Effect of anticalmodulin and antitubulin on LDL-receptor synthesis in aortic smooth muscle cells cultured in vitro.

Effect of trifluoperazine and colchicine on LDL-receptor synthesis in smooth muscle cells exposed to hypercholesterolemic medium in vitro have been studied. While trifluoperazine at 25 microM concentration caused stimulation of LDL-receptor synthesis, colchicine acted as a dose-dependent inhibitor of LDL-receptor synthesis. Thus calmodulin down regulates LDL-receptor synthesis independent of microtubular involvement.