[Carbohydrate metabolism regulation in early embryogenesis].

The data obtained by the collaborators of the department concerning regulation of the activities of some enzymes of glycolysis, pentose phosphate shunt and gluconeogenesis in the unfertilized eggs and embryos of the loach are under discussion. It was determined that the incubation of eggs and embryos in glucose, lactate or fumarate solutions and in the media with added insulin causes significant changes in the activities of several enzymes, the character of these changes corresponding mainly to those in differentiated tissues. Nevertheless there were observed definite peculiarities in the reaction of the enzyme activities to the intake of utilized substances by the embryo's cells as well.