Journal
JOURNAL OF IMMUNOLOGY
Volume 164, Issue 11, Pages 6041-6045Publisher
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.164.11.6041
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Human bladder carcinoma line LB831-BLC expresses several distinct Ags that are recognized by different autologous CTL, Here, we show that one of these Ags is presented by HLA-Cw7 and encoded by gene MAGE-A12, This is the first time that CTL directed against a MAGE-encoded Ag have been derived from the lymphocytes of a patient with cancer other than melanoma, This new Ag was found to be nonapeptide VRIGHLYIL, corresponding to position 170-178 of the MAGE-A12 protein. Gene MAGE-A12 is silent in normal tissues except in male germline cells, which do not express HLA molecules. It is expressed in 26-62% of melanomas, infiltrating bladder carcinomas, lung carcinomas, esophageal carcinomas, and head and neck carcinomas. Because HLA-Cw7 is present in 43% of Caucasians, this new Ag is shared by many tumors and should be a useful target for cancer immunotherapy.
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