Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 1
Written by Vladimir ZDOROVININ, Natalia PUGACHEVA, Julia KULIKOVA, Tatiana DOROFEEVA
The article shows the dynamics of total proteins and the features of protein metabolism at the fetal stage of calf development. This is important for diagnosing intestinal diseases in newborn calves due to their rather high mortality from such diseases. It was revealed that at the early fetal stage of development, a villous-cryptal gradient of the distribution of total proteins in the cytoplasm of epithelial cells is formed. With the growth of the fetus, at the midfetal stage of development, an increase in the content of total proteins is observed in the epithelial cells of the villi. In a differentiated study, it was found that the decrease in the color of total proteins in 4-5-month-old fetuses is due to the action of acidic proteins. The intensity of the reaction to the main proteins does not decrease, but even increases. In fetuses of 6 months, acidic proteins are again accumulated in epithelial cells, by birth, the ratio of acidic and basic proteins levels off. The epithelium of the large intestine at the neonatal stage undergoes adaptive histochemical restructuring.
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