Cytochemical distribution of cyclic AMP-dependent 3',5'-nucleotide phosphodiesterase in the rat myocardium

被引：21

作者：

Okruhlicova, L ^{[1
]}

Tribulova, N ^{[1
]}

Eckly, A ^{[1
]}

Lugnier, C ^{[1
]}

Slezak, J ^{[1
]}

机构：

[1] UNIV STRASBOURG 1, LAB PHARMACOL & PHYSIOPATHOL CELLULAIRES, CNRS, ILLKIRCH GRAFFENSTADEN, FRANCE

来源：

HISTOCHEMICAL JOURNAL | 1996年 / 28卷 / 03期

关键词：

D O I：

10.1007/BF02331440

中图分类号：

Q2 [细胞生物学];

学科分类号：

071009 ; 090102 ;

摘要：

The cytochemical localization of cAMP-dependent phosphodiesterase was studied in the rat myocardium. Slices 40 mu m thick from perfusion-fixed rat hearts were incubated in the medium with cAMP as a substrate and Pb ions as a capture metal of the reaction product. After the incubation in the basic medium the specific precipitate of cAMP phosphodiesterase was localized on the sarcolemma of cardiomyocytes. In addition, it was localized on the plasmalemma of endothelial cells of capillaries and small coronary arteries as well as on the membrane of smooth muscle cells. Using selective inhibitors SK&F 94120 for phosphodiesterase III and Rolipram for the TV isoenzyme, both isoforms were detected on the membrane of smooth muscle cell. In addition, phosphodiesterase III was localized on the sarcolemma only and phosphodiesterase IV on the sarcolemma of cardiomyocytes and the plasmalemma of endothelial cells.

引用

页码：165 / 172

页数：8

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