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      Luteinizing Hormone Response of Castrated Rabbits to Treatment with Testosterone Propionate and Estradiol Benzoate

      Neuroendocrinology

      S. Karger AG

      Castrated rabbits, LH, Testosterone, Estradiol

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          Abstract

          The effects of sex steroids on luteinizing hormone (LH) secretion in rabbits of both sexes castrated for at least 2 weeks previously were investigated. An intramuscular (i.m.) injection of testosterone propionate (TP) or estradiol benzoate (EB) was given about midway through blood sampling which ranged from 6 to 12 h. LH and steroids were measured by established radioimmunoassay (RIA) procedures. Variable responses were obtained with animals. Castration itself in most instances led to increases in circulating levels of LH which ranged from normal levels to greater than 200 ng/ml with some evidence for episodic variation. EB was more effective than TP in reducing LH levels and inhibiting episodic release.

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          Author and article information

          Journal
          NEN
          Neuroendocrinology
          10.1159/issn.0028-3835
          Neuroendocrinology
          S. Karger AG
          0028-3835
          1423-0194
          1978
          1978
          25 March 2008
          : 25
          : 1
          : 22-31
          Affiliations
          Department of Obstetrics and Gynecology, Program in Reproductive Biology, McMaster University, Health Sciences Center, Hamilton, Ontario
          Article
          122727 Neuroendocrinology 1978;25:22–31
          10.1159/000122727
          652117
          © 1978 S. Karger AG, Basel

          Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

          Page count
          Pages: 10
          Categories
          Original Paper

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