The relationship between cytosolic free [Ca2+]i concentration and intracellular cAMP of platelet at various stages of experimental atherosclerosis in rabbits.

The relationship between cytosolic free [Ca2+]i and intracellular cAMP of platelet at various stages of experimental atherosclerosis in rabbits was studied. The results showed that the increase of [Ca2+]i was negatively correlated with the level of cAMP in cholesterol-fed rabbits (r = -0.667, P < 0.001) for 2, 4, 8 and 12 weeks. The viscosity of the whole blood at shear rates of 230.4/s and 5.76/s increased only in rabbits fed with cholesterol for 2 weeks, but the plasma viscosity increased in those fed for 2 and 4 weeks.