Study of the activity of lipolysis and gluconeognesis in new-child cows with subclinical and clinical ketosis

Abstract

The article discusses the results of a study of markers of lipolysis and gluconeogenesis in new-calf cows against the background of subclinical and clinical ketosis. The indicator of beta-hydroxybutyric acid in blood serum was chosen as a marker for the formation of groups based on the presence of ketosis and its form. Cows with an indicator of up to 1.0 mmol/l were considered healthy, the presence of subclinical ketosis was determined at a level of beta-hydroxybutyrate from 1.1 to 1.5 mmol/l, clinical ketosis - over 1.6 mmol/l. Cows were bled 3-7 days after calving and a study was made of the concentration of beta-hydroxybutyric acid, glucose, fructosamine, non-esterified fatty acids, cortisol and ALT activity. The results of the study revealed a significant increase in the concentration of non-esterified fatty acids in cows with moderate ketonemia by 46.9%, and in cows with a pronounced increase in the content of beta-hydrosibutyrate in the blood - by 79.8%. When considering the concentration of glucose in cows with different levels of beta-hydroxybutyrate in the blood, there is a slight increase in the indicator by 14.5% (P> 0.05) in cows with subclinical ketosis, but in animals with severe ketonemia, a significant decrease in glucose by 38.3 %. Cows in subclinical and clinical ketosis had significantly higher levels of cortisol (1.9 and 2.4 times, respectively) than cows with low blood levels of betahydroxybutyric acid. At the same time, cows with clinical ketosis showed a significant increase in the concentration of fructosamine by 22.3%. Subclinical ketosis, manifested by a moderate increase in the concentration of beta-hydroxybutyric acid in the blood (1.1 - 1.5 mmol / l), causes adaptive reactions in the body aimed at maintaining glucose homeostasis and extracting lipids from the depot that compensate for a temporary energy deficit. Clinical ketosis is accompanied by dissociation of the regulatory mechanisms of anabolic and catabolic processes in the body of a freshly calved cow.