伏隔核
扁桃形结构
被盖腹侧区
前额叶皮质
缰
神经科学
海马体
海马结构
丘脑
扩大杏仁核
性二态性
慢性应激
心理学
生物
医学
内分泌学
中枢神经系统
多巴胺
认知
多巴胺能
作者
Woonhee Kim,ChiHye Chung
标识
DOI:10.1096/fj.202101287r
摘要
Mood disorders are more prevalent and often reported to be more severe in women; however, little is known about the underlying mechanisms of this sexual prevalence. To gain insight into the functional differences in female brains in response to stress, we systemically compared brain activation in male and female C57BL/6N mice after acute stress exposure. We measured c-Fos expression levels in 18 brain areas related to stress responses after a 3-h long restraint stress and found that activation was sexually dimorphic in several brain areas, including the nucleus accumbens, ventral tegmental area, nucleus reuniens, and medial part of the lateral habenula. Moreover, stress-activated a substantial number of cells in the medial prefrontal cortex, amygdala, and lateral part of the lateral habenula; however, the levels of activation were comparable in males and females, suggesting that the core stress responding machineries are largely shared. Pearson correlation analysis revealed several interesting connections between the analyzed areas that are implicated in stress responses and depression. Overall, stress strengthened intra-circuitries in the hippocampus, amygdala, and prefrontal cortex in female mice, whereas more longer-range connections were highlighted in stressed male mice. Our study provides a highly valuable neuroanatomical framework for investigating the circuit mechanism underlying the higher vulnerability to depression in women.
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