Effects of centrally administered pituitary adenylate cyclase-activating polypeptide on c-fos gene expression and heteronuclear RNA for vasopressin in rat paraventricular and supraoptic nuclei

被引：37

作者：

Nomura, M ^{[1
]}

Ueta, Y ^{[1
]}

Serino, R ^{[1
]}

Yamamoto, Y ^{[1
]}

Shibuya, I ^{[1
]}

Yamashita, H ^{[1
]}

机构：

[1] Univ Occupat & Environm Hlth, Sch Med, Dept Physiol, Yahatanishi Ku, Kitakyushu, Fukuoka 8078555, Japan

来源：

NEUROENDOCRINOLOGY | 1999年 / 69卷 / 03期

关键词：

pituitary adenylate cyclase-activating peptide; paraventricular nucleus; supraoptic nucleus; vasopressin; c-fos;

D O I：

10.1159/000054416

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

The effects of intracerebroventricular (i.c.v.) administration of pituitary adenylate cyclase-activating polypeptide (PACAP) on the expression of c-fos gene as well as heteronuclear (hn) RNA for arginine vasopressin (AVP) in paraventricular (PVN) and supraoptic nuclei (SON) of rats were investigated by immunohistochemistry for c-fos protein (Fos) and in situ hybridization histochemistry for c-fos mRNA and AVP hnRNA. The i.c.v. administration of PACAP (200 pmol/rat) caused a marked induction of Fos-like immunoreactivity (LI) in PVN and SON. The nuclear Fos-LI existed in AVP-LI containing cells in the PVN and SON. The expression of the c-fos gene in the PVN and SON was increased in a dose-related manner 30 min after i.c.v. administration of PACAP. PACAP-induced expression of the c-fos gene was significantly reduced by pretreatment with a PACAP receptor antagonist, PACAP-(6-38)-NH2. In addition, Fos-LI and the expression of the c-fos gene were also observed in the periventricular region of the third ventricle after i.c.v. administration of PACAP. The induction of c-fos gene expression in the PVN and SON reached a maximum 30 min after PACAP administration. The expression of c-fos gene in the PVN and SON induced by i.c.v. administration of vasoactive intestinal peptide (200 pmol/rat) was weaker than that induced by PACAP. The hnRNA for AVP in the PVN and SON was significantly increased 30 min after i.c.v. administration of PACAP (200 pmol/rat). Our results suggest that PACAP activates PVN and SON neurons via PACAP receptors and, in parallel, transcription of the AVP gene in the PVN and SON.

引用

页码：167 / 180

页数：14