Identification of novel epitopes from human papillomavirus type 18 E7 that can sensitize PBMCs of multiple HLA class I against human cervical cancerReport as inadecuate




Identification of novel epitopes from human papillomavirus type 18 E7 that can sensitize PBMCs of multiple HLA class I against human cervical cancer - Download this document for free, or read online. Document in PDF available to download.

Journal of Translational Medicine

, 12:229

Immunobiology and immunotherapy

Abstract

BackgroundTo identify the novel epitopes from the human papillomavirus type 18 E7 which can sensitize PBMCs of four different major HLA class I A allele.

MethodsTwenty-four synthetic overlapping 15-amino acid peptides were screened by measuring the frequency of CD8 cytotoxic T lymphocytes CTLs-producing interferon-γ IFN-γ by using flow cytometry and ELISpot assays and selected peptides were validated for cytolytic activity by using the Cr release assay. Truncated peptides in the selected epitopes were tested to determine the important residues using ELISpot and Cr release assay.

ResultsAmong 24 peptides, E781-95DDLRAFQQLFLNTLS #21 and E789-103LFLNTLSFVCPWCAS #23 induced significantly higher Th 1 response including IFN-γ production and in vitro cytotoxicity of PBMCs of four different HLA-A alleles against cervical cancer cells than that of other peptides and the negative control no peptide sensitization. In E781–95 #21, amino acid position 81, 82 N-terminus and 92, 94, 95 C-terminus for HLA-A*02:02 and 24:02, and 81, 82 N-terminus and 92, 95 C-terminus for HLA-A*11:01 and 33:03 were important to elicit Th1 response of PBMCS. In E789–103 #23, residue 100 and103 C-terminus were important to elicit the CD8 CTL response in HLA-A*02:01, 11:01 and 33:03 and 100, 101, and 103 C-terminus were important to elicit the CD8 CTL response in HLA-A*24:02.

ConclusionsE781–95 #21 and E789–103 #23 were identified as novel epitopes from HPV18 E7 which could sensitized PBMCs of four different HLA class I HLA-A*02:01, 24:02, 11:01 and 33:03. These epitopes could be useful for immune monitoring and immunotherapy for HPV 18+ cervical cancer.

KeywordsHLA class I HPV18 E7 Immunotherapy Cervical cancer Epitopes Electronic supplementary materialThe online version of this article doi:10.1186-s12967-014-0229-7 contains supplementary material, which is available to authorized users.

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Author: Sunghoon Kim - Hye Won Chung - Kyoung-Ryul Lee - Jong-Baeck Lim

Source: https://link.springer.com/



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