选择性激活PPARα维持了色脂肪细胞的发热能力
Gentaro Egusa1, Haruya Ohno1, Gaku Nagano1
1Department of Molecular and Internal Medicine, Graduate School of Biomedical & Health Sciences, Hiroshima University, Hiroshima, Japan.
iScience
|July 17, 2023
概括
选择性PPARα与pemafibrate的激活保持了色脂肪细胞的发热功能,提供了一个潜在的策略来对抗肥胖. 这种方法避免了与维持这些关键脂肪细胞的其他治疗方法相关的副作用.
科学领域:
- 代谢和内分泌学
- 脂肪细胞生物学 脂肪细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 色脂肪细胞对于发热和对抗肥胖至关重要,但暂时失去功能.
- 目前用于维持色脂肪细胞功能的方法,如PPARγ和β-上腺激动剂,具有局限性和副作用.
- 确定稳定的方法来维持色脂肪细胞的热生成能力对于治疗开发至关重要.
研究的目的:
- 调查氧酶增殖器激活受体α (PPARα) 的药理活性潜力,以维持诱导的色脂肪细胞.
- 评价选择性PPARα调节剂 (SPPARMα) 佩马菲布拉特在保持色脂肪细胞功能和改善肥胖小鼠代谢参数方面的疗效.
- 阐明PPARα介导维护色脂肪细胞热生成的基础分子机制.
主要方法:
- 在饮食诱导的肥胖小鼠模型中,给予pemafibrate.
- 在色脂肪细胞中评估发热能力.
- 分析体重,葡萄糖耐受性和基因表达 (转录组分析).
- 研究转录因子ELK1在PPARα介导的基因调节中的作用.
主要成果:
- 佩玛纤维酸的使用有效地维持了诱导的色脂肪细胞的热生成能力.
- 在肥胖的小鼠中,用纤维酸治疗抑制了体重增加和改善了葡萄糖耐受性损失.
- 转录组分析确定ELK1是PPARα辅因子,与PPARα一起,调节UCp1表达,以应对pemafibrate.
结论:
- 使用pemafibrate选择性激活PPARα是维持色脂肪细胞功能的一个有希望的策略.
- 佩马菲布拉特通过增强热生成来证明对治疗肥胖和代谢功能障碍的治疗潜力.
- PPARα和ELK1之间的相互作用是调节色脂肪细胞热生成基因表达的关键机制.
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