We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Neoepitope targets of tumour-infiltrating lymphocytes from patients with pancreatic cancer.
- Authors
Meng, Qingda; Valentini, Davide; Rao, Martin; Moro, Carlos Fernández; Paraschoudi, Georgia; Jäger, Elke; Dodoo, Ernest; Rangelova, Elena; del Chiaro, Marco; Maeurer, Markus
- Abstract
<bold>Background: </bold>Pancreatic cancer exhibits a poor prognosis and often presents with metastasis at diagnosis. Immunotherapeutic approaches targeting private cancer mutations (neoantigens) are a clinically viable option to improve clinical outcomes.<bold>Methods: </bold>3/40 TIL lines (PanTT26, PanTT39, PanTT77) were more closely examined for neoantigen recognition. Whole-exome sequencing was performed to identify non-synonymous somatic mutations. Mutant peptides were synthesised and assessed for antigen-specific IFN-γ production and specific tumour killing in a standard Cr51 assay. TIL phenotype was tested by flow cytometry. Lymphocytes and HLA molecules in tumour tissue were visualised by immunohistochemistry.<bold>Results: </bold>PanTT26 and PanTT39 TILs recognised and killed the autologous tumour cells. PanTT26 TIL recognised the KRASG12v mutation, while a PanTT39 CD4+ TIL clone recognised the neoepitope (GLLRYWRTERLF) from an aquaporin 1-like protein (gene: K7N7A8). Repeated stimulation of TILs with the autologous tumour cells line lead to focused recognition of several mutated targets, based on IFN-γ production. TILs and corresponding PBMCs from PanTT77 showed shared as well as mutually exclusively tumour epitope recognition (TIL-responsive or PBMC-responsive).<bold>Conclusion: </bold>This study provides methods to robustly screen T-cell targets for pancreatic cancer. Pancreatic cancer is immunogenic and immunotherapeutic approaches can be used to develop improved, targeted therapies.
- Publication
British Journal of Cancer, 2019, Vol 120, Issue 1, p97
- ISSN
0007-0920
- Publication type
journal article
- DOI
10.1038/s41416-018-0262-z