抄録
1) Gastric cancer antigen was detected with rabbit anti-gastric cancer serum which was absorbed with pooled normal human plasma and pooled normal gastric mucosal extracts. The precipitation reaction was inhibited by D-galactosamine and cancer patient's sera. The gastric cancer antigenic substance was a glycoprotein and appeared on immunoelectrophoresis as a single line in the y-region. The gastric cancer antigen was not detected in normal gastric mucosal extracts and other normal organ extracts.
2) Gastric mucosal antigens were detected with rabbit anti-normal gastric mucosa serum which was absorbed with pooled normal human plasma and duodenum, jejunum, ileum and colon extracts. The precipitation reaction was inhibited by D-galactosamine. One of gastric mucosal antigenic substances was a glycoprotein and appeared on immunoelectrophoresis as a single line in the α2-region. It was detected in gastric cancer extracts.
