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  • Title: Naturally processed and HLA-B8-presented HPV16 E7 epitope recognized by T cells from patients with cervical cancer.
    Author: Oerke S, Höhn H, Zehbe I, Pilch H, Schicketanz KH, Hitzler WE, Neukirch C, Freitag K, Maeurer MJ.
    Journal: Int J Cancer; 2005 May 01; 114(5):766-78. PubMed ID: 15609316.
    Abstract:
    Several major histocompatibility complex (MHC) alleles have been reported to present peptides derived from the HPV16 E7 oncoprotein to T cells. We describe an overrepresentation of the HLA-B8 allele (28.44%) in cervical cancer patients as compared to the MHC class I allele frequency in a local healthy control population (18.80%) and the identification of an HLA-B8-binding peptide TLHEYMLDL (HPV16 E7(7-15)), which is able to drive HPV16 E7-specific and MHC class I-restricted T-cell responses in peripheral blood lymphocytes from healthy individuals. TLHEYMLDL-specific T cells recognize the naturally processed and presented peptide on HPV16+ cervical cancer cells transfected with the HLA-B8 gene defined by IFN-gamma production. This peptide epitope is also recognized by freshly harvested tumor-infiltrating T cells or T cells from tumor-draining lymph nodes from patients with cervical cancer determined by flow cytometry as well as by tetramer in situ staining. HLA-B8-restricted HPV E7(7-15)-specific T cells reside predominantly in the CD8+ CD45RA+ CCR7+ precursor or in the differentiated CD8+ CD45RA+ CCR7- T-cell population.
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