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2023 Fiscal Year Final Research Report

The tumor suppressor p130RB2 functions in replication stress response and suppression of chromosome instability

Research Project

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Project/Area Number 20K07614
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

UCHIDA Chiharu  浜松医科大学, 光医学総合研究所, 准教授 (60223567)

Co-Investigator(Kenkyū-buntansha) 塩谷 文章  国立研究開発法人国立がん研究センター, 研究所, ユニット長 (10627665)
丹伊田 浩行  浜松医科大学, 医学部, 准教授 (20336671)
北川 雅敏  浜松医科大学, 医学部, 教授 (50294971)
Project Period (FY) 2020-04-01 – 2024-03-31
Keywordsがん抑制因子 / p130RB2 / 複製ストレス / 染色体不安定性
Outline of Final Research Achievements

Proper DNA replication and division control cell proliferation. When intracellular or extracellular disturbances aberrantly arrest DNA replication, replication stress responses occur to prevent cell division from proceeding without completing correct DNA replication, resulting in a pause in cell proliferation. In this study, we found that the tumor suppressor p130RB2 is actively involved in the DNA replication stress response by activating ATR, one of the critical phosphorylation enzymes in the DNA damage response pathway. p130RB2 dysfunction causes chromosomal aberrations and prevents normal cell growth.

Free Research Field

がん研究、細胞周期、DNA損傷応答

Academic Significance and Societal Importance of the Research Achievements

がん抑制因子RBファミリーの一つであるp130RB2が機能しない場合、適切な複製ストレス応答が起こらず、細胞の染色体異常や増殖異常を誘発することが示された。したがって、がん抑制因子p130RB2はDNA複製の異常時に対応して染色体を守るという、これまで明らかでなかった機能をもつことがわかり、がん抑制因子としての重要性を示すことができた。

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Published: 2025-01-30  

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