慢性社会失败 压力增加男性小鼠大脑对格林的透性
Andrea Smith1, Brenna MacAulay1, Jessica Scheufen1
1Department of Neuroscience, Carleton University, Ottawa, Ontario K1S5B6, Canada.
eNeuro
|June 27, 2024
概括
慢性压力增加了 ghrelin 激素进入大脑的速度,影响了养和奖励系统. 这是由于血脑屏障的透性增加而发生的,这使得格林可以到达更多的大脑区域.
科学领域:
- 神经内分泌学神经内分泌学
- 压力生理学 压力生理学
- 代谢调节 代谢调节 代谢调节
背景情况:
- 胃激素格雷林刺激了食,并且在慢性压力下升高.
- 格林林通过大脑调节食欲的区域中的生长激素分泌受体 (GHSR) 起作用.
- 格林的进入大脑通常仅限于周腹器官,不是广泛分布的GHSR表达区域.
研究的目的:
- 为了研究慢性社会压力是否会提高格林素穿越血脑屏障的能力.
- 为了确定压力诱导的血脑屏障的透性是否允许格林蛋白到达脑部外海马体区域.
- 为了探索 ghrelin 增加的大脑透对奖励通路中神经活动的影响.
主要方法:
- 小鼠接受了21天的社会失败压力.
- 周围注射的Cy5-标记的格林类比被用于跟踪大脑的进入.
- 组织学分析评估了林分布,FOS表达 (神经活动标志物) 和星球细胞形态.
主要成果:
- 长期受到压力的小鼠在下丘脑,海马和中脑区域的格林光度增加.
- 格林林注射在受压力小鼠的奖励相关大脑区域中增加了FOS表达.
- 在ARC-中位突出结处减少的星球细胞分支表明血脑屏障的透性增加.
结论:
- 慢性心理社会压力有助于格林通过血脑屏障.
- 在压力期间, ghrelin 进入大脑的增加可能会影响养和奖励电路.
- 这种机制凸显了代谢挑战如何改变神经内分泌信号.
相关概念视频
Stress and Mental Health
1.7K
Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
Individuals with depression often experience challenges in both their personal and professional...
Individuals with depression often experience challenges in both their personal and professional...
1.7K
Gut-Brain Axis
222
The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such...
222


