[State of the reserve pathway of adenine nucleotide synthesis in the erythrocytes of white rats with vitamin A deficiency].

In spite of the fact that vitamin A exerts an obvious effect on cell membrane permeability, the specific mechanisms of vitamin A participation in stabilizing the cell membrane remain unclear. Therefore studies on the effect vitamin A produces on the main and reserve pathways of the synthesis of adenylnucleotides are of great importance. The experiments on Wistar rats showed that under vitamin A deficiency the content of ATP and ADP in red cells dramatically changed as compared to that in control animals.

[Content of lipids and their fractions in erythrocyte membranes of rats with Guerin's carcinoma, A-avitaminosis and the effect of vitamin A in significant doses].

The content of lipids in rat erythrocyte membranes was studied with vitamin A deficiency, Guerin's carcinoma and with administration of significant doses of vitamin A. It is found that vitamin A deficiency decreases the content of phospholipid fractions: phosphatidyl ethanolamine, sphingomyelin, phosphatidyl serine. The content of phosphatidyl choline is unchanged.