| Serum pattern of thyroxine (T4), 3,3',5-triiodothyronine (T3) and 3,3',5'-triiodothyronine (rT3) in fed and fasted cocks following TRH stimulation. | |
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MedLine Citation:
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PMID: 1950229 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Food deprivation for 27 and 75h in cocks decreased serum levels of T3 maximally by 61.1% and increased the level of rT3 by 51.4% and that of T4 by 22.4%. Injection of a single dose of TRH (10 micrograms/kg b.w.) increased serum levels of all 3 iodothyronines in both fed and food-deprived animals. In fasted, TRH-treated birds the peak of serum rT3 was 80.5 and 73.3% above control levels in 27- and 75-hr food-deprived cocks, respectively (fed birds: 14.6 and 9.7%); the relevant data for T3 were: 78.3 and 40.4% (fed birds: 95.7 and 127.5%); for T4: 30.0 and 27.0% (fed birds: 9.2 and 6.1%). The greater relative increment of serum rT3 than T3 in food-deprived and TRH-treated cocks was supported by a fall of the serum T3/rT3 ratio to 78.7 and 27.9% in fed cocks and 27- and 75-hr fasted animals, respectively. We conclude, that food deprivation modifies the response of the hypophysis-thyroid axis to exogenous TRH in the sense that during fasting the production of rT3 is enhanced relative to T3. |
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Authors:
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K I Abdel-Fattah; S Bobek; A Sechman |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Zentralblatt für Veterinärmedizin. Reihe A Volume: 38 ISSN: 0514-7158 ISO Abbreviation: Zentralbl Veterinarmed A Publication Date: 1991 Jul |
Date Detail:
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Created Date: 1991-12-23 Completed Date: 1991-12-23 Revised Date: 2005-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0331323 Medline TA: Zentralbl Veterinarmed A Country: GERMANY |
Other Details:
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Languages: eng Pagination: 401-8 Citation Subset: IM |
Affiliation:
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Department of Animal Physiology, Academy of Agriculture, Kraków, Poland. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Chickens / blood* Eating / physiology Food Deprivation / physiology* Male Thyroid Gland / physiology Thyrotropin-Releasing Hormone / pharmacology Thyroxine / blood* Triiodothyronine / blood* Triiodothyronine, Reverse / blood* |
| Chemical | |
Reg. No./Substance:
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24305-27-9/Thyrotropin-Releasing Hormone; 5817-39-0/Triiodothyronine, Reverse; 6893-02-3/Triiodothyronine; 7488-70-2/Thyroxine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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