Abstract

Medullary breast carcinoma (MBC) is a relatively rare malignancy with heavy lymphocytic infiltration that despite cytologically anaplastic features and high mitotic index has more favorable prognosis than other types of breast cancer. Lymphocytic infiltration of tumors reflects ongoing immune response against tumor antigens which could represent a great interest as potential targets for cancer immunotherapy. The search for MBC antigens by SEREX methodology has not been successful due to a very high titer of false positive clones, representing immunoglobulin genes. Here, we describe a novel approach for generating cDNA expression libraries from MBC tumor samples which are depleted of IgG cDNA clones and, therefore, are suitable for the identification of novel tumor-associated antigens (TAA) by SEREX approach. Modified methodology allowed us to isolate a panel of known and novel TAA which are currently under further investigation.

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