Levels of 17 alpha,20 alpha-dihydroxy-4-pregnen-3-one, 3 beta,17 alpha,20 alpha-trihydroxy-5 beta-pregnane, and other sex steroids, in blood plasma of male dab, Limanda limanda (marine flatfish) injected with human chorionic gonadotrophin. | - CCMAR -

Journal Article

TítuloLevels of 17 alpha,20 alpha-dihydroxy-4-pregnen-3-one, 3 beta,17 alpha,20 alpha-trihydroxy-5 beta-pregnane, and other sex steroids, in blood plasma of male dab, Limanda limanda (marine flatfish) injected with human chorionic gonadotrophin.
Publication TypeJournal Article
AuthorsCanario, AVM, Scott, AP
Year of Publication1991
JournalGen Comp Endocrinol
Volume83
Questão2
Date Published1991 Aug
Pagination258-64
ISSN0016-6480
Palavras-chaveAnimals, Chorionic Gonadotropin, Flatfishes, Hydroxyprogesterones, Kinetics, Male, Pregnanetriol, Reference Values, Testis, Time Factors
Abstract

In a previous study, plasma sex steroid levels were measured in female dab (Limanda limanda) induced to ovulate by injections of human chorionic gonadotrophin (HCG). In the present study, a similar experiment was carried out on male dabs. In common with female dabs, 17 alpha,20 alpha-dihydroxy-4-pregnen-3-one and 3 beta,17 alpha,20 alpha-trihydroxy-5 beta-pregnane showed the greatest response. Their plasma levels increased, respectively, from 6 +/- 1.6 and 13 +/- 6.2 ng/ml to ca. 62 ng/ml within 36 hr and then decreased. Levels of both steroids remained low in fish injected with saline. There was no statistically significant effect of HCG on plasma testosterone or 11-ketotestosterone concentrations. Initial levels of both hormones were between 10 and 20 ng/ml, and decreased simultaneously in both HCG- and saline-injected fish. Levels of 17 alpha-hydroxy-4-pregnen-3,20-dione, 17 alpha,20 beta-dihydroxy-4-pregnen-3-one, 11-deoxycortisol, and 17 alpha,20 beta, 21-trihydroxy-4-pregnen-3-one were mostly below the detection limits of the assays (0.4 ng/ml). There was no statistically significant effect of HCG on either the total volume of milt collected or the proportion occupied by spermatozoa.

Sapientia

http://www.ncbi.nlm.nih.gov/pubmed/1916213?dopt=Abstract

Alternate JournalGen. Comp. Endocrinol.
PubMed ID1916213
CCMAR Authors