A peptide antigen derived from EGFR T790M is immunogenic in non-small cell lung cancer
| Autor: | Kazuya Ofuji, Keigo Saito, Toshiaki Yoshikawa, Tetsuya Nakatsura, Manami Shimomura, Yasunari Nakamoto, Yoshitaka Tada, Mayuko Yoshimura |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Cancer Research
medicine.medical_treatment Apoptosis EGFR T790M Erlotinib Hydrochloride T790M CTL epitope Gefitinib Antigen Epidermal growth factor Carcinoma Non-Small-Cell Lung Cell Line Tumor HLA-A2 Antigen medicine Humans Epidermal growth factor receptor non-small cell lung cancer Cell Proliferation biology acquired resistance Articles Immunotherapy Molecular biology respiratory tract diseases ErbB Receptors Oncology Drug Resistance Neoplasm Mutation Quinazolines Cancer research biology.protein Erlotinib Peptides medicine.drug |
| Zdroj: | International Journal of Oncology |
| ISSN: | 1791-2423 1019-6439 |
| DOI: | 10.3892/ijo.2014.2787 |
| Popis: | Lung cancer is the leading cause of cancer‑related deaths worldwide. Epidermal growth factor receptor-tyrosine kinase inhibitors (EGFR-TKIs), such as gefitinib and erlotinib, have demonstrated marked clinical activity against non-small cell lung cancer (NSCLC) harboring activating epidermal growth factor receptor (EGFR) mutations. However, in most cases, patients develop acquired resistance to EGFR‑TKI therapy. The threonine to methionine change at codon 790 of EGFR (EGFR T790M) mutation is the most common acquired resistance mutation, and is present in ~50% cases of TKI resistance. New treatment strategies for NSCLC patients harboring the EGFR T790M mutation are required. We evaluated the immunogenicity of an antigen derived from EGFR with the T790M mutation. Using BIMAS we selected several EGFR T790M‑derived peptides bound to human leukocyte antigen (HLA)-A*02:01. T790M-A peptide (789-797) (IMQLMPFGC)-specific cytotoxic T lymphocytes (CTLs) were induced from peripheral blood mononuclear cells (PBMCs) of HLA-A2+ healthy donors. An established T790M-A-specific CTL line showed reactivity against the NCSLC cell line, H1975-A2 (HLA-A2+, T790M+), but not H1975 (HLA-A2-, T790M+), and the corresponding wild-type peptide (ITQLMPFGC)-pulsed T2 cells using an interferon-γ (IFN-γ) enzyme-linked immuno spot (ELISPOT) assay. This CTL line also demonstrated peptide-specific cytotoxicity against H1975-A2 cells. This finding suggests that the EGFR T790M mutation-derived antigen could be a new target for cancer immunotherapy. |
| Databáze: | OpenAIRE |
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