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首页> 外文期刊>Molecular and cellular neurosciences >A single brain-derived neurotrophic factor injection modifies hypothalamo-pituitary-adrenocortical axis activity in adult male rats.
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A single brain-derived neurotrophic factor injection modifies hypothalamo-pituitary-adrenocortical axis activity in adult male rats.

机译:单次脑源性神经营养因子注射可以改变成年雄性大鼠的下丘脑-垂体-肾上腺皮质轴活动。

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摘要

Immobilization stress induces in adult male rats rapid activation of brain derived neurotrophic factor (BDNF) expression in the hypothalamic paraventricular nucleus (PVN) preceding the increases in corticotropin releasing hormone (CRH) and arginin-vasopressin (AVP) expression. The BDNF mRNA signal belatedly co-localizes with CRH and AVP mRNA signals in the PVN, as determined by in situ hybridization. Intracerebroventricular BDNF injections (5 mug/rat) in non-anesthetized adult male rats induce a gradual increase in the CRH mRNA signal whereas AVP mRNA signal progressively decreases in the parvocellular and magnocellular PVN portions. At the same time, the CRH hypothalamic content decreases while the AVP content increases. These variations are accompanied by increases in ACTH and corticosterone plasma concentrations. These results strongly suggest that BDNF could be a stress-responsive intercellular messenger since when it is exogenously administered acts as an important and early component in the activation and recruitment of hypothalamic CRH and AVP neurons.
机译:固定应激在成年雄性大鼠中诱导下丘脑室旁核(PVN)中脑源性神经营养因子(BDNF)表达的快速激活,然后促肾上腺皮质激素释放激素(CRH)和精氨酸加压素(AVP)表达增加。通过原位杂交确定,BDNF mRNA信号与CRH和AVP mRNA信号在PVN中共同定位。未麻醉的成年雄性大鼠的脑室内BDNF注射(5杯/大鼠)导致CRH mRNA信号逐渐增加,而AVP mRNA信号在小细胞和大细胞PVN部分逐渐降低。同时,CRH下丘脑含量减少而AVP含量增加。这些变化伴随着ACTH和皮质酮血浆浓度的增加。这些结果强烈表明,BDNF可能是应激反应的细胞间信使,因为当外源施用时,它是下丘脑CRH和AVP神经元激活和募集的重要且早期的组成部分。

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