前额皮质内源性大麻素、应激可控性和韧性:一个假说。
Prefrontal endocannabinoids, stress controllability and resilience: A hypothesis.
机构信息
Department of Psychology, Boston College, Chestnut Hill, MA, USA.
Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
出版信息
Prog Neuropsychopharmacol Biol Psychiatry. 2018 Jul 13;85:180-188. doi: 10.1016/j.pnpbp.2017.04.004. Epub 2017 Apr 7.
Stressor exposure is a predisposing risk factor for many psychiatric conditions such as PTSD and depression. However, stressors do not influence all individuals equally and in response to an identical stressor some individuals may be vulnerable while others are resilient. While various biological and behavioral factors contribute to vulnerability versus resilience, an individual's degree of control over the stressor is among the most potent. Even with only one experience with control over stress, behavioral control has been shown to have acute and long-lasting stress-mitigating effects. This suggests that control both blunts the response to acute stress and prepares the subject to be resilient to future stressors. In this review, we first summarize the evidence which suggests the ventromedial prefrontal cortex (vmPFC) is a critical component of stressor controllability circuits and a locus of neuroplasticity supporting the acute and long-lasting consequences of control. We next review the central endocannabinoid (eCB) system as a possible mediator of short and long-term synaptic transmission in the vmPFC, and offer a hypothesis whereby eCBs regulate vmPFC circuits engaged when a subject has control over stress and may contribute to the encoding of acute stress coping into long lasting stressor resilience.
应激源暴露是许多精神疾病(如创伤后应激障碍和抑郁症)的易感风险因素。然而,应激源并不会平等地影响所有个体,对于相同的应激源,一些个体可能易受影响,而另一些个体则具有韧性。虽然各种生物和行为因素会导致易感性和韧性的差异,但个体对应激源的控制程度是其中最有力的因素之一。即使只有一次控制应激源的经历,行为控制也已被证明具有急性和长期的缓解应激的效果。这表明控制既可以减轻对急性应激的反应,又可以使个体对未来的应激源具有韧性。在这篇综述中,我们首先总结了证据,表明腹内侧前额叶皮层(vmPFC)是应激源可控性回路的关键组成部分,也是支持控制的急性和长期后果的神经可塑性的一个位置。接下来,我们回顾了中央内源性大麻素(eCB)系统作为 vmPFC 中短期和长期突触传递的可能介质,并提出了一个假设,即 eCB 调节 vmPFC 回路,当个体对应激源具有控制时,这些回路会被激活,并且可能有助于将急性应激应对编码为长期应激源韧性。