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The activation of phospholipase D participates in the mitogenic action of arginine vasopressin in cultured rat glomerular mesangial cells. 1996

I Kusaka, and S E Ishikawa, and M Higashiyama, and T Saito, and S Nagasaka, and T Saito
Division of Endocrinology and Metabolism, Department of Medicine, Jichi Medical School, Tochigi, Japan.

The present study was undertaken to determine whether phospholipase D participates in the mitogenic action of arginine vasopressin (AVP) in cultured rat glomerular mesangial cells. AVP promptly increased the phosphatidylethanol formation in a concentration-dependent manner, which indicates the activation of phospholipase D. When cells were preincubated with 2,3-diphosphoglycerate or carbobenzyloxy-leucine-tyrosine-chloromethylketone (zLYCK), inhibitors of phospholipase D, the 1 x 10(-7) M AVP-produced phosphatidylethanol was significantly attenuated. Also, inhibitors of protein kinase C, staurosporine and calphostin C, reduced the AVP-induced increase in phosphatidylethanol. AVP activated mitogen-activated protein (MAP) kinase in a concentration-dependent manner. Such an activation was significantly reduced by 2,3-diphosphoglycerate, zLYCK, or staurosporine. Also, AVP stimulated [3H]thymidine incorporation, an effect significantly less in the presence of 2,3-diphosphoglycerate or zLYCK. Similar results were obtained with exogenous bacterial phospholipase D. Both MAP kinase and [3H]thymidine incorporation were not altered by 2,3-diphosphoglycerate or zLYCK per se. These results indicate that AVP activates phospholipase D and promotes cellular growth mediated through phospholipase D, in addition to a phospholipase C-dependent signal transduction, in glomerular mesangial cells.

UI MeSH Term Description Entries
D008297 Male Males
D008934 Mitogens Substances that stimulate mitosis and lymphocyte transformation. They include not only substances associated with LECTINS, but also substances from streptococci (associated with streptolysin S) and from strains of alpha-toxin-producing staphylococci. (Stedman, 25th ed) Mitogen,Phytomitogen,Phytomitogens
D009281 Naphthalenes Two-ring crystalline hydrocarbons isolated from coal tar. They are used as intermediates in chemical synthesis, as insect repellents, fungicides, lubricants, preservatives, and, formerly, as topical antiseptics.
D010712 Phosphatidic Acids Fatty acid derivatives of glycerophosphates. They are composed of glycerol bound in ester linkage with 1 mole of phosphoric acid at the terminal 3-hydroxyl group and with 2 moles of fatty acids at the other two hydroxyl groups. Ammonium Phosphatidate,Diacylglycerophosphates,Phosphatidic Acid,Acid, Phosphatidic,Acids, Phosphatidic,Phosphatidate, Ammonium
D010739 Phospholipase D An enzyme found mostly in plant tissue. It hydrolyzes glycerophosphatidates with the formation of a phosphatidic acid and a nitrogenous base such as choline. This enzyme also catalyzes transphosphatidylation reactions. EC 3.1.4.4. Lecithinase D,Phosphatidylcholine Phosphohydrolase
D011493 Protein Kinase C An serine-threonine protein kinase that requires the presence of physiological concentrations of CALCIUM and membrane PHOSPHOLIPIDS. The additional presence of DIACYLGLYCEROLS markedly increases its sensitivity to both calcium and phospholipids. The sensitivity of the enzyme can also be increased by PHORBOL ESTERS and it is believed that protein kinase C is the receptor protein of tumor-promoting phorbol esters. Calcium Phospholipid-Dependent Protein Kinase,Calcium-Activated Phospholipid-Dependent Kinase,PKC Serine-Threonine Kinase,Phospholipid-Sensitive Calcium-Dependent Protein Kinase,Protein Kinase M,Calcium Activated Phospholipid Dependent Kinase,Calcium Phospholipid Dependent Protein Kinase,PKC Serine Threonine Kinase,Phospholipid Sensitive Calcium Dependent Protein Kinase,Phospholipid-Dependent Kinase, Calcium-Activated,Serine-Threonine Kinase, PKC
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D004163 Diphosphoglyceric Acids Glyceric acids where two of the hydroxyl groups have been replaced by phosphates. Bisphosphoglycerates,Acids, Diphosphoglyceric
D004789 Enzyme Activation Conversion of an inactive form of an enzyme to one possessing metabolic activity. It includes 1, activation by ions (activators); 2, activation by cofactors (coenzymes); and 3, conversion of an enzyme precursor (proenzyme or zymogen) to an active enzyme. Activation, Enzyme,Activations, Enzyme,Enzyme Activations
D004791 Enzyme Inhibitors Compounds or agents that combine with an enzyme in such a manner as to prevent the normal substrate-enzyme combination and the catalytic reaction. Enzyme Inhibitor,Inhibitor, Enzyme,Inhibitors, Enzyme

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