Title : Phorbol ester synergizes with Ca2+ ionophore in activation of protein kinase C (PKC)alpha and PKC beta isoenzymes in human T cells and in induction of related cellular functions.

Pub. Date : 1992 Jul

PMID : 1388136






6 Functional Relationships(s)
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1 TPA-induced T-cell proliferation, expression of interleukin-2 receptor-alpha subunit (IL-2R alpha) and transferrin receptor, CD3 down-regulation and, lastly, the cytosol-to-membrane PKC translocation (determined by an enzymatic assay or by immunoblotting with a cross-reactive anti-PKC peptide antibody) were all facilitated by ionomycin. Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens
2 TPA-induced T-cell proliferation, expression of interleukin-2 receptor-alpha subunit (IL-2R alpha) and transferrin receptor, CD3 down-regulation and, lastly, the cytosol-to-membrane PKC translocation (determined by an enzymatic assay or by immunoblotting with a cross-reactive anti-PKC peptide antibody) were all facilitated by ionomycin. Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens
3 Immunoblots with isoenzyme-specific anti-PKC monoclonal antibodies demonstrated expression of immunoreactive PKC alpha, PKC beta and PKC gamma proteins that were translocated to the membrane upon TPA plus ionomycin stimulation. Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens
4 Immunoblots with isoenzyme-specific anti-PKC monoclonal antibodies demonstrated expression of immunoreactive PKC alpha, PKC beta and PKC gamma proteins that were translocated to the membrane upon TPA plus ionomycin stimulation. Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens
5 Ionomycin synergized with TPA in increasing the expression of PKC alpha and PKC beta mRNA. Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens
6 Moreover, the combined effects of TPA and ionomycin on T-cell function and cell-surface antigen expression appear to be due, at least in part, to their synergistic activation of distinct PKC isoenzyme(s). Tetradecanoylphorbol Acetate protein kinase C alpha Homo sapiens