Mitotic activity of gonadotropes in the anterior pituitary of the castrated male rat
- PMID: 3995551
- DOI: 10.1007/BF00222334
Mitotic activity of gonadotropes in the anterior pituitary of the castrated male rat
Abstract
The proliferation of gonadotropes in the anterior pituitary of the castrated male rat was examined immunohistochemically after colchicine treatment. The results show a more than 10-fold increase in mitotic frequency in gonadotropes 1 or 2 weeks after castration, as compared with controls. This result explains the increase in the population of immunoreactive LH cells in castrated male rats. The gonadotropes decreased significantly 1 month after castration. The mitotic activity of gonadotropes was almost completely suppressed in castrates implanted with a silastic tube filled with testosterone.