之前暴露于压力会加剧神经炎症,并导致败血症的长期行为变化
Mariko Miyao1, Akiko Hirotsu1, Kenichiro Tatsumi1
1Department of Anesthesia, Kyoto University Hospital, 54 Kawahara-Cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
Heliyon
|July 24, 2023
概括
之前的心理压力会加剧败血症引起的神经炎症和脑损伤. 压力加剧炎症反应,并导致老鼠长期的焦虑类行为.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 病理学 病理学 病理学
背景情况:
- 神经炎症是与败血症相关的中枢神经系统 (CNS) 疾病的关键因素.
- 心理压力也是神经炎症的已知触发因素.
- 该研究调查了先前的压力如何影响败血症诱导的神经炎症和中枢神经系统症状.
研究的目的:
- 为了确定先前应激暴露对败血症诱导的神经炎症的影响.
- 分析压力对中枢神经系统在败血症后的症状的影响.
- 为了研究压力加剧的神经炎症背后的分子机制.
主要方法:
- Balb/c小鼠被暴露在压力 (湿床) 下,随后给予脂多糖 (LPS).
- 通过分析预炎性细胞因子表达 (IL-1β,IL-6,TNFα) 和NF-κB活性来评估神经炎症.
- 进行了免疫组织化学 (Iba-1) 和行为测试,以评估微质激活和行为变化.
主要成果:
- 应激暴露在LPS后大脑皮层的IL-1β,IL-6和TNFαmRNA上调.
- 压力显著增强了LPS诱导的大脑中的NF-κB激活.
- 大脑皮层中的微质激活因压力而增加,并因LPS而进一步放大.
- 经过压力大小小的小鼠在LPS治疗后一个月表现出增加的焦虑类行为.
结论:
- 之前的压力暴露加剧了败血症诱导的神经炎症.
- 压力有助于长期的行为变化,包括焦虑,在败血症之后.
- 这些发现强调了心理压力在调节对败血症的神经炎症反应中的关键作用.
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