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2020 Fiscal Year Final Research Report

Antitumor effect of galectin-9 in esophageal squamous cell carcinoma and identification of target microRNAs

Research Project

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Project/Area Number 19K16747
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 50010:Tumor biology-related
Research InstitutionKagawa University

Principal Investigator

Chiyo Taiga  香川大学, 医学部附属病院, 助教 (50769346)

Project Period (FY) 2019-04-01 – 2021-03-31
Keywordsガレクチン9 / 食道扁平上皮癌 / アポトーシス
Outline of Final Research Achievements

Galectin-9 (Gal-9) induces apoptosis in a variety of cancers, however, the mechanism of apoptosis is still unknown, thus this experiment was conducted. Gal-9 significantly inhibited tumor growth in esophageal squamous cell carcinoma cell lines and xenograft mouse models.
Gal-9 induced phosphorylation of JNK and MAPKp38, and increased cytochrome c, Smac/Diablo, HtrA2/omi in cytoplasm, and loss of mitochondrial membrane potential , as well as an increase in Annexin V-positive cells and activation of caspase-3, suggesting that Gal-9 induces mitochondria-mediated apoptosis.

Free Research Field

消化器病学

Academic Significance and Societal Importance of the Research Achievements

ガレクチンはβ-ガラクトシドへ特異的に結合し,細胞間情報伝達因子として機能する。ガレクチン-9(Gal-9)はT細胞やマクロファージ、樹状細胞の活性化を介し腫瘍免疫を賦活化する。もともと生体内に存在する物質であり、過去の動物実験では毒性が無いことが示されており、抗腫瘍効果が示されれば今後新規の抗癌剤としての応用も期待される。今回の検討でGal-9は食道扁平上皮癌に対し、直接的作用としてミトコンドリアを介するアポトーシスを誘導することが示され、新規抗癌剤の候補となる可能性が示された。

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Published: 2022-01-27  

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