Effect of Luteinizing Hormone (LH) and LH-Releasing Hormone (LHRH) on Testosterone Production In Vivo, in Fetal Rabbit Testis in Late Gestation

Autor: M. Berger, Georges Veyssiere, C. Jean-Faucher, M. De Turckheim, C. Jean
Rok vydání: 1977
Předmět:
Zdroj: Neonatology. 32:327-330
ISSN: 1661-7819
1661-7800
DOI: 10.1159/000241036
Popis: Plasma and testicular testosterone were measured by radioimmunoassay in the 29-day-old rabbit fetus receiving an injection of saline solution, LH or LHRH. 30 min following the injection of 5 μg LH into the umbilical vein, testosterone levels were significantly increased by 287% in the plasma and 293% in the testis, compared with controls receiving saline solution. The injection of 2 μg of LHRH under the same conditions significantly increased testicular testosterone by 256% and plasma testosterone by 746%. The results show that the fetal rabbit testis, at the end of gestation, is capable of responding to LH stimulation. The hypophyso-testicular axis is apparently functional at this stage of gestation, as shown by the response to LHRH.
Databáze: OpenAIRE