Abstract
To clarify the biological significance of platelet-derived growth factor (PDGF) in human decidual cell function, which is important for the maintenance of pregnancy, we investigated gene expression of the PDGF subunits, PDGF-A and PDGF-B, specific binding of the PDGF isoform, and the effect of PDGF dimers on DNA synthesis in human decidual cells. We detected in decidua from early pregnancy the expected DNA bands of PDGF-A and PDGF-B by reverse transcriptase-polymerase chain reaction (RT-PCR) as well as mRNAs of each PDGF subunit by Northern blot hybridization, demonstrating that both PDGF subunits exist in this tissue. Scatchard plot analysis showed that decidual cells had both PDGF- α and PDGF- β receptors. PDGF-AA, -AB and -BB stimulated [ 3H]-thymidine incorporation in cultured decidual cells in a dose-dependent manner. These results indicate the importance of PDGF in human decidua.
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