The lipids content in blood and liver of dairy cows during the transitional period
2011
Đoković, R., Faculty of Agronomy, Čačak (Serbia) | Kurćubić, V., Faculty of Agronomy, Čačak (Serbia) | Šamanc, H., Faculty of Veterinary Medicine, Belgrade (Serbia) | Ilić, Z., Faculty of Agriculture, Zubin Potok (Serbia) | Stojković, J., Faculty of Agriculture, Zubin Potok (Serbia)
The objective of the present investigation was to determine the correlation in the blood concentrations of lipids and content in the liver in dairy cows (n=40) in transitional period. The cows were divided into four groups: the first group included late pregnant cows (n=10) from the 10 th to 4 th day before calving, the second group included late pregnant cows (n=10) from the 4th to 1st day before calving, the third group included puerperal healthy cows (n=10) whereas the fourth group included puerperal ketotic cows (n=10). Samples of liver and blood tissues were taken from all cows. Pathohistological examination of liver samples showed statistically significant higher lipid infiltration (P is less than 0.01) in ketotic cows compared to healthy cows. Biochemical examination of blood serum showed significantly higher values (P is less than 0.01) of free fatty acids in ketotic cows such as significantly lower concentrations of glucose (P is less than 0.01), triacylglycerols (P is less than 0.01) and total cholesterol (P is less than 0.05) compared to the groups of healthy cows. Significant increase of the concentrations of free fatty acids, such as positive correlation ( r=0.51, P is less than 0.05) between the free fatty acids in the blood and the content of lipids in liver in ketotic cows compared to healthy ones, suggests that during intensive lipomobilization newly synthetized triacylglycerols accumulated in the hepatocytes.
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