SNX27:一种跨物种的认知调节器,对焦虑和压力敏感性有影响
Gisela Armada1,2, Susana Roque1,2, Cláudia Serre-Miranda1,2
1Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal.
Neurobiology of stress
|March 19, 2024
概括
排序Nexin 27 (SNX27) 影响认知和焦虑. 在小鼠和C. elegans中减少的SNX27会导致认知缺陷和类似焦虑的行为,与神经元变化和应激反应有关.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 行为遗传学 行为遗传学
背景情况:
- 排序Nexin 27 (SNX27) 是神经系统的关键载荷适配器,影响认知和奖励过程.
- 它在神经疾病和整体大脑功能中的确切作用在很大程度上仍未被描述.
- 新出现的证据表明,SNX27功能与细胞应激信号通路之间存在联系.
研究的目的:
- 为了全面研究SNX27在神经系统中的行为和神经功能.
- 探索SNX27与细胞应激反应之间的相互作用.
- 阐明SNX27在认知调节,焦虑调节和应激易感性方面的作用.
主要方法:
- 在运动,认知和情感领域对SNX27+/-小鼠的广泛行为特征.
- 利用Caenorhabditis elegans (C. elegans) Δsnx-27突变体和野生型动物来研究SNX27压力相互作用.
- 检查了神经元结构,特别是结末端 (BNST) 和底侧桃体 (BLA) 的床核中的树突复杂性.
- 在暴露于压力后,在动物大脑区域评估SNX27水平.
主要成果:
- 在SNX27+/-小鼠和C. elegans Δsnx-27突变体中表现出显著的认知障碍,这表明SNX27在认知中发挥着保留作用.
- 在小鼠中,SNX27的下调诱导了类似焦虑的行为,与BNST和BLA神经元的树突复杂性增加相关.
- 在C. elegans中观察到SNX27功能障碍和压力敏感性之间的直接联系.
- 暴露于压力的动物在与压力敏感性相关的大脑区域中显示SNX27水平降低.
结论:
- 在调节焦虑和认知功能方面,SNX27起着至关重要的,以前被低估的作用.
- SNX27与关键焦虑相关的大脑电路 (BNST和BLA) 的结构性可塑性有关.
- SNX27功能障碍有助于压力易感性,强调其在与压力相关的神经疾病中的重要性.
相关概念视频
The Sympathetic Nervous System
95.0K
Overview
95.0K
Social Anxiety Disorder
34
Social anxiety disorder, also known as social phobia, is characterized by an intense fear of social situations where one might face humiliation, rejection, embarrassment, or negative evaluation. This disorder leads individuals to avoid activities like casual conversations, public speaking, or seemingly simple tasks such as eating, signing documents, or swimming, in public settings. Its impact extends beyond discomfort, often significantly interfering with daily functioning and quality of life.
34
Physiological Foundation of Stress
57
Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Role of the Sympathetic Nervous System
Adrenaline triggers the...
57
Psychological Responses to Stress
54
Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
54
Anxiolytic Drugs: Overview
298
Anxiolytic drugs are vital in managing anxiety disorders by effectively alleviating symptoms such as excessive fear, tachycardia, and tremors. There are several classes of anxiolytic medications, each with unique mechanisms of action and potential side effects.
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic...
Primary Types of Anxiolytic Drugs
1. Benzodiazepines:
Benzodiazepines bind to the GABA-A receptor in the brain, enhancing GABA's interaction. This action reduces neurotransmission, effectively blocking anxiety-associated limbic...
298
Stress and Mental Health
156
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...
156


