Animals Receptors, Glucocorticoid dexamethasone glucocorticoid receptor unclassified drug Cell Line Mice animal cell article controlled study metabolism nonhuman Dexamethasone Dimerization Models, Molecular TIF2 animal cell line dimerization drug mechanism gene expression immunoprecipitation ligand binding molecular dynamics mouse oligomerization priority journal 21 hydroxy 6,19 epoxyprogesterone ANALOGOS RIGIDOS DE ESTEROIDES APOPTOSIS