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2023 Fiscal Year Final Research Report

Signal molecules of ASCL1, a lineage-specific transcription factor for small cell carcinoma of the lung

Research Project

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Project/Area Number 20H03691
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 53030:Respiratory medicine-related
Research InstitutionKumamoto Health Science University (2021-2023)
Kumamoto University (2020)

Principal Investigator

Ito Takaaki  熊本保健科学大学, 保健科学部, 教授 (70168392)

Co-Investigator(Kenkyū-buntansha) 佐藤 陽之輔  熊本大学, 大学院生命科学研究部(医), 助教 (00823311)
永原 則之  日本医科大学, 医学部, 准教授 (10208043)
藤野 孝介  熊本大学, 病院, 講師 (10837339)
長谷川 功紀  福島県立医科大学, 保健科学部, 教授 (50525798)
山口 知也  熊本大学, 大学院先導機構, 准教授 (70452191)
Project Period (FY) 2020-04-01 – 2024-03-31
Keywords小細胞肺癌 / 神経内分泌分化 / ASCL1 / Notchシグナル / ROR2 / NOTCH2 / SOX1
Outline of Final Research Achievements

Small cell lung cancer (SCLC) often expresses cell-lineage transcription factor ASCL1, which shows various biological activities and chemosensitivity of this recalcitrant cancer. We supposed ROR2 as a candidate ASCL1-related signal molecule. ROR2 is expressed in ASCL1-dependent manner and/or in active Notch signaling condition, induces intratumor heterogeneity, and forms a cluster with high cell proliferation activity, which could be suppoted byAurora kinases. Furthermore, through single cell RNA sequence analysis, we found various transcription factors such SOX1 and NFACT2 during transdifferentiation from club cells to neuroendocrine cells in fetal lungs. Studies on ASCL-related molecules should contribute to further advances in the control of SCLC.

Free Research Field

病理学

Academic Significance and Societal Importance of the Research Achievements

小細胞肺癌は、高悪性度の難治性の神経内分泌癌で、この腫瘍の分子基盤を基にした治療法の開発が期待されるが、まだ、治療に応用される標的となる分子機構は十分にわたっていない。ASCL1は、肺小細胞癌の神経内分泌分化を制御する一方で、様々なこの腫瘍の生物学的な特徴にも関与する重要な分子である。本研究は、ASCL1に関連する分子を研究することで、将来のこの腫瘍の克服に向けた基礎的な意義のある研究である。

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Published: 2025-01-30  

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