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2024 Fiscal Year Final Research Report

Basic research to clarify the mechanism by which Nrf2 inhibits fat absorption and its application to obesity treatment

Research Project

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Project/Area Number 22K08621
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 54040:Metabolism and endocrinology-related
Research InstitutionKanazawa University

Principal Investigator

NAGATA NAOTO  金沢大学, 医学系, 講師 (70456408)

Project Period (FY) 2022-04-01 – 2025-03-31
Keywords肥満 / 転写因子 / 脂肪吸収 / エネルギー代謝
Outline of Final Research Achievements

Previously, the applicant reported that glucoraphanin (GR), an activator of the transcription factor Nrf2 (Nuclear factor erythroid 2-related factor 2), acts on brown adipose tissue to increase energy expenditure through thermogenesis and suppress obesity in mice fed a high-fat diet (Nagata N et al., Diabetes, 2017). I further investigated how pharmacological activation of Nrf2 influences intestinal fat absorption. They found that both GR and bardoxolone methyl (BARD), another Nrf2 activator, showed anti-obesity effects by reducing body weight in mice made obese by a high-fat diet. Furthermore, an oral oil loading test revealed that both drugs suppressed fat absorption. This suggests that activating Nrf2 may play a role in inhibiting the absorption of fat from the intestines.

Free Research Field

代謝学

Academic Significance and Societal Importance of the Research Achievements

肥満の是正は、高血圧、脂質異常症、脂肪性肝疾患、2型糖尿病などの生活習慣病の改善という観点から、特に重要である。しかし、本邦で承認されている抗肥満薬は、そのリスクとベネフィットの観点から、日本人の肥満症患者のほとんどを占める軽度・中度の症例すべてに適応されるわけではない。したがって、現在も、安全性と有効性を兼ね備えた抗肥満薬が求められている。アブラナ科野菜に含まれるGRはもとより、BARDも既に他の疾患の治療薬として臨床で使われている薬物であり、安全性は高い。無論、さらなる検討を加える必要があるが、抗肥満薬として臨床応用できる可能性がある。

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Published: 2026-01-16  

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