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Activities of gamma-glutamyltransferase, alkaline phosphatase and aspartate-aminotransferase in colostrum, milk and blood plasma of calves fed first colostrum at 0-2, 6-7, 12-13 and 24-25 h after birth.
- Source :
-
Journal of veterinary medicine. A, Physiology, pathology, clinical medicine [J Vet Med A Physiol Pathol Clin Med] 2001 Apr; Vol. 48 (3), pp. 179-85. - Publication Year :
- 2001
-
Abstract
- Enzyme activities of gamma-glutamyltransferase (gamma-GT), alkaline phosphatase (AP) and aspartate-aminotransferase (AST) were measured from birth to the age of 28 days in calves which were fed colostrum at 0-2, 6-7, 12-13, or 24-25 h after birth. Enzyme activities were also measured in colostrum (first to fifth milking) and in mature milk. Activities were highest in the first colostrum milking and decreased to the lowest activities in mature milk. Plasma gamma-GT activity transiently increased after first colostrum intake and was greater in calves fed first colostrum within less than 6-7 h than in those fed first colostrum later than 12 h after birth. Activity of gamma-GT reflected the absorption of colostral gamma-GT, which decreased with time after birth. The AP activity transiently increased after colostrum intake and was higher in calves fed colostrum within the first 12 h of life than in those fed later after birth. The transient rise of plasma AP activity also indicated absorption of colostral AP, although endogenous sources of AP could not be excluded. The activity of AST also transiently increased after colostrum intake but there was no association with time of first colostrum feeding, indicating that the rise of plasma AST activity was the consequence of enhanced endogenous production and was independent of colostrum intake. In conclusion, there are different causes leading to postnatal changes in enzyme activities.
- Subjects :
- Alkaline Phosphatase blood
Animals
Aspartate Aminotransferases blood
Female
Time Factors
gamma-Glutamyltransferase blood
Alkaline Phosphatase metabolism
Animals, Newborn metabolism
Aspartate Aminotransferases metabolism
Cattle metabolism
Colostrum enzymology
Milk enzymology
gamma-Glutamyltransferase metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 0931-184X
- Volume :
- 48
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Journal of veterinary medicine. A, Physiology, pathology, clinical medicine
- Publication Type :
- Academic Journal
- Accession number :
- 11379391
- Full Text :
- https://doi.org/10.1046/j.1439-0442.2001.00338.x