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2022 Fiscal Year Final Research Report

Analysis of cellular response to acidification of tumor microenvironments

Research Project

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Project/Area Number 20H03515
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionKyoto University (2022)
Osaka University (2020-2021)

Principal Investigator

Miki Hiroaki  京都大学, 工学研究科, 教授 (80302602)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywordsがん
Outline of Final Research Achievements

In this study, we investigated the cellular adaptation to acidic environments, which is caused by overexpression of PRL, a molecule driving cancer malignancy. We found that lysosomal exocytosis occurs actively in PRL-overexpressing cells, releasing protons to the cell exterior and thereby maintaining intracellular pH even under acidic conditions. We also discovered that specific signaling activates lysosomal exocytosis.

Free Research Field

細胞生物学

Academic Significance and Societal Importance of the Research Achievements

悪性化したがん組織が酸性化していることは古くから知られてきたが、がん細胞の応答機構は長らく不明だった。本研究では、がん細胞がリソソームの膜動態を調節することで積極的にプロトンを排出して、酸性環境に適応してゆく仕組みを新たに発見することができた。がん悪性化の本態をその周辺環境との関わりの中で理解し、また、がんの人為的コントロールに道を開く重要な研究成果と評価できる。

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Published: 2024-01-30  

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