title: Antibody-dependent cellular cytotoxicity (ADCC) in colorectal carcinoma. II. Blood group association.
abstract: Colorectal carcinoma patients' sera with ADCC antibody reacting with the HT-29 cell line (blood group A) generally (88%) cross-reacted with another group A cell line (COLO-394) but much less frequently (6-33%), with six tumor cell lines that did not express ABO blood group antigens. The findings suggested the possibility that the ADCC reactivity against the HT-29 cell line particularly by patients of blood group O is generally via "A" or "A-like" antigenicity of the target cells. This was supported by absorption studies that showed that the ADCC reactivity could be removed by blood group A but never by group B erythrocytes. Our results suggest that the prognostically favorable ADCC antibody in colorectal carcinoma patients' sera is of anti-blood group A specificity or cross reactivity.
mesh_terms: D000017:ABO Blood-Group System; D000920:Antibody-Dependent Cell Cytotoxicity; D002277:Carcinoma / Q000097:blood / Q000276:immunology; D002460:Cell Line; D003110:Colonic Neoplasms / Q000097:blood* / Q000276:immunology; D003429:Cross Reactions; D005455:Fluorescent Antibody Technique; D006801:Humans; D007694:Killer Cells, Natural / Q000276:immunology; D008545:Melanoma / Q000097:blood / Q000276:immunology; D011379:Prognosis; D012004:Rectal Neoplasms / Q000097:blood* / Q000276:immunology
chemical_list: D000017:ABO Blood-Group System