Protein kinase C and adenylate cyclase as targets for growth inhibition of human gastric cancer cells.

Abstract:

:In the human gastric adenocarcinoma cell line AGS the effects of the protein-kinase-C-activating phorbol ester 12-O-tetradecanoylphorbol 13-acetate (TPA), the protein kinase C inhibitor staurosporine, the adenylate-cyclase activating agent forskolin, and the permeable dibutyryl-adenosine 3',5'-monophosphate (Bt2cAMP) on the proliferation were assessed. Cell counting followed 5 days of incubation. Prolonged activation of protein kinase C by TPA, inhibition of protein kinase C by staurosporine, activation of adenylate cyclase by forskolin or a direct increase of the intracellular cAMP level all result in a dose-dependent growth inhibition of AGS gastric tumour cells. Half-maximal inhibition was achieved at 100 pM for TPA, 1 nM for staurosporine, 20 microM for forskolin, and 600 microM for Bt2cAMP. It is concluded that protein kinase C and adenylate cyclase play a fundamental role in the growth of AGS gastric cancer cells. Interference with these enzymes involved in the signal transduction of growth regulation in tumour cells may represent a target in the development of new antiproliferative principles.

authors

Piontek M,Hengels KJ,Porschen R,Strohmeyer G

doi

10.1007/BF01195338

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

697-9

issue

12

eissn

0171-5216

issn

1432-1335

journal_volume

119

pub_type

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