Prepubertal administration of estradiol valerate disrupts cyclicity and leads to cystic ovarian morphology during adult life in the rat: role of sympathetic innervation.
Administration of estradiol valerate (EV) to adult rats leads to anovulation and cystic ovarian morphology. Sympathetic ovarian nerve denervation (SONX) overcomes this disruption. In this study, we determined whether EV administration to juvenile rats prevents achievement of reproductive competence, disrupts cyclicity, and whether this programming is facilitated via activation of the sympathetic nerve input to the ovary. Prepubertal rats were administered 2 mg EV in corn oil or corn oil alone. One half of the animals from each group underwent SONX on d 71 of life. Rats were euthanized on d 91 for determination of serum gonadotropins, progesterone, Delta4 androstenedione, and estradiol concentrations, ovarian norepinephrine (NE), and 3beta-hydroxysteroid dehydrogenase (3beta-HSD) activities and ovarian dynamics. Results revealed that EV administration during juvenile period advanced pubertal onset, suppressed circulating LH, FSH, and Delta4 androstenedione, increased ovarian NE, estradiol, and 3beta-HSD activities, disrupted ovarian dynamics evidenced as absent corpus luteum and presence of ovarian cysts and culminated in anovulation. SONX restored cyclicity in these animals, normalized LH, estradiol, ovarian 3beta-HSD activities, and ovarian dynamics as evidenced by the disappearance of ovarian cysts and appearance of corpus luteum and restored corpus luteum function. These findings provide evidence that EV exposure during juvenile life leads to long-lasting deleterious reproductive consequences via activation of the sympathetic ovarian nerve.
Rosa-E-Silva
Alzira
A
Department of Physiology, Universidad de Sao Paulo, Brazil.
Guimaraes
Marco Aurelio
MA
Padmanabhan
Vasantha
V
Lara
Hernán E
HE
D000375:Aging / Q000502:physiology; D000818:Animals; D003714:Denervation; D004334:Drug Administration Schedule; D004958:Estradiol / Q000008:administration & dosage* / Q000031:analogs & derivatives*; D004966:Estrogens, Conjugated (USP) / Q000008:administration & dosage*; D004971:Estrus / Q000187:drug effects* / Q000502:physiology; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D007986:Luteinizing Hormone / Q000097:blood; D009638:Norepinephrine / Q000378:metabolism; D009994:Osmolar Concentration; D010048:Ovarian Cysts / Q000139:chemically induced*; D010053:Ovary / Q000294:innervation* / Q000378:metabolism / Q000473:pathology / Q000503:physiopathology; D051381:Rats; D017208:Rats, Wistar; D013564:Sympathetic Nervous System / Q000502:physiology*
D004966:Estrogens, Conjugated (USP); D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D009638:Norepinephrine