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. 1990 Mar 15;266(3):661–667. doi: 10.1042/bj2660661

Activation of inositol phospholipid breakdown by prostaglandin F2 alpha without any stimulation of proliferation in quiescent NIH-3T3 fibroblasts.

F M Black 1, M J Wakelam 1
PMCID: PMC1131190  PMID: 2327955

Abstract

Stimulation of NIH-3T3 cells with prostaglandin F2 alpha (PGF2 alpha) caused a dose- and time-dependent generation of inositol phosphates. The first detectable changes were in the levels of Ins(1,4,5)P3 and Ins(1,3,4,5)P4. Increases in Ins(1,3,4)P3, InsP2 and InsP were detected later, and only minor changes were observed in putative InsP5 or InsP6. The accumulation of inositol phosphates was synergistically increased by the addition of calf serum, whereas PGF2 alpha had no effects on cell proliferation in either the presence or the absence of calf serum. Stimulation of a different clone of NIH-3T3 cells (AmNIH-3T3) or Swiss 3T3 cells with PGF2 alpha resulted in both inositol phospholipid breakdown and cell proliferation. No differences were found in the characteristics of PGF2 alpha-stimulated inositol phosphate generation between the two clones of NIH-3T3 cells, nor was there any difference in receptor number of Kd. These results question the role of inositol phospholipid breakdown in mitogenesis and demonstrate significant differences in the biochemical properties of apparently the 'same' cells.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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