Activation of P2Y2 purinoceptor inhibits the activity of the Na+/K+-ATPase in HeLa cells

被引：19

作者：

Muscella, A ^{[1
]}

Elia, MG ^{[1
]}

Greco, S ^{[1
]}

Storelli, C ^{[1
]}

Marsigliante, S ^{[1
]}

机构：

[1] Univ Lecce, Dept Biol Sci & Environm Technol DiSTeBA, Cell Physiol Lab, I-73100 Lecce, Italy

来源：

CELLULAR SIGNALLING | 2003年 / 15卷 / 01期

关键词：

ATP; HeLa; Na+/K+ ATPase;

D O I：

10.1016/S0898-6568(02)00062-1

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

The role of ATP on regulation of the Na+/K+-ATPase activity in the human cancerous HeLa cells was investigated. HeLa cells stimulated with increasing ATP concentrations showed a dose-dependent inhibition of the Na+/K+-ATPase activity. These effects were also obtained by UTP. ATP and UTP provoked a rise in intracellular calcium concentration ([Ca2+](i)) persisting for at least 4 min. The inhibitor of phospholipase C, U73122, blocked the elevation of [Ca2+](i) provoked by ATP/UTP. The expression of mRNA for P2Y2 and P2Y6 receptors was demonstrated by RTPCR. ATP/UTP activated PKC-alpha, -betaI and -epsilon isoforms, but not PKC-delta and -zeta. The inhibition of the Na+/K+-ATPase activity by ATP/UTP was blocked by Go6976, a specific inhibitor of the calcium-dependent PKCs. In conclusion, our results suggest that ATP/UTP modulate Na+/K+-ATPase activity in HeLa cells through the P2Y2 purinoceptor via calcium mobilisation and activation of calcium-dependent PKCs. (C) 2002 Elsevier Science Inc. All rights reserved.

引用

页码：115 / 121

页数：7

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