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2022 Fiscal Year Final Research Report

Identification of novel MHC class I gene-inducing factors by proteonomics and CROP-seq technology

Research Project

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Project/Area Number 20K21511
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 49:Pathology, infection/immunology, and related fields
Research InstitutionHokkaido University

Principal Investigator

Kobayashi Koichi  北海道大学, 医学研究院, 教授 (60817162)

Co-Investigator(Kenkyū-buntansha) 畠山 鎮次  北海道大学, 医学研究院, 教授 (70294973)
應田 涼太  北海道大学, 医学研究院, 助教 (90817321)
Project Period (FY) 2020-07-30 – 2022-03-31
KeywordsMHC class I / NLRC5 / CIITA
Outline of Final Research Achievements

MHC class I transactivator (CITA), also known as NLRC5, serves as a key components in the transactivation of MHC class I and related genes, which are required for the immune responses against virus or cancer by activating CD8 T cells. Although NLRC5 lacks a DNA-binding domain, it generates a large DNA/protein complex termed CITA enhanceosome on the MHC class I promoter. However, the factors involved in this process is poorly understood. We performed non-biased proteomic approach and found several molecules involved in the MHC class I transactivation. This study would contribute to our understanding of the antigen presentation pathway for viral or cancer antigens.

Free Research Field

免疫

Academic Significance and Societal Importance of the Research Achievements

MHC-I分子は癌抗原やウイルス抗原などをCD8T細胞に提示することにより、癌細胞やウイルスの排除に必須である。このMHC-I分子の発現に必要な主要転写因子NLRC5同定に我々のグループは成功した。しかしながら、NLRC5によるMHC-I遺伝子発現の制御メカニズムは未だ大きく不明であった。本研究により、NLRC5に結合することによりMHC-I遺伝子発現の制御に関わる新しい遺伝子の発見することができた。MHC-I分子は癌やウイルス感染症に密接に関わっており、その制御メカニズムを解析することから新たな治療薬の発見開発が進展することが期待される。

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Published: 2024-01-30  

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