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  • Title: Tissue distribution of breast cancer-associated antigens defined by monoclonal antibodies.
    Author: Frankel AE, Ring DB, Tringale F, Hsieh-Ma ST.
    Journal: J Biol Response Mod; 1985 Jun; 4(3):273-86. PubMed ID: 4020386.
    Abstract:
    Balb/c mice were immunized with membrane preparations of primary and metastatic breast carcinomas or with live breast cancer cell lines. Sixty-two fusions were performed between immune splenocytes and SP2/0 mouse myeloma cells, and 107 hybridomas were cloned that produced antibody reactive with breast cancer membrane extract, cell lines, and frozen sections, but not with normal tissue membrane extracts or a human fibroblast line. Ninety-four monoclonal antibodies were purified and tested for binding to 16 normal tissue frozen sections and five blood cell types. Thirty-five of the 94 antibodies were also tested on breast cancer sections from 21 patients, 14 breast cancer cell lines, and 11 nonbreast tumor sections. Two of 94 antibodies showed no reactivity to any of the 21 normal tissues or 11 nonbreast neoplasms studied. These two antibodies, 451B7 and 452F2, bound 60% of the breast cancer cell lines and 25% of the breast cancer tissue sections. Eight additional antibodies bound three or fewer of 21 normal tissues. These antibodies bound 25-85% of breast cancer sections, 0-75% of breast cancer cell lines, and many of the nonbreast cancers. A comparison of normal tissues and nonbreast tumors bound by the breast cancer-reactive antibodies indicated that most of the cross-reacting normal tissue structures were epithelial in origin, and that the most cross-reactive nonbreast cancers were those of secondary sex organs (uterus, prostate, ovary).
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