Cyclic nucleotides and calcium in human lymphocytes induced to divide

Rochette-Egly, C.; Kempf, J.

Journal de Physiologie 77(6-7): 721-725

1981


ISSN/ISBN: 0021-7948
PMID: 6270320
Document Number: 171270
Intracellular concentrations of cyclic adenosine 3'-5' monophosphate (cAMP) and cyclic guanosine 3'-5' monophosphate (cGMP) were measured in human lymphocytes induced to divide by the addition of lectins, 12-O-tetra-decanoylphorbol-13-acetate (TPA) and the calcium ionophore A 23187. cGMP levels rose within minutes without concomitant alterations in cAMP concentration. The cAMP and cGMP levels rose during the prereplicative and replicative phases respectively. Under calcium depleting conditions, both the fluctuations in cyclic nucleotide levels and the increase in [3H[ thymidine incorporation into DNA were abolished, suggesting a role for calcium ions in the regulation of lymphocyte proliferation.

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