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2023 Fiscal Year Final Research Report

Mechanisms analysis of lung cancer suppression and cell death by an autophagy inducible gene BHLHE41.

Research Project

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Project/Area Number 21K07129
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 InstitutionKagoshima University

Principal Investigator

Tatsuhiko Furukawa  鹿児島大学, 医歯学総合研究科, 客員研究員 (40219100)

Co-Investigator(Kenkyū-buntansha) 河原 康一  鹿児島大学, 医歯学域医学系, 准教授 (00400482)
山本 雅達  鹿児島大学, 医歯学域医学系, 助教 (40404537)
Project Period (FY) 2021-04-01 – 2024-03-31
Keywords非小細胞肺癌 / BHLHE41 / 細胞死 / BAX / オートファジ― / MYC
Outline of Final Research Achievements

Lung cancer is the leading cause of cancer death in Japan, and its incidence continues to increase.
BHLHE41 is a transcription factor that mainly functions in a repressive manner in circadian rhythms and differentiations of various cell lineages. We have found that expression of BHLHE41 in tumor cells correlates with good prognosis of patients with non-small cell lung cancer(NSCLC)and that induction of BHLHE41 expression in NSCLC cell lines causes autophagic cell death. In this study, we found that BHLHE41 suppressed MYC function and BAX expression, and BHLHE41 also suppressed MYC-inducible gene expression, including Cyclin-A2 and CDK4 genes. BHLHE41 may suppress carcinogenesis by acting as an inhibitor of MYC function.

Free Research Field

がん生物学

Academic Significance and Societal Importance of the Research Achievements

異種移植系でBHLHE41の強制発現は肺がん細胞の縮小効果からBHLHE41の標的分子は肺がんの治療の標的となりえることをすでに示している。
本研究でBHLHE41のMYCの機能の抑制という、非小細胞肺癌発生でのBHLHE41の重要性の一端が具体的に明らかにできた。BHLHE4はがんの悪性化ステップで必要になるMYCの機能の活性化を抑制することが推測された。BHLHE41が抑制するMYCを含む活性化分子群を同定することで肺がんのハイリスク群での早期肺がんの悪性化の予防が可能になる可能性があり、世界的にも増加傾向にある肺がんの予防という革新的な医療が期待できる。

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Published: 2025-01-30  

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