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PARALLEL CHANGES IN THE PLASMA CONCENTRATION OF FOLLICLE-STIMULATING HORMONE AND PITUITARY 5α-DIHYDROTESTOSTERONE FORMATION AFTER CRYPTORCHIDECTOMY IN THE RAT

PARALLEL CHANGES IN THE PLASMA CONCENTRATION OF FOLLICLE-STIMULATING HORMONE AND PITUITARY... Department of Pharmacology, Fakulteit Geneeskunde, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium(Received 23 January 1978)It has been shown that fluctuations in the secretion of follicle-stimulating hormone (FSH), which occur under a variety of physiological and experimental conditions in vivo and are not dependent on the secretion of luteinizing hormone (LH), are closely paralleled by fluctuations in the rate of conversion of testosterone to 5α-dihydrotestosterone (DHT) by intact pituitary tissue in vitro (Denef, Magnus & McEwen, 1973, 1974). This suggests that the rate of formation of DHT by the pituitary gland increases when certain independent regulatory mechanisms controlling the release of FSH are activated. Non-parallel changes in the plasma concentrations of FSH and LH in the rat have also been observed after bilateral cryptorchidectomy (Swerdloff, Walsh, Jacobs & Odell, 1971; Gupta, Rager, Zarzycki & Eichner, 1975; Hall & Gomes, 1975; Gomes & Jain, 1976; Ojeda, Jameson & McCann, 1976). Most http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Endocrinology Bioscientifica

PARALLEL CHANGES IN THE PLASMA CONCENTRATION OF FOLLICLE-STIMULATING HORMONE AND PITUITARY 5α-DIHYDROTESTOSTERONE FORMATION AFTER CRYPTORCHIDECTOMY IN THE RAT

DENEF, CARL; HAUTEKEETE, EMMY
Journal of Endocrinology , Volume 77 (2) – May 1, 1978
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Publisher
Bioscientifica
Copyright
Copyright © 1978 The Authors. All Rights Reserved.
ISSN
0022-0795
eISSN
1479-6805
DOI
10.1677/joe.0.0770279
Publisher site
See Article on Publisher Site

Abstract

Department of Pharmacology, Fakulteit Geneeskunde, Katholieke Universiteit Leuven, B-3000 Leuven, Belgium(Received 23 January 1978)It has been shown that fluctuations in the secretion of follicle-stimulating hormone (FSH), which occur under a variety of physiological and experimental conditions in vivo and are not dependent on the secretion of luteinizing hormone (LH), are closely paralleled by fluctuations in the rate of conversion of testosterone to 5α-dihydrotestosterone (DHT) by intact pituitary tissue in vitro (Denef, Magnus & McEwen, 1973, 1974). This suggests that the rate of formation of DHT by the pituitary gland increases when certain independent regulatory mechanisms controlling the release of FSH are activated. Non-parallel changes in the plasma concentrations of FSH and LH in the rat have also been observed after bilateral cryptorchidectomy (Swerdloff, Walsh, Jacobs & Odell, 1971; Gupta, Rager, Zarzycki & Eichner, 1975; Hall & Gomes, 1975; Gomes & Jain, 1976; Ojeda, Jameson & McCann, 1976). Most

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Journal of Endocrinology – Bioscientifica

Published: May 1, 1978

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