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2023 Fiscal Year Final Research Report

The function of small Maf group factors in stress response transcriptional regulation and their association with cancer malignancy

Research Project

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Project/Area Number 20K07335
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 49010:Pathological biochemistry-related
Research InstitutionTohoku University

Principal Investigator

Katsuoka Fumiki  東北大学, 未来型医療創成センター, 教授 (30447255)

Project Period (FY) 2020-04-01 – 2024-03-31
Keywords酸化ストレス / NRF2 / 小MAF
Outline of Final Research Achievements

The NRF2 and small MAF heterodimers regulate the expression of genes involved in the defense response to oxidative stress. In vertebrates, three small MAF proteins have been identified, but the functional differences between these factors have not been fully analyzed. In this study, using an own unique system, we analyzed the characteristics of the NRF2-MAFG dimer and the functional differences between the NRF2-MAFF dimer. As a result, the sMAF C-terminal region, which is the most diverse among sMAFs, is not essential for NRF2-mediated transcriptional activation. Furthermore, while the NRF2-MAFF dimer can contribute to the transcriptional activation of cytoprotective genes similarly to the NRF2-MAFG dimer, the results showed the possible differences in their activation capabilities.

Free Research Field

遺伝子発現制御

Academic Significance and Societal Importance of the Research Achievements

特定の小MAF群因子が特定のがんで高発現していることが報告されているが、各小MAF因子の機能の違いは十分に解析されていなかった。今回、独自の解析系を用いて、MAFGとMAFFが基本的に共通した標的遺伝子転写活性化能を有していることが示された。この結果は、がん細胞を対象とした研究においても学術的に重要である。また、近年ヒトゲノムの解析が進み、同定されたバリアントの機能解釈の重要性が増す中で、小MAF群因子のC末端に関して得られた知見は、疾患ゲノム研究においても重要な知見となる。

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Published: 2025-01-30  

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