title: Blood group MN precursors as human breast carcinoma-associated antigens and "naturally" occurring human cytotoxins against them.
abstract: Blood groups MN active substances were found in benign and malignant human mammary glands. However, the precursor T (Thomsen-Friedenreich) antigen, as determined with human sera, occurred in all cancerous breast tissues tested but not in the benign mammary glands. Anti-T antibody, which is present in all human sera, was severely depressed in 21.16% of 189 breast carcinoma patients, compared with 3.62% of 470 persons of similar age without cancer. Of 720 persons tested approximately 85% of those with severely depressed anti-T had carcinoma; their IgG, IgM and IgA concentrations were of normal range. A greater than 25%-90% increase in anti-T titer score was found in 65.6% of 32 patients bled 1-14 months after mastectomy for carcinoma as compared with 3.1% of 32 patients with breast biopsy who had no carcinoma. All differences in anti-T titer score changes reported are statistically highly significant. Injection of T antigen from human erythrocytes increased anti-T titer scores.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000818:Animals; D000917:Antibody Formation; D000951:Antigens, Neoplasm / Q000032:analysis; D001789:Blood Group Antigens; D001941:Breast Diseases / Q000097:blood; D001943:Breast Neoplasms / Q000097:blood* / Q000276:immunology; D000939:Epitopes; D005260:Female; D006801:Humans; D007518:Isoantibodies / Q000032:analysis; D008951:MNSs Blood-Group System; D008325:Mammary Neoplasms, Experimental / Q000276:immunology; D051379:Mice; D008875:Middle Aged; D013997:Time Factors
chemical_list: D000951:Antigens, Neoplasm; D001789:Blood Group Antigens; D000939:Epitopes; D007518:Isoantibodies; D008951:MNSs Blood-Group System