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    Language:English  

  • Enhanced Angpt1/Tie2 signaling affects the differentiation and long-term repopulation ability of hematopoietic stem cells.

    Ikushima YM, Fumio Arai, Nakamura Y, Hosokawa Kentaro, Kubota Y, Hirashima M, Toyama H, Suda T

    Biochem Biophys Res Commun.   2013.1

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    Language:English  

  • N-cadherin+ HSCs in fetal liver exhibit higher long-term bone marrow reconstitution activity than N-cadherin- HSCs.

    Toyama H, Fumio Arai, Hosokawa Kentaro, Ikushima YM, Suda T

    Biochem Biophys Res Commun.   2012.11

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    Language:English  

  • p57(Kip2) and p27(Kip1) cooperate to maintain hematopoietic stem cell quiescence through interactions with Hsc70.

    Zou P, Yoshihara H, Hosokawa Kentaro, Tai I, Shinmyozu K, Tsukahara F, Maru Y, Nakayama K, Keiichi Nakayama, Suda T

    Cell Stem Cell.   2011.9

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    Language:English  

  • Telomerase reverse transcriptase protects ATM-deficient hematopoietic stem cells from ROS-induced apoptosis through a telomere-independent mechanism.

    Nitta E, Yamashita M, Hosokawa Kentaro, Xian M, Takubo K, Fumio Arai, Nakada S, Suda T

    Blood.   2011.4

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    Language:English  

  • Isolation and characterization of endosteal niche cell populations that regulate hematopoietic stem cells.

    Nakamura Y, Fumio Arai, Iwasaki H, Hosokawa Kentaro, Kobayashi I, Gomei Y, Matsumoto Y, Yoshihara H, Suda T

    Blood.   2010.8

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    Language:English  

  • 骨中コラーゲン高親和性タンパク質の骨芽細胞様細胞株MC3T3-E1細胞の骨形成過程に及ぼす影響. Reviewed

    村上 拡治, @細川 健太郎, 祭 友昭, 笠井 久隆, 井上 順雄

    日本保健科学学会誌   12 ( 4 )   237 - 244   2010.3

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    我々は既に、ウシ大腿骨皮質骨中にコラーゲンに高親和性を持つ、酸性タンパク質を検出、報告した。本研究では、骨芽細胞様細胞株MC3T3-E1細胞の培養系を用いて、このコラーゲン高親和性タンパク質(C-HAP)が骨形成過程に及ぼす影響を検討した。C-HAPを含む内因性のタンパク質精製画分(2画分)と外因性のポリグルタミン酸(PGA)をそれぞれMC3T3-E1細胞の培養系に添加し、細胞形態、ALP活性および骨基質の石灰化を評価した。その結果、(1)PGAはALP活性を増強し、タンパク質の集積と骨基質の石灰化を促進したこと、(2)C-HAPはALP活性を減弱し、タンパク質の集積と骨基質の石灰化を促進したこと、また、(3)PGAが細胞を多角形に保つのに対して、C-HAPは細胞を紡錘形に変えたことが明らかとなった。以上の結果を踏まえて、骨中のコラーゲン高親和性タンパク質の骨形成過程における役割を考察した。

    DOI: 10.24531/jhsaiih.12.4_237

  • Functional differences between two Tie2 ligands, angiopoietin-1 and -2, in regulation of adult bone marrow hematopoietic stem cells.

    Gomei Y, Nakamura Y, Yoshihara H, Hosokawa Kentaro, Iwasaki H, Suda T, Fumio Arai

    Exp Hematol.   2010.2

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    Language:English  

  • Reconstitution activity of hypoxic cultured human cord blood CD34-positive cells in NOG mice.

    Shima H, Takubo K, Iwasaki H, Yoshihara H, Gomei Y, Hosokawa Kentaro, Fumio Arai, Takahashi T, Suda T

    Biochem Biophys Res Commun.   2009.1

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  • Fbxw7 acts as a critical fail-safe against premature loss of hematopoietic stem cells and development of T-ALL.

    Matsuoka S, Oike Y, Onoyama I, Iwama A, Fumio Arai, Takubo K, Mashimo Y, Oguro H, Nitta E, Ito K, Miyamoto K, Yoshiwara H, Hosokawa Kentaro, Nakamura Y, Gomei Y, Iwasaki H, Hayashi Y, Matsuzaki Y, Keiichi Nakayama, Suda T

    Genes Dev.   2008.4

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    Language:English  

  • Thrombopoietin/MPL signaling regulates hematopoietic stem cell quiescence and interaction with the osteoblastic niche.

    Yoshihara H, Fumio Arai, Hosokawa Kentaro, Hagiwara T, Takubo K, Nakamura Y, Gomei Y, Iwasaki H, Matsuoka S, Miyamoto K, Miyazaki H, Takahashi T, Suda T

    Cell Stem Cell.   2007.12

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    Language:English  

  • Foxo3a is essential for maintenance of the hematopoietic stem cell pool.

    Miyamoto K, Araki KY, Naka K, Fumio Arai, Takubo K, Yamazaki S, Matsuoka S, Miyamoto T, Ito K, Ohmura M, Chen C, Hosokawa Kentaro, Nakauchi H, Nakayama K, Keiichi Nakayama, Harada M, Motoyama N, Suda T, Hirao A

    Cell Stem Cell.   2007.6

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  • Regulation of reactive oxygen species by Atm is essential for proper response to DNA double-strand breaks in lymphocytes.

    Ito K, Takubo K, Fumio Arai, Satoh H, Matsuoka S, Ohmura M, Naka K, Azuma M, Miyamoto K, Hosokawa Kentaro, Ikeda Y, Mak TW, Suda T, Hirao A

    J Immunol.   2007.1

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  • Reactive oxygen species act through p38 MAPK to limit the lifespan of hematopoietic stem cells.

    Ito K, Hirao A, Fumio Arai, Takubo K, Matsuoka S, Miyamoto K, Ohmura M, Naka K, Hosokawa Kentaro, Ikeda Y, Suda T

    Nat Med.   2006.4

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    Language:English  

  • Regulation of oxidative stress by ATM is required for self-renewal of haematopoietic stem cells.

    Ito K, Hirao A, Fumio Arai, Matsuoka S, Takubo K, Hamaguchi I, Nomiyama K, Hosokawa Kentaro, Sakurada K, Nakagata N, Ikeda Y, Mak TW, Suda T

    Nature.   2004.10

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    Language:English  

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Books

  • Role of N-cadherin in the regulation of hematopoietic stem cells in the bone marrow niche.

    @Arai F, @Hosokawa K, Toyama H, Matsumoto Y, Suda T.( Role: Joint author)

    Ann N Y Acad Sci.  2012.8 

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    Responsible for pages:1266 (1): 72-77   Language:English   Book type:Scholarly book

    DOI: 10.1111/j.1749-6632.2012.06576.x.

  • Network analysis in systems biology. Gene expression profiling and regulatory networks in single cell. Network analysis in systems biology.

    @Arai F, @Hosokawa K, Matsumoto Y, Toyama H, Suda T.( Role: Joint author)

    Springer International Publishing AG.  2012.1 

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    Responsible for pages:pp. 1-13 ISBN 978-94-007-4330-4   Language:English   Book type:Scholarly book

  • Niche regulation of hematopoietic stem cells in the endosteum.

    @Arai F, Yoshihara H, @Hosokawa K, Nakamura Y, Gomei Y, Iwasaki H, Suda T.( Role: Joint author)

    Ann N Y Acad Sci  2009.5 

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    Responsible for pages:1176:36-46   Language:English   Book type:Scholarly book

Presentations

  • Function of Foxp2 on the self-renewal ability of hematopoietic stem cells

    2022.10 

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    Event date: 2022.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  • Foxp2 is essential for the quiescent state and self-renewal capacity of hematopoietic stem cells. International conference

    International Society for Experimental Hematology  2017.8 

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    Event date: 2017.8

    Language:English  

    Country:Germany  

  • Shelterin component protection of telomeres 1 (Pot1) plays a critical role in the self-renewal of HSCs. International conference

    Joint symposium of PNU and Kyushu Univ  2015.8 

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    Event date: 2015.8

    Language:English   Presentation type:Symposium, workshop panel (public)  

    Country:Japan  

  • POT1 regulates self-renewal activity of cord blood hematopoietic stem cells International conference

    International Society for Experimental Hematology  2014.8 

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    Event date: 2014.8

    Language:English   Presentation type:Symposium, workshop panel (public)  

    Country:Canada  

    Other Link: https://iseh.site-ym.com/

  • Pot1 regulates hematopoietic stem cell activity during aging

    2014.5 

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    Event date: 2014.5

    Language:English   Presentation type:Symposium, workshop panel (public)  

    Country:Japan  

MISC

Professional Memberships

  • Stem Cell Research Symposium

  • THE JAPANESE SOCIETY OF HEMATOLOGY

  • International Society for Experimental Hematology

  • American Society of Hematology

Academic Activities

  • ファシリテーター

    第77回日本血液学会学術集会  ( 石川県立音楽堂、他(金沢市) ) 2015.10

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    Type:Competition, symposium, etc. 

Research Projects

  • 正常および腫瘍造血微小環境におけるテロメア結合因子の機能解明

    Grant number:23K07861  2023 - 2025

    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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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 新たに同定した骨髄間葉系幹細胞による造血幹細胞の維持機構の解明

    Grant number:23H02935  2023 - 2025

    日本学術振興会  科学研究費助成事業  基盤研究(B)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 骨髄造血微小環境の質と量を制御する転写シグナルネットワークの解明

    Grant number:20K08733  2020 - 2022

    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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    Authorship:Principal investigator  Grant type:Scientific research funding

  • シェルタリン因子による造血微小環境(ニッチ)の機能制御メカニズムの解明

    Grant number:20H03711  2020

    日本学術振興会  科学研究費助成事業  基盤研究(B)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 次世代型人工ニッチを用いた造血幹細胞の非対称分裂制御機構の解明と体外増幅

    Grant number:17H04208  2017 - 2019

    日本学術振興会  科学研究費助成事業  基盤研究(B)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 造血幹細胞の未分化性維持に対する転写因子Foxp2の機能解析

    Grant number:17K09907  2017 - 2019

    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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    Authorship:Principal investigator  Grant type:Scientific research funding

  • シングルセル統合解析による新規間葉系幹細胞の同定と造血制御能の解明

    Grant number:15K15366  2015 - 2016

    科学研究費助成事業  挑戦的萌芽研究

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 医学系研究奨励・基礎「テロメア結合性因子による造血幹細胞の体外増幅技術の開発」

    2015

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    Grant type:Donation

  • がん研究助成「Shelterin分子複合体を標的とした白血病幹細胞の形成抑制技術の開発」

    2015

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    Grant type:Donation

  • テロメア結合蛋白POT1の増強によるヒト造血幹細胞の体外増幅技術への挑戦

    Grant number:25670453  2013 - 2014

    科学研究費助成事業  挑戦的萌芽研究

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 造血幹細胞における細胞競合を介した増殖制御機構の解明

    Grant number:24689041  2012 - 2014

    科学研究費助成事業  若手研究(A)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 造血および白血病幹細胞ニッチの分子機構とその制御

    Grant number:23249053  2011 - 2013

    日本学術振興会  科学研究費助成事業  基盤研究(A)

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    Authorship:Coinvestigator(s)  Grant type:Scientific research funding

  • 研究助成「POT1の増強による造血幹細胞の体外増幅法の開発」

    2011

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    Grant type:Donation

  • 造血幹細胞の単一細胞単位での非対称分裂機構の解析

    Grant number:22790920  2010 - 2011

    科学研究費助成事業  若手研究(B)

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 血液医学研究助成「造血幹細胞の単一細胞単位における非対称分裂機構の解析」

    2010

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    Grant type:Donation

  • 骨髄内ニッチによる造血幹細胞制御機構の解明

    Grant number:07J02999  2007 - 2008

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • 骨髄内ニッチによる造血幹細胞制御機構の解明

    2007 - 2008

    日本学術振興会  特別研究員

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    Authorship:Principal investigator  Grant type:Joint research

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Educational Activities

  • 1. Initial research support and guidance in the laboratory assignment of a third-year student at Kyushu University School of Medicine or department of life sciences
    2. Support and guidance for graduation research at Kyushu University Graduate School of Medicine, fourth grader
    3. Support and guidance for graduate studies of master's or doctoral students at Kyushu University Graduate School of Medicine