Carbachol-induced desensitization of PLC-β pathway in rat myometrium: downregulation of Gqα/G11α.
Carbachol-induced desensitization of PLC-β pathway in rat myometrium: downregulation of Gqα/G11α.
复制标题
卡巴胆碱诱导大鼠子宫肌层 PLC-β 通路脱敏:Gqα/G11α 下调。
DOI:
--
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发表时间:
1998
期刊:
影响因子:
--
通讯作者:
Z. Tanfin
中科院分区:
文献类型:
--
作者:
S. Lajat;S. Harbon;Z. Tanfin
In the estrogen-treated rat myometrium, carbachol increased the generation of inositol phosphates by stimulating the muscarinic receptor-Gq/G11-phospholipase C-β3 (PLC-β3) cascade. Exposure to carbachol resulted in a rapid and specific (homologous) attenuation of the subsequent muscarinic responses in terms of inositol phosphate production, PLC-β3 translocation to membrane, and contraction. Refractoriness was accompanied by a reduction of membrane muscarinic binding sites and an uncoupled state of residual receptors. Protein kinase C (PKC) altered the functionality of muscarinic receptors and contributed to the initial period of desensitization. A delayed phase of the muscarinic refractoriness was PKC independent and was associated with a downregulation of Gqα/G11α. Atropine failed to induce desensitization as well as Gqα/G11α downregulation, indicating that both events involve active occupancy of the receptor. Prolonged exposure to A[Formula: see text] reduced subsequent A[Formula: see text] as well as carbachol-mediated inositol phosphate responses and similarly induced downregulation of Gqα/G11α. Data suggest that a decrease in the level of Gqα/G11α is subsequent to its activation and may account for heterologous desensitization.
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影响因子:
4.8
作者:
C. Ku;Ansha Qian;Yeshao Wen;Khursheed Anwer;Barbara M. Sanborn
通讯作者:
C. Ku;Ansha Qian;Yeshao Wen;Khursheed Anwer;Barbara M. Sanborn
DOI:
--
发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Green,A;Johnson,JL;Milligan,G
通讯作者:
Milligan,G
DOI:
10.1042/bj3220001
发表时间:
1997-02
期刊:
The Biochemical journal
影响因子:
--
作者:
S. Böhm;E. Grady;N. Bunnett
通讯作者:
S. Böhm;E. Grady;N. Bunnett
影响因子:
6.1
作者:
Hosey,MM;Benovic,JL;DebBurman,SK;Richardson,RM
通讯作者:
Richardson,RM
DOI:
--
发表时间:
1996
期刊:
Molecular pharmacology.
影响因子:
--
作者:
Kai,H;Fukui,T;Lassegue,B;Shah,A;Minieri,CA;Griendling,KK
通讯作者:
Griendling,KK