一种棕色脂肪丰富的阿迪波金,ASRA,是激素受体对手,刺激食欲
Lei Huang1,2, Pengpeng Liu1,3,2, Yong Du1,2
1Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA.
bioRxiv : the preprint server for biology
|September 25, 2023
概括
研究人员发现了ASRA,这是一个刺激食欲的因素,它对抗勒素受体信号传递. 这一发现揭示了能量赤字信号,并为肥胖和抗素抵抗提供了新的见解.
科学领域:
- 内分泌学 在内分泌学.
- 代谢过程中的代谢.
- 神经科学是一个神经科学.
背景情况:
- 食物摄入的内分泌调节尚未完全理解.
- 目前尚不清楚是否存在一种幽默因子,可以负面调节脑下垂体中瘦素受体 (LepR) 路径.
研究的目的:
- 确定和描述一种参与能源赤字信号的新型食欲刺激因子 (ASRA).
- 阐明ASRA对抗LepR信号的机制及其在代谢调节中的作用.
主要方法:
- 通过功能性研究识别ASRA.
- 在脂肪组织和肝脏中分析ASRA表达.
- 使用ASRA过度表达和淘汰赛小鼠模型的体内研究.
- 生物化学和结构分析 (AlphaFold2) 来确定ASRA-LepR相互作用.
主要成果:
- ASRA是一种8kD蛋白质,在脂肪组织和肝脏中选择性表达,在能量缺乏期间分泌.
- 过度表达ASRA会导致肥胖和血糖升高,因为它会减弱LepR信号.
- 亚斯拉淘汰赛小鼠表现出增强的瘦素敏感性,改善的葡萄糖平衡,以及对饮食诱导的肥胖的抵抗力.
- ASRA直接与LepR结合,作为一种高亲和度的抗剂,模仿了勒的结合部位.
结论:
- ASRA是一种新型的外围能量缺陷信号,它对抗 LepR 信号.
- 这一发现揭示了一种新的内分泌调节食欲的机制.
- 了解ASRA的作用对瘦素抗性和肥胖症治疗有重大影响.
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