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THE EFFECTS OF BRAIN AND C-TYPE NATRIURETIC PEPTIDES ON CORTICOTROPIN-RELEASING FACTOR IN BRAIN OF RATS

机译:脑和C型钠尿肽对大鼠脑中促肾上腺皮质激素释放因子的影响

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The central corticotropin-releasing factor (CRF)-ergic system plays a critical role in anxiety and other behavioral stress responses. It has been shown that atrial (ANP), brain (BNP) and C-type (CNP) natriuretic peptides exert anxiolytic-like effects in behavioral studies. Our previous findings demonstrated that various doses of centrally administered ANP selectively altered the CRF content in different brain areas. In the present study, CRF immunoreactivity was determined in hypothalamic and extrahypothalamic brain regions after central injection of BNP or CNP in rats. A high dose (400 ng) of BNP significantly increased the CRF-like immunoreactivity (CRF-LI) in the hypothalamus and amygdala, while only a tendency towards an increase was found in the hippocampus. In the hypothalamus, the CRF-LI decreased after a high dose (400 ng) of CNP. The CRF-LI increased in the basal forebrain after a low dose (100 ng) of CNP. These results suggest that CRF may be involved in the mediation of some neuroendocrine and behavioral responses to BNP and CNP. [References: 41]
机译:中枢促肾上腺皮质激素释放因子(CRF)的能量系统在焦虑和其他行为应激反应中起关键作用。研究表明,在行为研究中,心房(ANP),脑(BNP)和C型(CNP)利钠肽发挥抗焦虑作用。我们以前的发现表明,不同剂量的中央给药ANP选择性改变了不同大脑区域的CRF含量。在本研究中,在大鼠中央注射BNP或CNP后,在下丘脑和下丘脑的大脑区域确定了CRF免疫反应性。高剂量(400 ng)的BNP可显着增加下丘脑和杏仁核中的CRF样免疫反应性(CRF-LI),而在海马中仅发现增加的趋势。在下丘脑中,高剂量(400 ng)的CNP后CRF-LI下降。低剂量(100 ng)的CNP后基底前脑中的CRF-LI升高。这些结果表明,CRF可能参与了某些神经内分泌的介导以及对BNP和CNP的行为反应。 [参考:41]

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