Stressor-responsive central nesfatin-1 activates corticotropin-releasing hormone, noradrenaline and serotonin neurons and evokes hypothalamic-pituitary-adrenal axis.

Stressor-responsive central nesfatin-1 activates corticotropin-releasing hormone, noradrenaline and serotonin neurons and evokes hypothalamic-pituitary-adrenal axis.
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DOI:
10.18632/aging.100207
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发表时间:
2010-11
期刊:
Aging
影响因子:
--
通讯作者:
Yada T
Yada T
中科院分区:
其他
文献类型:
--
作者:
Yoshida N;Maejima Y;Sedbazar U;Ando A;Kurita H;Damdindorj B;Takano E;Gantulga D;Iwasaki Y;Kurashina T;Onaka T;Dezaki K;Nakata M;Mori M;Yada T

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最近发现的饱腹感分子 nesfatin-1 位于下丘脑和脑干的神经元中,并与压力相关物质、促肾上腺皮质激素释放激素 (CRH)、催产素、阿片黑皮素原、去甲肾上腺素 (NA) 和 5-羟色胺 (5-HT) 共存。脑室内 (icv) 给予 nesfatin-1 会产生与恐惧相关的行为,并增强应激源引起的大鼠血浆促肾上腺皮质激素 (ACTH) 和皮质酮水平的增加。这些发现表明 nesfatin-1 与压力之间存在联系。在本研究中,我们旨在进一步阐明nesfatin-1诱导大鼠应激反应的神经元网络。束缚应激诱导下丘脑室旁核 (PVN) 和视上核 (SON) 以及脑干孤束核 (NTS)、蓝斑 (LC) 和中缝背核 (DR) nesfatin-1 免疫反应性神经元中的 c-Fos 表达,且不改变血浆 nesfatin-1 水平。 Icv nesfatin-1 诱导 PVN、SON、NTS、LC、DR 和中缝核(包括 PVN-CRH、NTS-NA、LC-NA 和 DR-5-HT 神经元)中的 c-Fos 表达。 Nesfatin-1 增加了从 PVN 分离的 CRH 免疫反应性神经元中的胞质 Ca2+ 浓度。 Icv nesfatin-1 增加血浆 ACTH 和皮质酮水平。这些结果表明,中枢nesfatin-1系统受到应激刺激,激活CRH、NA和5-HT神经元以及下丘脑-垂体-肾上腺轴,引起中枢和外周应激反应。
A recently discovered satiety molecule, nesfatin-1, is localized in neurons of the hypothalamus and brain stem and colocalized with stress-related substances, corticotropin-releasing hormone (CRH), oxytocin, proopiomelanocortin, noradrenaline (NA) and 5-hydroxytryptamine (5-HT). Intracerebroventricular (icv) administration of nesfatin-1 produces fear-related behaviors and potentiates stressor-induced increases in plasma adrenocorticotropic hormone (ACTH) and corticosterone levels in rats. These findings suggest a link between nesfatin-1 and stress. In the present study, we aimed to further clarify the neuronal network by which nesfatin-1 could induce stress responses in rats. Restraint stress induced c-Fos expressions in nesfatin-1-immunoreactive neurons in the paraventricular nucleus (PVN) and supraoptic nucleus (SON) of the hypothalamus, and in the nucleus of solitary tract (NTS), locus coeruleus (LC) and dorsal raphe nucleus (DR) in the brain stem, without altering plasma nesfatin-1 levels. Icv nesfatin-1 induced c-Fos expressions in the PVN, SON, NTS, LC, DR and median raphe nucleus, including PVN-CRH, NTS-NA, LC-NA and DR-5-HT neurons. Nesfatin-1 increased cytosolic Ca2+ concentration in the CRH-immunoreactive neurons isolated from PVN. Icv nesfatin-1 increased plasma ACTH and corticosterone levels. These results indicate that the central nesfatin-1 system is stimulated by stress and activates CRH, NA and 5-HT neurons and hypothalamic-pituitary-adrenal axis, evoking both central and peripheral stress responses.
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