ISRIB可以缓解与衰老相关的棕色脂肪UCP1转化抑制和热原性缺陷
Muze Li1, Mengjie Gao2, Meiqi Jia2
1Department of Occupational and Environmental Health, Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi'an, China; National Translational Science Center for Molecular Medicine & Department of Cell Biology, Fourth Military Medical University, Xi'an, China; School of Basic Medicine, Fourth Military Medical University, Xi'an, China.
Biochemical and biophysical research communications
|July 2, 2023
概括
老龄化会损害棕色脂肪的热生成,增加寒冷压力风险. 一种新的ISR抑制剂 (ISRIB) 恢复了UCP1的功能,增加了热量产生,改善了老年小鼠的代谢健康.
科学领域:
- 代谢健康 代谢健康
- 衰老的研究研究.
- 热生成是一种热生成.
背景情况:
- 老年人表现出降低的新陈代谢率,阻碍热量产生和增加低温风险.
- 棕色脂肪组织 (BAT) 的热生成活性随着年龄的增长而下降,这与减少的UCP1表达和翻译抑制有关.
- 衰老会加剧棕色脂肪中的氧化应激,激活综合应激反应 (ISR) 并通过eIF2α酸化抑制全球mRNA转化.
研究的目的:
- 为了研究小分子ISR抑制剂 (ISRIB) 逆转与年龄相关的棕色脂肪功能障碍的疗效.
- 确定ISRIB是否可以恢复UCP1介导的热生成,并改善老年小鼠的代谢参数.
主要方法:
- 用ISR抑制剂ISRIB治疗老年小鼠.
- 评估棕色脂肪的发热活性,UCP1表达和mRNA翻译.
- 评估寒冷压力反应,新陈代谢率,葡萄糖不耐受和胰岛素抵抗.
主要成果:
- 通过ISRIB治疗减弱了eIF2α酸化,缓解了Ucp1mRNA翻译的抑制.
- ISRIB恢复了UCP1介导的热生成功能,增强了老年小鼠对寒冷压力的防御能力.
- 在老年小鼠中,ISRIB增加了代谢率,并减轻了葡萄糖不耐受和胰岛素抵抗.
结论:
- ISRIB有效地扭转了UCP1-介导的热生成中的与年龄相关的缺陷.
- 在老年人群中,ISRIB显示出对抗感冒压力和相关代谢疾病的治疗剂的潜力.
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