[The influence of doxorubicin incorporated in phospholipid drug delivery nanosystem on HEPG2 cells proteome].

A phospholipid drug delivery nanosystem with particle size up to 30 nm elaborated at the Institute of Biomedical Chemistry has been used earlier for incorporation of doxorubicin (Doxolip). This system demonstrated higher antitumor effect in vivo as compared with free doxorubicin. In this study the effect of this nanosystem containing doxorubicin on HepG2 cell proteome has been investigated.

[Carbohydrate metabolism enzymes in children with extrahepatic portal hypertension].

Glycogen and protein concentrations and the activities of liver glycogen metabolic enzymes were measured in 22 children aged 4 to 15, suffering from extrahepatic portal hypertension. Glucose-6-phosphatase, amylo-1,6-glucosidase, fructose-1,6-diphosphatase, phosphorylases alpha and beta, phosphoglucomutase, and phosphohexose isomerase levels were analyzed. Liver biopsy specimens obtained by surgical marginal biopsy were used in the study.

[The determination of amylo-1,6-glucosidase in biopsy specimens from human chorion].

This method has been developed for the prenatal diagnosis of a grave hereditary disease, a deficiency of amylo-1,6-glucosidase (A-1,6-G) activity. The methods suggested earlier did not rule out the effects of other glucosidases, that could result in false-positive data if the fetus was involved. The new method for measuring A-1,6-G activity includes sedimentation of acid alpha-glucosidase with rabbit blood antiserum to human placental acid alpha-glucosidase.

[Soluble and membrane-bound forms of neutral alpha-glucosidase in human urine in normal conditions and in kidney diseases].

Soluble and membrane-bound forms of neutral alpha-glucosidase, which are immunologically similar to the corresponding forms of kidney enzymes, were found in urine of healthy persons and of patients with kidney impairments. Membrane-bound enzyme was only slightly active in urine of healthy persons and constituted 3-10% of total urine activity although the ratio of membrane-bound enzyme was simultaneously elevated under pathological conditions. The increased rate of soluble enzyme secretion was responsible for distinct activation of neutral alpha-glucosidase in urine of the patients with kidney impairments.

[The use of antibodies for differential determination of neutral and acid alpha-glucosidases in human urine in normal and pathological states].

Use of antibodies towards neutral alpha-glucosidase from human kidney brush border enabled to estimate distinctly the activity of acid alpha-glucosidase in urine of healthy persons and patients although the activity of neutral enzyme in urine exceeded markedly the acid enzyme activity. Simultaneous use of antibodies to both these enzymes permitted to estimate separately the activity of acid and neutral alpha-glucosidases in a mixture. Accuracy of these estimations was confirmed after consecutive use of these antibodies.