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Activities of Aspartate Aminotransferase, Alanine Aminotransferase, Gamma-Glutamyltransferase, Alkaline Phosphatase in Plasma of Postpartum Holstein Cows

Author(s): Ping Liu | BaoXiang He | XianLing Yang | XiaoLu Hou | HaiYang Zhao | YinHua Han | Pei Nie | HuiFang Deng | Long Cheng

Journal: Journal of Animal and Veterinary Advances
ISSN 1680-5593

Volume: 11;
Issue: 8;
Start page: 1270;
Date: 2012;
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Keywords: Aspartate aminotransferase | alanine aminotransferase | gamma-glutamyltransferase | alkaline phosphatase | cows | China

Depressed appetite and reduced Dry Matter Intake (DMI) and feeding energy-dense diets for a long time around parturition of cows may lead to excessive lipid mobilization which causes the liver damage. This study was meant to determine the effects of postpartun enzymes metabolic status in Holstein cows. In this study, blood samples were during the whole experimental period, obtained from the jugular venepuncture from each animal on 1 week prepartum (week 1), days delivery (week 0) and 1st 9 weeks postpartum (week 1-9). They were analyzed for examining Aspartate aminotransferase (AST), Alanine Aminotransferase (ALT), Gamma-Glutamyltransferase (GGT), Alkaline Phosphatase (ALP) activity. The resultes showed a higher activity of AST which was determined in the 1-3 weeks than other’s. ALT activity indicated a statistically significant increase from the 5-7 weeks of lactation and activity in the 7th week postpartum periods significally reached to the peak. GGT activity in the antepartum 1 week until delivery day was significally lower in comparison with the first to reach the 9th weeks postpartum. ALP activity in the delivery day and 6-8 weeks significant increased in process. Therefore, the AST, ALT, GGT and ALP of enzyme activity which could be used significantly change in the blood plasma of Holstein.
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