Targeting CXCL12 from FAP-expressing carcinoma-associated fibroblasts synergizes with anti-PD-L1 immunotherapy in pancreatic cancer

Feig, C., Jones, J. O., Kraman, M., Wells, R. J. B., Deonarine, A., Chan, D. S., Connell, C. M., Roberts, E. W., Zhao, Q., Caballero, O. L., Teichmann, S. A., Janowitz, T., Jodrell, D. I., Tuveson, D. A., Fearon, D. T. (December 2013) Targeting CXCL12 from FAP-expressing carcinoma-associated fibroblasts synergizes with anti-PD-L1 immunotherapy in pancreatic cancer. Proceedings of the National Academy of Sciences of the United States of America, 110 (50). pp. 20212-20217. ISSN 00278424 (ISSN)

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Abstract

An autochthonous model of pancreatic ductal adenocarcinoma (PDA) permitted the analysis of why immunotherapy is ineffective in this human disease. Despite finding that PDA-bearing mice had cancer cell-specific CD8+ T cells, the mice, like human patients with PDA, did not respond to two immunological checkpoint antagonists that promote the function of T cells: anti-cytotoxic T-lymphocyte-associated protein 4 (α-CTLA-4) and α-programmed cell death 1 ligand 1 (α-PD-L1). Immune control of PDA growth was achieved, however, by depleting carcinoma-associated fibroblasts (CAFs) that express fibroblast activation protein (FAP). The depletion of the FAP+ stromal cell also uncovered the antitumor effects of α-CTLA-4 and α-PD-L1, indicating that its immune suppressive activity accounts for the failure of these T-cell checkpoint antagonists. Three findings suggested that chemokine (C-X-C motif) ligand 12 (CXCL12) explained the overriding immunosuppression by the FAP+ cell: T cells were absent from regions of the tumor containing cancer cells, cancer cells were coated with the chemokine, CXCL12, and the FAP+ CAF was the principal source of CXCL12 in the tumor. Administering AMD3100, a CXCL12 receptor chemokine (C-X-C motif) receptor 4 inhibitor, induced rapid T-cell accumulation among cancer cells and acted synergistically with α-PD-L1 to greatly diminish cancer cells, which were identified by their loss of heterozygosity of Trp53 gene. The residual tumor was composed only of premalignant epithelial cells and in flammatory cells. Thus, a single protein, CXCL12, from a single stromal cell type, the FAP+ CAF, may direct tumor immune evasion in a model of human PDA.

Item Type:	Paper
Uncontrolled Keywords:	KPC mouse T cell exclusion Tumor immunogenicity Tumor stroma
Subjects:	diseases & disorders organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells organs, tissues, organelles, cell types and functions > cell types and functions > cell types > T cells organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts organs, tissues, organelles, cell types and functions > cell types and functions > cell types > fibroblasts diseases & disorders > cancer > cancer types > pancreatic cancer
CSHL Authors:	Tuveson, David A. Fearon, Douglas Janowitz, Tobias
Communities:	CSHL Cancer Center Program > Signal Transduction CSHL Cancer Center Shared Resources > Flow Cytometry Service CSHL labs > Fearon lab CSHL labs > Tuveson lab CSHL labs > Janowitz lab
Highlight:	Janowitz, Tobias
Depositing User:	Matt Covey
Date:	December 2013
Date Deposited:	07 Jan 2014 19:28
Last Modified:	10 Oct 2018 16:52
PMCID:	PMC3864274
Related URLs:	Publisher
URI:	https://repository.cshl.edu/id/eprint/29204

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