Involvement of protein kinase C signalling and mitogen-activated protein kinase in the amebocyte-producing organ of Biomphalaria glabrata (Mollusca).
Mechanisms that regulate hemocyte production in molluscs, at either the organismal or cellular levels, are not well understood. In the present study, 24-h saline cultures of the amebocyte-producing organ (APO) of the schistosome-transmitting snail Biomphalaria glabrata were used to test for the potential involvement of protein kinase C (PKC) signalling in hematopoiesis. Exposure to phorbol myristate acetate (PMA), an activator of PKC, resulted in an increase in the number of dividing hematopoietic cells in APOs from schistosome-resistant Salvador snails. PMA-induced cell division was blocked by treatment with U0126, an inhibitor of the mitogen-activated protein kinase kinase, MEK1/2. These results suggest that PKC-induced activation of the mitogen-activated protein kinase, ERK1/2, is involved in cell division in the APO.
Salamat
Zahra
Z
Department of Biology, University of San Francisco, San Francisco, CA 94117, USA.
Sullivan
John T
JT
D000818:Animals; D001700:Biomphalaria / Q000166:cytology / Q000502:physiology*; D002070:Butadienes / Q000494:pharmacology; D002478:Cells, Cultured; D006410:Hematopoiesis; D006434:Hemocytes / Q000166:cytology / Q000187:drug effects / Q000502:physiology*; D019950:Mitogen-Activated Protein Kinase 1 / Q000037:antagonists & inhibitors / Q000378:metabolism*; D048052:Mitogen-Activated Protein Kinase 3 / Q000037:antagonists & inhibitors / Q000378:metabolism*; D009570:Nitriles / Q000494:pharmacology; D011493:Protein Kinase C / Q000378:metabolism*; D047428:Protein Kinase Inhibitors / Q000494:pharmacology; D015398:Signal Transduction; D013755:Tetradecanoylphorbol Acetate / Q000494:pharmacology
D002070:Butadienes; D009570:Nitriles; D047428:Protein Kinase Inhibitors; C113580:U 0126; D011493:Protein Kinase C; D019950:Mitogen-Activated Protein Kinase 1; D048052:Mitogen-Activated Protein Kinase 3; D013755:Tetradecanoylphorbol Acetate