[Radioautographic study of the localization of 3H-estradiol, 3H-histamine, and 3H-cyclic adenosine monophosphate in rat uterus].

The method of radioautography has demonstrated that 3H-estradiol adheres to the nuclei of some myometrium cells, 3H-histamine is accepted by the cytoplasm of the majority of the myometrium cells, 3H-cyclic-AMP is selectively bound by the endothelial cells of capillaries and small vessels in all layers of the uterus. From the data obtained it is possible to conclude that estradiol and its mediators, histamine and cyclic-AMP, specifically interact with different cells and with different cell structures.