Cyclic AMP can partially restore platelet-derived growth factor-stimulated prostaglandin E2 biosynthesis, and calcium mobilization in EJ-ras-transformed NIH-3T3 cells.

Abstract:

:NIH-3T3 cells transformed by the EJ-ras oncogene display reduced platelet-derived growth factor (PDGF)-stimulated phospholipase C activity as measured by inositol 1,4,5-triphosphate (IP3) synthesis and Ca2+ mobilization. The lack of PDGF-stimulated Ca2+ mobilization in EJ-ras transformed cells is not due to a loss of IP3 sensitivity, because microinjected IP3 elevates intracellular Ca2+. Treatment of EJ-ras transformed cells with cholera toxin or 8-bromo-cyclic AMP, but not pertussis toxin or the beta-subunit of cholera toxin, results in a slight recovery of PDGF-stimulated IP3 synthesis, a marked increase in intracellular Ca2+ mobilization, and an almost complete recovery of prostaglandin E2 biosynthesis. These data suggest that EJ p21-mediated inhibition of PDGF-stimulated intracellular events can be partially and transiently reversed by cyclic AMP.

journal_name

J Cell Physiol

authors

Olinger PL,Benjamin CW,Gorman RR,Connor JA

doi

10.1002/jcp.1041390216

subject

Has Abstract

pub_date

1989-05-01 00:00:00

pages

335-45

issue

2

eissn

0021-9541

issn

1097-4652

journal_volume

139

pub_type

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