| Diurnal and individual variations in bile acids in the plasma of normal dairy cows. | |
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MedLine Citation:
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PMID: 2596389 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Blood samples were collected every 2 h during a 24 h period from 6 cows of one herd and 10 cows of another herd. In a third herd 9 cows were sampled every 2 h from 6 a.m. to 8 p.m. Concentrations of total bile acids, acetoacetate, glucose and free fatty acids were determined in blood plasma. A marked difference in individual bile acid concentrations and patterns of diurnal variation was found. For most cows the highest bile acid values were observed between 2 and 6 a.m. (overall mean (+/- SD) at 6 a.m.: 104 +/- 84 mumol/l, range: 20-307 mumol/l). Fourteen cows with a bile acid value greater than 90 mumol/l at 6 a.m. ("high BA") were characterized as a group by showing a pronounced decrease in the mean bile acid concentration after morning feeding. In the group of 11 cows with a 6 a.m. bile acid value less than 90 mumol/l ("low BA") the time of day did not contribute significantly to the bile acid variation. For the "high BA" group a nearly synchronous variation between the mean values of the 3 feeding dependent parameters (acetoacetate, glucose and free fatty acids) and the mean values of bile acids was found. The within animal coefficients of correlation between bile acids and the feeding dependent parameters were significantly higher in the "high BA" group than in the "low BA" group. No direct connection was found between bile acid levels and the quantity of concentrates fed or the individual milk yield. |
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Authors:
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S V Abdelkader; E Ropstad |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Acta veterinaria Scandinavica Volume: 30 ISSN: 0044-605X ISO Abbreviation: Acta Vet. Scand. Publication Date: 1989 |
Date Detail:
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Created Date: 1990-01-23 Completed Date: 1990-01-23 Revised Date: 2003-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0370400 Medline TA: Acta Vet Scand Country: DENMARK |
Other Details:
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Languages: eng Pagination: 221-8 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetoacetates
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blood Animals Bile Acids and Salts / blood* Blood Glucose / analysis Cattle / blood* Circadian Rhythm* Fatty Acids, Nonesterified / blood Female Lactation Pregnancy |
| Chemical | |
Reg. No./Substance:
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0/Acetoacetates; 0/Bile Acids and Salts; 0/Blood Glucose; 0/Fatty Acids, Nonesterified |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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