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老年人的周期性热浪诱导的神经元病因由肠-肝-大脑轴介导:一种转录组分析方法
Subhajit Roy1, Punnag Saha1, Dipro Bose1
1Environmental Health and Disease Laboratory, Department of Environmental and Occupational Health, Program in Public Health, Susan and Henry Samueli College of Health Sciences, University of California, Irvine, CA, 92697, USA.
Scientific reports
|May 8, 2024
概括
暴露于热应激的老年人表现出肝脑轴通信的改变. 肝脏增加的ORM2分泌可能导致神经炎症和大脑功能受损.
科学领域:
- 老年学是指老年学的学科.
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 热压力,特别是间歇性热浪和战时条件,对老年人来说具有重大健康风险,可能导致多器官功能障碍和慢性健康问题.
- 老年人群特别容易受到热应激的有害影响,因此需要更深入地了解其对生理系统的影响.
研究的目的:
- 在老年小鼠遭受热应激时,研究肝脑轴障碍背后的分子机制.
- 确定关键的分子介质和信号通路,参与肝脏和大脑对热应激反应.
主要方法:
- 利用一个暴露于周期性热应激的老老鼠模型.
- 采用高通量测序来分析大脑和肝脏组织中的转录组概况.
- 研究基因表达模式和相关的信号通路,包括炎症和保护性反应.
主要成果:
- 在热应激后,在脑和肝脏组织中确定了不同的基因表达模式.
- 观察到促进炎症分子 (S100B,IL-17,IL-33) 和肝损伤通路的上调,以及保护通路的下调 (烯碳化合物受体信号传递).
- 突出了Orosomucoid 2 (ORM2) 作为肝脑轴的关键调解器,肝脏分泌量增加可能与肠道炎症和失生症有关.
结论:
- 热应激会导致肝脑轴的显著变化,其特征是协调网络激活和肝脏ORM2分泌量的增加.
- 升高的ORM2水平可能会损害血脑屏障的完整性,导致神经炎症和老年人突触可塑性受损.
- 这些发现强调了多器官交叉通话在调解热应激不良影响方面的关键作用,并提出了减轻长期并发症的潜在治疗目标.
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