Phorbol diesters promote beta-adrenergic receptor phosphorylation and adenylate cyclase desensitization in duck erythrocytes.

Published

Journal Article

Preincubation of duck erythrocytes with tumor promoting phorbol diesters or catecholamines leads to attenuation of adenylate cyclase activity. 12-0-Tetradecanoyl phorbol-13-acetate (TPA) and phorbol 12,13-dibutyrate treatment induced a 38% and 30% desensitization of isoproterenol-stimulated adenylate cyclase activity, respectively. In contrast, the inactive phorbol diester, 4 alpha-phorbol 12,13-didecanoate, was without effect in promoting adenylate cyclase desensitization. The catecholamine isoproterenol induced a 51% desensitization. Incubation of 32Pi labeled erythrocytes with TPA promoted a 3- to 4-fold increase in phosphorylation of the beta-adrenergic receptor as did incubation with isoproterenol. Treatment of the cells with both TPA and isoproterenol together resulted in desensitization and receptor phosphorylation which were no greater than those observed with either agent alone. These data suggest a potential role for protein kinase C in regulating beta-adrenergic receptor function.

Full Text

Duke Authors

Cited Authors

  • Sibley, DR; Nambi, P; Peters, JR; Lefkowitz, RJ

Published Date

  • June 29, 1984

Published In

Volume / Issue

  • 121 / 3

Start / End Page

  • 973 - 979

PubMed ID

  • 6331437

Pubmed Central ID

  • 6331437

International Standard Serial Number (ISSN)

  • 0006-291X

Digital Object Identifier (DOI)

  • 10.1016/0006-291x(84)90772-1

Language

  • eng

Conference Location

  • United States