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Effect of insulin on the growth pattern and adenylate cyclase activity of BHK fibroblasts
Abstract:
BHK 21/13 fibroblasts grown in the presence of insulin show some characteristics of a transformed strain. Cells broaden, cross each other intricately, and form colonies on both polystyrene dishes and soft agar. The effect of insulin is prevented by addition of N(6)-butyryl adenosine 3':5'-cyclic monophosphate and theophylline to the culture medium. Insulin causes a decrease in the concentration of intracellular adenosine 3':5'-cyclic monophosphate and inhibition of adenylate cyclase activity in BHK fibroblast membranes. This inhibition is observed at insulin concentrations of 0.1 nM or higher.
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