title: [Effects of a new analogue of LH-RH, D-Ser(TBU)6- EA10-LH-RH, on gonadotropin liberation in males (author's transl)].
abstract: Effects on the secretion of gonadotropins by D-Ser (TBU)6-EA10-LH-RH were investigated in 7 male volunteers without known endocrine disturbances. One week after subcutaneous injection of 100 mug of LH-RH the probands were given 5 mug of the LH-RH analogue subcutaneously into the abdominal wall. LH, FSH and testosterone concentrations were estimated in the serum and compared with each other at varying intervals after each injection. LH-RH caused a marked increase of the LH content in serum after 20 minutes with a maximum after 40 minutes. The effect of the analogue occurred with a delay. After 40 minutes an LH level was reached which still persisted 6 hours later. Contrary to LH there were considerable individual differences in serum FSH levels. In the initial phase after injection of LH-RH and LH-RH analogue that increase of the FSH level in serum was almost parallel. However, the analogue showed a marked depot effect. Serum concentrations of testosterone showed no significant changes after administration of the releasing hormones. D-Ser(TBU)6-EA10-LH-RH is approximately 20 times effective as LH-RH. A dose of 5 mug is effective for 6-8 hours.
mesh_terms: D000009:Abdominal Muscles; D000328:Adult; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives / Q000494:pharmacology*; D006062:Gonadotropins / Q000378:metabolism*; D006801:Humans; D007279:Injections, Subcutaneous; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D013739:Testosterone / Q000097:blood; D013997:Time Factors
chemical_list: D006062:Gonadotropins; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone
vernacular_title: Die Wirkung eines neuen Analogs des LH-RH, D-Ser(TBU)6-EA10-LH-RH, auf die Gonadotropin-Freisetzung bei Männern