Metabotropic glutamate receptor/phospholipase C pathway is increased in rat brain at the end of pregnancy

被引：5

作者：

Leon, D. ^{[1
]}

Castillo, C. A. ^{[1
]}

Ruiz, M. A. ^{[1
]}

Albasanz, J. L. ^{[1
]}

Martin, M. ^{[1
]}

机构：

[1] Univ Castilla La Mancha, Ctr Reg Invest Biomed, Fac Quim, Area Bioquim, E-13071 Ciudad Real, Spain

来源：

NEUROCHEMISTRY INTERNATIONAL | 2007年 / 50卷 / 05期

关键词：

metabotropic glutamate receptor; phospholipase C; G(q/11) protein; pregnancy;

D O I：

10.1016/j.neuint.2006.12.012

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Wistar pregnant rats were sacrificed at the end of pregnancy and the status of metabotropic glutamate receptors/phospholipase C (mGluR/PLC) pathway was studied in brain from pregnant and non-pregnant female rats. Pregnancy causes a significant increase in metabotropic glutamate receptors number, determined by radioligand binding assay, without significant changes on receptor affinity. Similar increase in mGluR(1) type was obtained by immunoblotting assay using specific anti-mGluR(1) antibody. However, no significant differences were observed in mGluR(5) type, suggesting that the increase detected by radioligand assays could be due to mGluR(1) up-regulation. On the other hand, a significant increase in the alpha subunit of G(q) protein was also detected in pregnant rats by immunoblotting assays. Real-time PCR experiments revealed a significant increase in gene expression of metabotropic glutamate receptors and G(q) proteins. Neither protein level nor gene expression of phospholipase C beta(1) isoform was altered in pregnant rats. However, an increase in basal and agonist-stimulated phospholipase C activity was observed in membranes from pregnant rats. These results suggest that gestational period causes the up-regulation of both metabotropic glutamate receptors and coupled G(q)-protein and, in turn, an increase in phospholipase C activity. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：681 / 688

页数：8

共 54 条

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