Biol Reprod Lalor Postdoctoral Fellowships -- Application Deadline January 15, 2009
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Reimers, T. J.
Right arrow Articles by Concannon, P. W.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Reimers, T. J.
Right arrow Articles by Concannon, P. W.
Agricola
Right arrow Articles by Reimers, T. J.
Right arrow Articles by Concannon, P. W.

Biology of Reproduction, Vol 31, 148-154, Copyright © 1984 by Society for the Study of Reproduction

ARTICLES

Effects of reproductive state on concentrations of thyroxine, 3,5,3'- triiodothyronine and cortisol in serum of dogs

TJ Reimers, LK Mummery, JP McCann, RG Cowan and PW Concannon

Reproductive state of animals frequently is overlooked when examining endocrine functions of the thyroid gland and adrenal cortex. This experiment was done to determine effects of reproductive state on basal and stimulated concentrations of thyroxine (total T4), 3,5,3'- triiodothyronine (total T3) and cortisol in serum of adult Beagle dogs. Five male, 5 anestrous, 5 proestrous, 5 diestrous, 5 pregnant and 5 lactating dogs were fasted for 18 h before each dog received 5 IU of thyrotropic hormone (TSH) i.v. and 2.2 IU/kg of body weight of adrenocorticotropic hormone (ACTH) i.m. Blood samples were collected via jugular cannulas or by jugular venipuncture at 60, 45, 30, 15 and 1 min before and 0.5, 1, 2, 3, 4, 5, 8, 12 and 24 h after injection. Concentrations of T4 were similar in serum from diestrous and pregnant bitches but were greater (P less than 0.025) than those in dogs of other reproductive states before and after treatment with TSH. Concentrations of T3 were greater (P less than 0.005) in serum from diestrous bitches before and after TSH injection than in serum from dogs of all other reproductive states. Concentrations of T3 in males, anestrus, proestrus, pregnancy and lactation did not differ. Basal concentrations of cortisol did not differ consistently among reproductive states. However, concentrations post-ACTH were different (P less than 0.05) with anestrus = diestrus greater than lactation = pregnancy = male greater than proestrus. These results indicate that reproductive state of experimental animals must be considered when studying thyroidal and adrenal functions.


This article has been cited by other articles:


Home page
 Vet Rec.Home page
R. E. Shiel, S. F. Brennan, A. J. Omodo-Eluk, and C. T. Mooney
Thyroid hormone concentrations in young, healthy, pretraining greyhounds
Vet Rec., November 3, 2007; 161(18): 616 - 619.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Regul. Integr. Comp. Physiol.Home page
K. M. Canniff, M. S. Smith, D. B. Lacy, P. E. Williams, and M. C. Moore
Glucagon secretion and autonomic signaling during hypoglycemia in late pregnancy
Am J Physiol Regulatory Integrative Comp Physiol, September 1, 2006; 291(3): R788 - R795.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1984 by the Society for the Study of Reproduction.