[Correlation between the presence of cytotoxic anti-HL-A antibodies in the clinical course of hemolytic disease of the newborn infant due to anti-Rh (D) or immune anti-A/B erythrocyte antibodies].

In a retrospective study the simultaneous influence of catotoxic HL-A antibodies on the clinical course of 60 cases of infants affected by Haemolytic disease on the Newborn due to anti Rh (D) or immune anti A/B antibodies, is shown. In all cases the treatment was by exange transfusion. In the group of infants in whose cord blood anti HL-A antibodies were found Exange transfusion had a weak efect so that it had to be repeated in 96 per cent of cases. In the group of infants in whose cord blood anti HL-S antibodies were not found, Exange transfusion was repeated only in one case, that is 2,7 per cent. In a group of Rh isommunised mothers whose children were affected by Haemolytic disease of the Newborn, antt HL-A antibodies were found in 61,7 per cent while 80,5 per cnet of the antibodies passed through the placente. In a group of ABO isoimmunised mothers cytotoxic HL-A antibodies were found in 42,3 per cent, while 45,4 per cent passed through the placente. A significant difference in the number of leucocytes, limphocytes, platelets, term of birth, level of bilirubin, amount of haemoglobin and Apgar Score was not found between the group of newborn who in their cord blood had, besides the already present isoimmunhaemagllutinines, cytotoxic HL-A antibodies and the group of infants with no cytotoxic anti HL-A antibodies, present. Cytotoxic HL-A antibodies in a way, react with the "unmasked" erythrocyte membrane, increasing haemolysis, so that the therapeutic effect of Exange transfusion was discriminated.