Cold auto-agglutinins

Autoimmune haemolytic anaemia with monoclonal IgM (kappa) anti-P cold autohaemolysins

A patient is described with immunoblastic non-Hodgkin's lymphoma and autoimmune haemolytic anaemia of the cold autoantibody type. The autoantibodies were monoclonal IgM-kappa cold haemagglutinins/haemolysins with blood-group specificity, anti-P. Red-cell autoantibodies directed against blood-group-P antigen have until now only been detected, as polyclonal IgG antibodies, in paroxysmal nocturnal haemoglobinuria.

Cold agglutinins accompanying Mycoplasma pneumoniae infection

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Cold agglutinin disease. Report of a case

Cold agglutinin disease is an autoimmune hemolytic anemia with varying causes. Two major types are recognized, with different clinical manifestations. Cold agglutinins are circulating antibodies capable of erythrocyte agglutination. However, the reaction is readily reversible. Treatment of the disease is variable. A case is presented to illustrate that minor oral surgical procedures are feasible, provided the proper precautions are taken.

Lymphoproliferative disease with IgM lambda monoclonal protein and autoimmune hemolytic anemia. A report of four cases and a review of the literature

Four patients with lymphoproliferative disease with immunoglobulin M lambda (IgMlambda) monoclonal proteins and severe autoimmune hemolytic anemia are described. These patients had many features in common that may warrant their recognition as a specific entity within the lymphoproliferative spectrum. In each case, a wide thermal range low titer cold agglutinin was present. The association of cold autoimmune hemolytic anemia with IgMlambda monoclonal protein and lymphoproliferative disease is unusual. The literature on IgM monoclonal proteins associated with lymphoproliferative disease is reviewed with emphasis on the presence of direct antiglobulin test positive autoimmune hemolytic anemia.

Radioactive antigen suicide of an anti-DNP (2,4-dinitrophenyl) clone. II. Follow-up of clones relatively resistant to radioactive antigen suicide when initially selected

After suicide of the anti-dinitrophenyl (DNP) clone E21 in a previous experiment (Eur. J. Immunol. 1975. 5:58) several new clones (S clones) appeared promptly in the recipients. There was compelling evidence that they were then resistant to suicide, relative to E21. We now report further studies on these S clones and their antibodies. The antibodies of half of the S clones had affinities ten to one hundred times higher than E21 (3 x 10(-7) M); none was lower. The four tested were also able to bind DNP on the particular conjugate used for the suicide procedure. Three of the S clones were serially propagated, they showed a very great capacity for proliferation, transferring into 510, 85 and 110 recipients each. When their cells were tested at subsequent passages, they recovered early after inhibition by radioactive antigen. Two S clones may still have been somewhat refractory to suicide but, probably in all three, rapid proliferation was largely responsible for the recovery of the few cells escaping suicide, and helped them to appear suicide resistant.

I-active antigen of human erythrocyte membrane

Abstract. An I‐active substance was isolated from the aqueous layer obtained after extraction of human erythrocyte membranes with n‐butanol. This substance was found to be identical with the antigens with A, B, and H blood group specificity which we had isolated previously. Thus, all A, B, H and I blood group activity in aqueous extracts of erythrocyte membranes is dependent upon the same kind of antigenic material which may carry different blood group specificities. The material is sialic acid free and comprises about 90% carbohydrate.