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2019 Fiscal Year Final Research Report

ALDH activity-guided detection of lung tissue stem cells and its therapeutic use for pulmonary fibrosis

Research Project

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Project/Area Number 17K09654
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Respiratory organ internal medicine
Research InstitutionHiroshima University

Principal Investigator

Nakashima Taku  広島大学, 病院(医), 助教 (90643792)

Co-Investigator(Kenkyū-buntansha) 服部 登  広島大学, 医系科学研究科(医), 教授 (00283169)
Project Period (FY) 2017-04-01 – 2020-03-31
Keywords肺線維症 / 組織幹細胞 / ALDH / 間質性肺炎
Outline of Final Research Achievements

We have shown that the newly identified CD45-negative ALDH bright cells in the lung are reduced with the onset of murine pulmonary fibrosis in lung, and that they can be a novel tool for cell therapy to ameliorate pulmonary fibrosis and it's mortality when administered to the lung.
There was a strong association between the amount of lung CD45-negative ALDH bright cells and the extent of pulmonary fibrosis. Additionally, mice treated with CD45-negative ALDH bright cells showed suppress fibrosis by reducing inflammatory cytokines. This cell therapy could be a new treatment for pulmonary fibrosis, for which there is no effective treatment available to date.

Free Research Field

呼吸器内科学

Academic Significance and Societal Importance of the Research Achievements

肺線維症は、有効な治療法がなく生命予後の著しく不良な難治性疾患である。そのなかでも今日に至るまで原因が明らかとされていない特発性肺線維症については、その病態を解明するため多方面からの様々な取り組みがなされており、「肺組織幹細胞の機能不全」が肺線維症を悪化させるメカニズムの1つとして提唱されている。
本研究を通じて全く新たなアプローチで同定・採取されたマウス肺組織幹細胞であるCD45陰性ALDH高発現細胞による細胞治療は、現在に至るまで有効な治療法のないヒト肺線維症に対する新規細胞治療のツールへと発展が期待できる。

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Published: 2021-02-19  

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