STUDIES ON THE A, B, O(H) BLOOD GROUPS ON HUMAN CELLS IN CULTURE.

Abstract HeLa cells were used in the mixed agglutination reaction to determine optimal conditions for demonstrating blood group H activity by this method. The following parameters were studied in the mixed agglutination reaction: (1) derivation of cell line, (2) cell viability, (3) effects of antibody titer, (4) source and type of antibody. Studies with primary human amnion cells indicated that over a 30-day period of cultivation in vitro there were losses in specific ABO blood group activity. Addition of blood group precursors to establish human amnion cell lines FL-J and F-D indicated that blood group B antigen could be synthesized and maintained in vitro.