Two novel squamous cell carcinoma antigen-derived HLA-A*0201-binding peptides induce in vitro and in vivo CD8+ cytotoxic T lymphocyte responses.

Abstract:

:Squamous cell carcinoma antigen (SCCA) is overexpressed in many squamous cell cancers and SCCA‑derived peptide-specific CD8(+) cytotoxic T lymphocytes can display cytotoxicity against tumor cells. In the present study, we screened the SCCA amino acid sequence for potential HLA-A*0201-binding CD8(+) T‑cell epitopes using two predictive computational algorithms. Seven epitope candidates were selected of which SCCA(246-254)(llpneidgl), SCCA(223-231)(sledvqakv), SCCA(328‑336)(vlhkafvev) and SCCA(324‑332)(vlsgvlhka) significantly stabilized HLA-A*0201 molecules on T2 cells. Both SCCA(328‑336) and SCCA(324-332) induced CD8(+) IFN-γ(+) T‑cell responses in HLA-A*0201-positive peripheral blood mononuclear cells as assessed by intracellular cytokine staining. Consistent with this, immunization with either SCCA(328-336) or SCCA(324‑332) effectively elicited CD8(+) IFN-γ(+) T cells in HLA-A*0201 transgenic mice as visualized by IFN-γ ELISPOT assay and intracellular cytokine staining. Furthermore, CD8(+) T cells induced in vitro or in vivo by SCCA(328-336) or SCCA(324-332) demonstrated in vitro cytotoxicity against peptide-pulsed T2 cells and splenocytes, respectively. These novel SCCA‑derived CD8(+) T‑cell epitopes described, herein, may be potentially important components for diagnostic reagents and immunotherapeutic vaccines for the treatment of squamous cell carcinomas.

journal_name

Int J Oncol

authors

Duan ZL,Wang ZB,Guo JL,Liu WQ,Hu J,Li J,Wang SN,Li Q,Wen JS

doi

10.3892/ijo.2013.1834

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

1482-92

issue

4

eissn

1019-6439

issn

1791-2423

journal_volume

42

pub_type

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