Sustained Type I interferon signaling as a mechanism of resistance to PD-1 blockade
Details
Publication Year 2019-10,Volume 29,Issue #10,Page 846-861
Journal Title
Stem Cell Research
Publication Type
Journal Article
Abstract
PD-1 blockade represents a major therapeutic avenue in anticancer immunotherapy. Delineating mechanisms of secondary resistance to this strategy is increasingly important. Here, we identified the deleterious role of signaling via the type I interferon (IFN) receptor in tumor and antigen presenting cells, that induced the expression of nitric oxide synthase 2 (NOS2), associated with intratumor accumulation of regulatory T cells (Treg) and myeloid cells and acquired resistance to anti-PD-1 monoclonal antibody (mAb). Sustained IFNbeta transcription was observed in resistant tumors, in turn inducing PD-L1 and NOS2 expression in both tumor and dendritic cells (DC). Whereas PD-L1 was not involved in secondary resistance to anti-PD-1 mAb, pharmacological or genetic inhibition of NOS2 maintained long-term control of tumors by PD-1 blockade, through reduction of Treg and DC activation. Resistance to immunotherapies, including anti-PD-1 mAb in melanoma patients, was also correlated with the induction of a type I IFN signature. Hence, the role of type I IFN in response to PD-1 blockade should be revisited as sustained type I IFN signaling may contribute to resistance to therapy.
Publisher
Springer Nature
Research Division(s)
Immunology
PubMed ID
31481761
Open Access at Publisher's Site
https://doi.org/10.1038/s41422-019-0224-x
Terms of Use/Rights Notice
Refer to copyright notice on published article.


Creation Date: 2019-09-20 10:16:32
Last Modified: 2019-10-28 11:28:34
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