| Relationship between the thyroidal and gonadal axes during the estrous cycle of ewes of different breeds and ages. | |
| | |
MedLine Citation:
|
PMID: 2590387 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In order to define the patterns of TSH, T4, T3, rT3, GH and cortisol during the estrous cycle of sheep, pluriparous and primiparous ewes were synchronized with progestagen-impregnated pessaries (Veramix) at the start of the normal breeding season. After the pessaries were removed (day 0), daily blood sampling was carried out in cannulated ewes during the ovulatory cycle. Hormonal analyses of TSH, T4, T3, rT3, GH, cortisol, LH and progesterone (P) were performed by RIA. P and LH levels during the cycle were conform to the literature and were not different between the primiparous and pluriparous ewes of different breeds used in this study. Neither age nor breed influenced the hormone patterns. A significant negative correlation was found between TSH and P during the cycle, although the correlation between P and T4 was not significant; during the estrous period, low P levels were paralleled by high T4 levels, whereas the reverse was observed during the luteal phase. Higher T3 levels and T3/T4 ratios were observed during the luteal phase. No obvious pattern of rT3 and cortisol during the cycle was found. The GH concentration increased during the 17 days of the cycle. A positive correlation with P was calculated. During the estrous cycle obvious changes in thyroid hormones, GH and TSH occurred. However, this study shows no causal relationship between the thyroid and the gonadal axes. |
| | |
Authors:
|
R Peeters; N Buys; I Pauwels; E R Kühn; E Decuypere; O Siau; J Van Isterdael |
Related Documents
:
|
10791127 - Evaluation of the liaison thyroid chemiluminescence immunoassays. 7350607 - Thyroid function following neck irradiation for malignant lymphoma. 8936697 - Increase in rt3 serum levels observed during extended alaskan field operations of naval... 3167697 - Role of hyperthyroidism in increased thermogenesis in the cold-acclimated syrian hamster. 8023397 - Resolution of refractory, classic thrombotic thrombocytopenic purpura after staphylococ... 8568337 - Evidence for early oxidative stress in acute pancreatitis. clues for correction. |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
|
Title: Reproduction, nutrition, development Volume: 29 ISSN: 0926-5287 ISO Abbreviation: Reprod. Nutr. Dev. Publication Date: 1989 |
Date Detail:
|
Created Date: 1990-01-25 Completed Date: 1990-01-25 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 8913069 Medline TA: Reprod Nutr Dev Country: FRANCE |
Other Details:
|
Languages: eng Pagination: 237-45 Citation Subset: IM |
Affiliation:
|
Laboratory of Comparative Endocrinology, Zoological Institute, Leuven, Belgium. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Estrus / blood* Female Growth Hormone / blood Hydrocortisone / blood Luteinizing Hormone / blood Pituitary Hormones, Anterior / blood* Progesterone / blood Sheep Thyroid Hormones / blood* Thyrotropin / blood Thyroxine / blood Triiodothyronine / blood Triiodothyronine, Reverse / blood |
| Chemical | |
Reg. No./Substance:
|
0/Pituitary Hormones, Anterior; 0/Thyroid Hormones; 50-23-7/Hydrocortisone; 57-83-0/Progesterone; 5817-39-0/Triiodothyronine, Reverse; 6893-02-3/Triiodothyronine; 7488-70-2/Thyroxine; 9002-67-9/Luteinizing Hormone; 9002-71-5/Thyrotropin; 9002-72-6/Growth Hormone |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Both alpha- and beta-calcitonin gene-related peptides are present in plasma, cerebrospinal fluid and...
Next Document: In vitro study of the effect of different ionophore antibiotics and of certain derivatives on rumen ...