Abstract
Here, we utilized spontaneous models of pancreatic and lung cancer to examine how neoantigenicity shapes tumor immunity and progression. As expected, neoantigen expression during lung adenocarcinoma development leads to T cell-mediated immunity and disease restraint. By contrast, neoantigen expression in pancreatic ductal adenocarcinoma (PDAC) results in exacerbation of a fibro-inflammatory microenvironment that drives disease progression and metastasis. Pathogenic TH17 responses are responsible for this neoantigen-induced tumor progression in PDAC. Underlying these divergent T cell responses in pancreas and lung cancer are differences in infiltrating conventional dendritic cells (cDCs). Overcoming cDC deficiency in early-stage PDAC leads to disease restraint, while restoration of cDC function in advanced PDAC restores tumor-restraining immunity and enhances responsiveness to radiation therapy.
Original language | English |
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Pages (from-to) | 289-307.e9 |
Journal | Cancer Cell |
Volume | 37 |
Issue number | 3 |
DOIs | |
State | Published - Mar 16 2020 |
Keywords
- CD40
- Flt3L
- dendritic cell
- immune surveillance
- immunotherapy
- neoantigen
- pancreatic cancer
- radiation therapy
- vaccination