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© Research
Publication : The New biologist

Stimulation of protein kinase C or protein kinase A mediated signal transduction pathways shows three modes of response among serum inducible genes

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The New biologist - 01 Dec 1989

Mechta F, Piette J, Hirai SI, Yaniv M

Link to Pubmed [PMID] – 2562123

New Biol. 1989 Dec;1(3):297-304

Activation of the signal transduction pathways mediated by protein kinase A (PKA) or protein kinase C (PKC) led to different responses of several serum inducible genes including the jun gene family, c-fos, c-myc, krox 20 and krox 24. Whereas all of these genes were stimulated by the phorbol ester TPA, a chemical activator of protein kinase C, they were differently regulated upon cAMP stimulation of the PKA dependent pathway. The proto-oncogenes jun B, c-fos, and to a lesser extent jun D were stimulated by increasing the intracellular concentration of cAMP, whereas the TPA stimulation of c-jun and c-myc was inhibited under these conditions. Krox 20 and krox 24 were insensitive to this second messenger. This study allowed us to classify these growth stimulated genes into three distinct groups distinguished by their sensitivity to elevated concentrations of intracellular cAMP. The inhibition of c-jun and c-myc expression in the presence of increased cAMP levels may be at least partially responsible for the growth inhibitory effect of this agent in Balb/c-3T3 cells.

http://www.ncbi.nlm.nih.gov/pubmed/2562123