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2018 Fiscal Year Final Research Report

Role of extracellular ATP on Hepatic stellate cell activation and liver fibrosis development

Research Project

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Project/Area Number 17K15952
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Gastroenterology
Research InstitutionEhime University

Principal Investigator

Yoshida Osamu  愛媛大学, 医学部附属病院, 講師 (70746809)

Research Collaborator Imai Yusuke  
Project Period (FY) 2017-04-01 – 2019-03-31
Keywords肝星細胞 / 細胞外ATP / P2X7 / PKR
Outline of Final Research Achievements

P2X7, extracellular ATP receptor, expression on hepatic stellate cell(HSC) was confirmed by RT-PCR and Western blotting assay. However, HSC activation by ATP was not mediated by P2X7. Although liver cirrhosis model was established on P2X7 knockout mouse, the severity of fibrosis was similar with wild type.
We have found that soluble agent from HSC promoted HCC development. Further the HCC development was regulated by protein kinase R(PKR) on HSC.

Free Research Field

医歯薬学

Academic Significance and Societal Importance of the Research Achievements

肝星細胞の活性化における細胞外ATP、P2X7の役割を明らかにすることはできなかった。
一方で、肝細胞癌の進展に肝星細胞が分泌する液性因子が寄与することを明らかにした。さらに肝星細胞の液性因子分泌はPKRが制御することを明らかにした。この成果は、肝硬変患者における肝細胞癌の進展機序の解明にみならず、新規治療薬の標的となる可能性を秘めている。肝星細胞におけるPKRの役割をさらに追及することで、肝の線維化に対する新しい治療法の開発も可能とする可能性を秘めている。

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Published: 2020-03-30  

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