[Effect of glucocorticoids on the Ca2+ concentration in the cytoplasm of thymocytes].

Using the fluorescent dye, quin-2, it was shown that the addition of cortisol, dexamethasone (10(-5)-10(-4) M) to the suspension of rat thymocytes results in 1.5-3-fold increase of free Ca2+ concentration in the cytoplasm (intracellular Ca2+). The hormone-stimulated increase of intracellular Ca2+ fails to occur if extracellular Ca2+ concentration is sharply reduced by using calcium-free buffer.