禁食诱导了代谢开关和脂质处理的空间再分配以及 tanycytes 中的神经元相互作用
Maxime Brunner1,2, David Lopez-Rodriguez2,3, Judith Estrada-Meza2,3
1Service of Endocrinology, Diabetology, and Metabolism, Lausanne University Hospital, Lausanne, Switzerland.
Nature communications
|August 4, 2024
概括
禁食改变了下丘脑表皮细胞中的基因表达,揭示了tanycyte亚群中的动态转变. 这项研究揭示了这些细胞中对能量平衡至关重要的分子多样性和功能可塑性.
科学领域:
- 神经内分泌学神经内分泌学
- 代谢调节 代谢调节 代谢调节
- 细胞和分子神经科学
背景情况:
- 基底下垂体中第三心室 (3V) 的内膜对于能量平衡和葡萄糖平衡至关重要.
- 已知下丘脑表膜细胞的功能异质性和可塑性,但潜在的分子机制仍然不清楚.
研究的目的:
- 编制下丘脑内表皮细胞的目录,并研究控制它们异质性和可塑性的分子机制.
- 了解禁食引起的能量状态变化如何影响tanycyte亚群.
主要方法:
- 通过光激活细胞分类 (FACS) 辅助的单细胞RNA测序 (scRNAseq) 编目了5481个下丘脑表皮细胞.
- 分析了被养,12小时禁食和24小时禁食的成年雄性小鼠的细胞.
- 采用基于3V神经解剖学分布的伪空间方法来识别细胞特异性标记物和功能.
主要成果:
- 标准聚类揭示了明显的表皮细胞和β2细胞,而β1和α-细胞显示的边界不那么明确.
- 禁食动态改变了3V沿线的基因表达模式,导致细胞类型特定反应的空间再分配.
- 鉴定了tancyte亚群的特定标记物和功能,并揭示了能量状态变化引起的代谢和功能开关.
结论:
- 脑下垂体tanycyte亚群表现出显著的分子和功能多样性和可塑性.
- 能量状态的变化动态调节tanycyte功能,影响能量平衡和葡萄糖平衡.
- 这项研究提供了关于tanycytes在代谢控制中的复杂调节作用的关键见解.
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