[Corticosteroid mechanism as a leading element of the thymotropic effect of oxythiamine in the rat].

Oxythiamine B1-hypovitaminosis in adrenalectomized male rats is not accompanied by acute thymus involution. This is not so much related to hypocorticoidism per se, as to a decrease in metabolic potencies of the antivitamin, particularly to a negligible depression of thymocyte tolerance to hydrocortisone. Sex differences in morphological parameters of thymus lymphopoiesis have been found after adrenalectomy.