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The host STING pathway at the interface of cancer and immunity
Leticia Corrales, … , Thomas W. Dubensky Jr., Thomas F. Gajewski
Leticia Corrales, … , Thomas W. Dubensky Jr., Thomas F. Gajewski
Published July 1, 2016
Citation Information: J Clin Invest. 2016;126(7):2404-2411. https://doi.org/10.1172/JCI86892.
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Review

The host STING pathway at the interface of cancer and immunity

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Abstract

A major subset of human cancers shows evidence for spontaneous adaptive immunity, which is reflected by the presence of infiltrating CD8+ T cells specific for tumor antigens within the tumor microenvironment. This observation has raised the question of which innate immune sensing pathway might detect the presence of cancer and lead to a natural adaptive antitumor immune response in the absence of exogenous infectious pathogens. Evidence for a critical functional role for type I IFNs led to interrogation of candidate innate immune sensing pathways that might be triggered by tumor presence and induce type I IFN production. Such analyses have revealed a major role for the stimulator of IFN genes pathway (STING pathway), which senses cytosolic tumor–derived DNA within the cytosol of tumor-infiltrating DCs. Activation of this pathway is correlated with IFN-β production and induction of antitumor T cells. Based on the biology of this natural immune response, pharmacologic agonists of the STING pathway are being developed to augment and optimize STING activation as a cancer therapy. Intratumoral administration of STING agonists results in remarkable therapeutic activity in mouse models, and STING agonists are being carried forward into phase I clinical testing.

Authors

Leticia Corrales, Sarah M. McWhirter, Thomas W. Dubensky Jr., Thomas F. Gajewski

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