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单核转录组学揭示肥胖引起的内皮和神经血管功能障碍:对认知衰退的影响
Dragan Milenkovic1, Saivageethi Nuthikattu2, Jennifer E Norman2
1Department of Nutrition, University of California, Davis, CA 95616, USA.
International journal of molecular sciences
|October 26, 2024
概括
肥胖会改变大脑细胞中的基因表达,影响认知功能. 这项研究揭示了神经血管单元中的分子变化,为与肥胖相关的认知衰退提供了潜在的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 肥胖与心血管疾病和血管痴呆症有关.
- 肥胖对大脑内皮细胞基因组学和神经血管单元 (NVU) 相互作用的影响尚不清楚.
研究的目的:
- 为了描述小鼠海马体NVU中肥胖诱导的转录组变化.
- 为了研究肥胖,NVU细胞类型和血脑屏障 (BBB) 透性之间的关系.
主要方法:
- 单核RNA测序 (snRNAseq) 在来自肥胖 (ob/ob) 和野生型 (WT) 小鼠的海马内NVU细胞 (内皮细胞,星体细胞,微质细胞,神经元) 上进行.
- 使用加多增强的MRI评估了血脑屏障的透性.
- 分析了差异表达基因 (DEG) 和途径.
主要成果:
- 肥胖的小鼠表现出肥胖,高胰岛素血症和葡萄糖耐受性受损.
- 在所有NVU细胞类型中,snRNAseq确定了DEG,神经元和星体细胞发生了显著的变化.
- 受影响的常见途径包括焦点粘附和胰岛素信号;血管新生和突触贩运也被确定.
- 在肥胖小鼠中观察到BBB透率增加的趋势.
- 在TNF和mTOR等途径中发现了差异表达的长非编码RNA (lncRNA).
结论:
- 肥胖导致海马体NVU中广泛的转录基因变化.
- 这些变化为与肥胖相关的认知功能障碍提供了分子见解.
- 研究结果表明,基因疗法可能是治疗肥胖症认知衰退的潜在目标.
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