Heat Shock Cognate Protein 70 Encodes Antigenic Epitopes Recognised by HLA-B4601-restricted Cytotoxic T Lymphocytes from Cancer Patients

Overview

Journal Br J Cancer

Specialty Oncology

Date 2003 Sep 11

PMID 12966429

Citations 5

Authors

K Azuma

S Shichijo

H Takedatsu

N Komatsu

H Sawamizu

K Itoh

Affiliations

Soon will be listed here.

Abstract

Heat shock cognate protein 70 (HSC70), a highly conserved protein and a member of the family of molecular chaperones, has the ability to induce cytotoxic T lymphocyte (CTL) responses through binding and carrying antigenic peptides. We demonstrated in this study that the HSC70 gene encodes two antigenic peptides recognised by HLA-B46-restricted and tumour-reactive CTLs established from tumour-infiltrating lymphocytes of a colon cancer. These HSC70-derived peptides, at amino-acid positions 106-114 and 233-241, had the ability to induce HLA-B46-restricted and peptide-specific CTLs, which are reactive to tumour cells, from peripheral blood mononuclear cells of the majority of epithelial cancer patients tested. These results, along with those from the previous studies, indicate the two ways of HSC70 involvement in the immune responses to tumours: chaperones and antigens, and thus may provide a new insight for the development of HSC70-directed cancer-specific immunotherapy.

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