4-Nitro-3-phenylphenol has both androgenic and anti-androgenic-like effects in rats.
To investigate the effect of endocrine disruption of 4-nitro-3-phenylphenol (PNMPP) on immature male Wistar-Imamichi rats, the rat pituitary was exposed to PNMPP (10(-5)-10(-9) M) for 24 h with or without gonadotropin-releasing hormone (GnRH) in experiment I. In addition, the Leydig cells (10(-5)-10(-9) M) were exposed to PNMPP for 24 h with or without human chronic gonadotropin (hCG) in experiment II. Our results showed that the PNMPP at 10(-5)-10(-7) M suppressed follicle-stimulating hormone (FSH) and luteinizing hormone (LH) productions from GnRH-stimulated pituitary cells. At the same time, PNMPP 10(-5)-10(-7) M induced an increase in testosterone production from the Leydig cells treated with or without hCG. Based on our results, it can be concluded that that PNMPP might have both androgen agonist action by decreasing FSH and LH production in the pituitary and anti-androgenic action by increasing testosterone production in the Leydig cell.
Department of Physiology, Faculty of Medicine, Srinakharinwirot University, Bangkok 10110, Thailand; Labortory of Veterinary Physiology, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology 183-8509, Japan.
Jiratthiya
J
Trisomboon
ChunMei
C
Li
Akira
A
Suzuki
Gen
G
Watanabe
Kazuyoshi
K
Taya
D000726:Androgen Antagonists / Q000494:pharmacology*; D000728:Androgens / Q000494:pharmacology*; D000818:Animals; D001713:Biphenyl Compounds / Q000494:pharmacology*; D006063:Chorionic Gonadotropin / Q000494:pharmacology; D052244:Endocrine Disruptors / Q000494:pharmacology*; D005640:Follicle Stimulating Hormone / Q000378:metabolism; D007985:Leydig Cells / Q000187:drug effects* / Q000378:metabolism; D007986:Luteinizing Hormone / Q000378:metabolism; D008297:Male; D009596:Nitrophenols / Q000494:pharmacology*; D010902:Pituitary Gland / Q000187:drug effects* / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D013739:Testosterone / Q000378:metabolism
C494060:4-nitro-3-phenylphenol; D000726:Androgen Antagonists; D000728:Androgens; D001713:Biphenyl Compounds; D006063:Chorionic Gonadotropin; D052244:Endocrine Disruptors; D009596:Nitrophenols; D013739:Testosterone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone