Differential Regulation of Corticotropin-Releasing Hormone and Vasopressin Gene Transcription in the Hypothalamus by Norepinephrine

Differential Regulation of Corticotropin-Releasing Hormone and Vasopressin Gene Transcription in the Hypothalamus by Norepinephrine
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去甲肾上腺素对下丘脑促肾上腺皮质激素释放激素和加压素基因转录的差异调节

DOI:
10.1523/jneurosci.19-13-05464.1999
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发表时间:
1999
期刊:
The Journal of Neuroscience
影响因子:
--
通讯作者:
S. Watson
S. Watson
中科院分区:
--
文献类型:
--
作者:
K. Itoi;D. Helmreich;M. O. Lõpez;S. Watson

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所有与压力相关的输入都通过几个大脑区域传递到下丘脑,并整合到合成促肾上腺皮质激素释放激素(CRH)的室旁核(PVN)的小细胞分裂中。精氨酸加压素 (AVP) 存在于 PVN 的大细胞和小细胞分裂中,并且 AVP 的后者群体与 CRH 共定位。 CRH和AVP在面对某些应激刺激时共同分泌,并且这两种肽的合成均被糖皮质激素抑制。 CRH 和 AVP 协同刺激促肾上腺皮质激素 (ACTH) 分泌,但双重促肾上腺皮质激素调节的生理相关性尚不清楚。去甲肾上腺素 (NE) 是一种众所周知的神经递质,可调节 PVN 中的 CRH 神经元。我们探索了 NE 对 PVN 中 CRH 和 AVP 基因转录的作用模式,以检查神经递质对负责共同生理功能的多个基因的影响。将NE注射到清醒大鼠的PVN后,PVN细细胞分裂中的CRH异核(hn) RNA迅速且显着增加。注射 NE 后,AVP hnRNA 在 PVN 的小细胞或大细胞分裂中均没有显着变化。目前的结果表明,CRH 和 AVP 基因的转录受到 NE 的差异调节,表明在离散的下丘脑神经元群体中多种释放激素基因的神经递质调节的复杂性。
All stress-related inputs are conveyed to the hypothalamus via several brain areas and integrated in the parvocellular division of the paraventricular nucleus (PVN) where corticotropin-releasing hormone (CRH) is synthesized. Arginine vasopressin (AVP) is present in both magnocellular and parvocellular divisions of the PVN, and the latter population of AVP is colocalized with CRH. CRH and AVP are co-secreted in the face of certain stressful stimuli, and synthesis of both peptides is suppressed by glucocorticoid. CRH and AVP stimulate corticotropin (ACTH) secretion synergistically, but the physiological relevance of the dual corticotroph regulation is not understood. Norepinephrine (NE) is a well known neurotransmitter that regulates CRH neurons in the PVN. We explored the mode of action of NE on CRH and AVP gene transcription in the PVN to examine the effect of the neurotransmitter on multiple genes that are responsible for a common physiological function. After NE injection into the PVN of conscious rats, CRH heteronuclear (hn) RNA increased rapidly and markedly in the parvocellular division of the PVN. AVP hnRNA did not change significantly in either the parvocellular or magnocellular division of the PVN after NE injection. The present results show that the transcription of CRH and AVP genes is differentially regulated by NE, indicating the complexity of neurotransmitter regulation of multiple releasing hormone genes in a discrete hypothalamic neuronal population.
蛋白激酶-C 激活可增加 NPLC 细胞中促肾上腺皮质激素释放激素信使 RNA 的数量和聚腺苷酸尾长度。
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DOI: --
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DOI: 10.1210/endo-126-6-3016
发表时间: 1990
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影响因子: 4.8
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