A new human monoclonal cold agglutinin Sa recognizing terminal N-
acetylneuraminyl groups on the cell surface
D Roelcke, W Pruzanski, W Ebert, W Romer, E Fischer, V Lenhard and E Rauterberg
A human homogeneous IgM/K cold agglutinin (CA) Sa is described, whose
corresponding antigen on erythrocytes (RBC) was abolished by neuraminidase.
This indicated that the antigen was related to N- acetylneuraminic acid,
similar to Pr and Gd antigens. In contrast, this antigen was only partially
destroyed by proteases, whereas Pr antigens are completely destroyed and Gd
antigens are not influenced by proteases. Sa antibody activity was
inhibited by sialyllactose NeuAc (alpha 2 leads to 3) (alpha 2 leads to 6)
Gal (beta, 1 leads to 4) Glc like anti-Gd but in contrast to anti-Pr. The
corresponding antigen was associated with an RBC membrane glycoprotein
fraction like Pr, Sa is one of a spectrum of human monoclonal CA against
cell surface neuraminyl groups.
Volume 55,
Issue 4,
pp. 677-681,
04/01/1980
Copyright © 1980 by The American Society of Hematology