Finnish En(a-) propositus with anti-EnaFS and anti-EnaFR: in vitro and in vivo characteristics.
A third Finnish En(a-) individual (ERP) with alloanti-Ena has been identified. Subsequent family studies revealed that ERP is distantly related to the 2 previous Finnish En(a-) propositi. Serologically, ERP's erythrocytes were found to be M-N-'N'+S-s+U+En(a-)Wr(a-b-) and were sialic acid deficient. SDS-PAGE studies confirmed that the red cell membranes lacked the MN-sialoglycoprotein, glycophorin-A. ERP's serum contained an IgG antibody which demonstrated two separable specificities, a ficin-sensitive specificity (anti-EnFS) and a ficin-resistant specificity (anti-EnFR), which reacted by the indirect antiglobulin technique. The antibodies were probably pregnancy induced, as ERP had never been transfused. A 51Cr-labelled red cell survival study showed that the antibodies were capable of causing significant destruction of incompatible red cells.
D000918:Antibody Specificity; D001789:Blood Group Antigens / Q000235:genetics / Q000276:immunology*; D005260:Female; D005387:Finland; D006801:Humans; D066298:In Vitro Techniques; D007518:Isoantibodies / Q000276:immunology*; D008297:Male; D010375:Pedigree
D001789:Blood Group Antigens; D007518:Isoantibodies