title: Increases in plasma concentration of progesterone by protease-sensitive urinary pheromones in female rats.
abstract: Plasma progesterone concentrations in female Wistar rats after exposure to urine preparations with and without protease-treatment were measured to explore the effects of protease-sensitive pheromones on the endocrine state. Exposure to crude urine excreted from male rats induced an increase in the plasma progesterone concentration in female rats. The progesterone concentration of oestrous females increased with an increase in the protein concentration in urine samples. Exposure of females in the oestrous state to urine preparations treated with protease did not induce increases in plasma progesterone. These results suggest that the presence of a protease-sensitive component in male urine exerts an influence on the endocrine state of oestrous females.
authors.affiliation: Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Tomioka
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Murayama
authors.forename: Makoto
authors.initials: M
authors.lastname: Kashiwayanagi
mesh_terms: D000818:Animals; D030762:Estrous Cycle / Q000502:physiology; D005260:Female; D010447:Peptide Hydrolases / Q000737:chemistry*; D010675:Pheromones / Q000737:chemistry / Q000494:pharmacology* / Q000652:urine; D011374:Progesterone / Q000097:blood*; D011402:Pronase / Q000737:chemistry; D051381:Rats; D017208:Rats, Wistar; D019147:Vomeronasal Organ / Q000187:drug effects
chemical_list: D010675:Pheromones; D011374:Progesterone; D010447:Peptide Hydrolases; D011402:Pronase