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2021 Fiscal Year Final Research Report

Functional analysis of novel immune checkpoints and development of combined immunotherapy in gynecological cancer

Research Project

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Project/Area Number 19K09832
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionKeio University

Principal Investigator

Nishio Hiroshi  慶應義塾大学, 医学部(信濃町), 講師 (90445239)

Co-Investigator(Kenkyū-buntansha) 岩田 卓  慶應義塾大学, 医学部(信濃町), 講師 (30296652)
谷口 智憲  慶應義塾大学, 医学部(信濃町), 講師 (40424163)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords卵巣癌 / がん免疫療法 / がん微小環境 / 免疫寛容
Outline of Final Research Achievements

We analyzed the function of Neuritin1 (Nr1), which is specifically expressed on regulatory T cells (Treg) in the cancer microenvironment. Tumors transplanted into Nrn1KO mice showed less tumor growth than those transplanted into WT mice. The number of tumor-infiltrating Tregs was also suppressed. The RNA sequence analysis of Nrn1 showed that Nrn1 was linked to the expression status of Treg-related genes, suggesting that Nrn1 is an important molecule for the induction and maintenance of regulatory T cells. Nrn1 is thought to be an important molecule for the induction and maintenance of regulatory T cells.

Free Research Field

婦人科腫瘍学

Academic Significance and Societal Importance of the Research Achievements

チェックポイント阻害剤が臨床効果を認めるという点やCD8+T 細胞を中心とした免疫病態には個体差があること,また個体差が免疫療法のみならず手術・化学療法などの標準治療の反応性にも関与することが報告されている.しかしこれらの機序の解明についてはまだ不明なことが多く,免疫病態を制御するための新たな治療標的の同定や治療薬の開発は遅れているのが現状である.今回新たに同定したNrn1 をターゲットとしたがん免疫療法はこれまで世界で報告がなく,本研究は極めて高い学術的独自性を有している.またNrn1 が治療標的としての効果が確認されれば,婦人科がんのみならず様々ながん腫に応用が拡がる可能性がある.

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Published: 2023-01-30  

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