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2021 Fiscal Year Final Research Report

Development of epigenome sensor model mediated by nuclear receptor pathway

Research Project

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Project/Area Number 19K07200
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47060:Clinical pharmacy-related
Research InstitutionIwate Medical University

Principal Investigator

Habano Wataru  岩手医科大学, 薬学部, 准教授 (50332979)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywords核内受容体 / エピゲノム
Outline of Final Research Achievements

Exposure to xenobiotic compounds induces drug metabolizing enzymes through activation of nuclear receptor and promotes detoxification. For example, the ligand-activated nuclear receptor AhR, as a transcription factor, binds to XRE sequences in the regulatory region of the CYP1 gene. We found that DNA demethylation enhances the CYP1B1 gene expression induced by treatment with β-naphthoflavone (βNF). Chromatin immunoprecipitation using anti-AhR antibody revealed that AhR preferentially bound to XRE sequences without methylation. These results suggested that stress response mediated by AhR is regulated by DNA methylation status of target XRE sequences.

Free Research Field

薬物動態学

Academic Significance and Societal Importance of the Research Achievements

ヒトは生体外のストレスを感知して様々な反応をする。ヒト肝臓がん細胞に曝露したβNFは環境汚染物質であり、我々は核内受容体を介したストレス応答モデルを想定し、AhRのエピゲノムセンサーとしての役割を探索した。本研究で用いた新しい手法は、従来のレポーターアッセイやゲルシフトアッセイとは異なり、βNF曝露により活性化されたAhRと標的XRE配列との結合を自然なクロマチンの状態で評価できることが最大の特長である。本研究の成果は、他の転写因子が関わるストレス応答においても、DNAメチル化による応答性制御の評価に貢献することが期待できる。

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Published: 2023-01-30  

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