Abstract
SummaryThe effect of subcutaneous injection of synthetic LRF was evaluated in normal and castrated rats under tribromoethanol (TBE) anesthesia. The procedure of anesthetization with TBE followed by injection and bleeding produced no change in plasma LH in intact males, but a decline followed by a rebound to initial levels in castrates. FSH levels showed a delayed rise in the intact animals and a decline followed by return to initial values in the castrates. In both intact and castrate animals, prolactin levels declined acutely and remained low throughout the experiment. Subcutaneous administration of LRF produced a dose-related acute release of LH in intact and castrate males. The response was prolonged compared to that observed in previous studies following intravenous administration of the peptide. Minimal and delayed FSH release occurred following high doses of 100 or 500 ng of the peptide in intact animals, but dose-related increases of considerable magnitude took place in the castrates. In general, r...
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More From: Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.)
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