[Serum levels of IgG, IgA, IgM, blood proteins and various lysosomal enzymes in donors after repeated plasmapheresis].

The levels of total protein, protein fractions by electrophoresis, the levels of IgG, IgA, IgM, the activity of aminotransferases, beta-N-acetyl-D-glucosaminidase, beta-galactosidase were determined in the serum of donors in a control group and in two groups with a history of less than 12 plasmaphereses and more than 12 such procedures. No changes were found in the serum level of total protein. In electrophoretic separation of serum proteins a statistically significant increase was noted of beta-globulin fraction in both studied groups in relation to the control group. IgG level was increased by 27% in both studied groups compared with controls. No statistically significant changes were found in the levels of lysosomal enzymes in all groups.