2021 Fiscal Year Final Research Report
Pericytes play a critical role in the development of idiopathic pulmonary fibrosis
Project/Area Number |
19K07418
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 49020:Human pathology-related
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Research Institution | Sapporo Medical University |
Principal Investigator |
Sakuma Yuji 札幌医科大学, 医学部, 准教授 (10364514)
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Project Period (FY) |
2019-04-01 – 2022-03-31
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Keywords | 特発性肺線維症 / 周皮細胞 / 筋線維芽細胞 / TGF- β |
Outline of Final Research Achievements |
Human lung pericytes (HuL-P), derived from normal human lung tissues, express PDGFRB and CSPG4, markers for pericytes. HuL-P cells stimulated by TGF-β signaling transition to myofibroblast-like cells. In addition, PDGFRB and CSPG4 are expressed in fibroblastic foci (FF) in lung tissues affected by IPF as well. These results collectively suggest that 1) pericytes activated by TGF-β signaling would transition to myofibroblasts in FF, and 2) suppression of pericyte-myofibroblast transition could mitigate pulmonary fibrosis.
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Free Research Field |
分子細胞病理学
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Academic Significance and Societal Importance of the Research Achievements |
特発性肺線維症の線維化は異時性、多発性に患者肺に形成される線維芽細胞巣 (fibroblastic foci, FF) により引き起こされる。FFの内部に毛細血管は存在せず、その存在は肺胞領域の生理的血流を遮断し、その下流に位置する肺胞隔壁を傷害する。FFはその特徴的局在と複数の周皮細胞マーカーを発現していることから周皮細胞由来が示唆される。さらに正常肺組織から得た周皮細胞は TGF- β signalの有無に応じて周皮細胞様から筋線維芽細胞様まで動的に表現型を変化させる。纏めると周皮細胞・筋線維芽細胞移行を抑制することが特発性肺線維症の病的線維化を抑制しうると考えられた。
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