| Literature DB >> 32820126 |
Chenguang Yu1,2, Vincent F Vartabedian3, Ying Jia1,3, H Michael Petrassi4, Emily N Chin1, Manoj Kumar2, Ana M Gamo2, William Vernier2, Sabrina H Ali1, Mildred Kissai1, Daniel C Lazar3, Nhan Nguyen3, Laura E Pereira1, Brent Benish2, Ashley K Woods2, Sean B Joseph2, Alan Chu2, Kristen A Johnson2, Philipp N Sander1, Francisco Martínez-Peña1, Eric N Hampton2, Travis S Young2, Dennis W Wolan5, Arnab K Chatterjee2, Peter G Schultz1,2, John R Teijaro6, Luke L Lairson7.
Abstract
Stimulator of interferon genes (STING) links innate immunity to biological processes ranging from antitumor immunity to microbiome homeostasis. Mechanistic understanding of the anticancer potential for STING receptor activation is currently limited by metabolic instability of the natural cyclic dinucleotide (CDN) ligands. From a pathway-targeted cell-based screen, we identified a non-nucleotide, small-molecule STING agonist, termed SR-717, that demonstrates broad interspecies and interallelic specificity. A 1.8-angstrom cocrystal structure revealed that SR-717 functions as a direct cyclic guanosine monophosphate-adenosine monophosphate (cGAMP) mimetic that induces the same "closed" conformation of STING. SR-717 displayed antitumor activity; promoted the activation of CD8+ T, natural killer, and dendritic cells in relevant tissues; and facilitated antigen cross-priming. SR-717 also induced the expression of clinically relevant targets, including programmed cell death 1 ligand 1 (PD-L1), in a STING-dependent manner.Entities:
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Year: 2020 PMID： 32820126 DOI： 10.1126/science.abb4255
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728