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A common problem of PC is the development of resistance against apoptosis that limits therapeutic success. Here we demonstrate that the prototypical Smac mimetic BV6 cooperates with the stimulator of interferon (IFN) genes (STING) ligand 2\u2032,3\u2032-cyclic guanosine monophosphate\u2013adenosine monophosphate (2\u20323\u2032-cGAMP) to trigger necroptosis in apoptosis-deficient PC cells. Pharmacological inhibition of key components of necroptosis signaling, such as receptor-interacting protein 1 (RIPK1), RIPK3, and mixed lineage kinase domain-like protein (MLKL), significantly rescues PC cells from 2\u20323\u2032-cGAMP\/BV6\/zVAD.fmk-mediated cell death, suggesting the induction of necroptosis. Consistently, 2\u20323\u2032-cGAMP\/BV6 co-treatment promotes phosphorylation of MLKL. Furthermore, we show that 2\u20323\u2032-cGAMP stimulates the production of type I IFNs, which cooperate with BV6 to trigger necroptosis in apoptosis-deficient settings. STING silencing via siRNA or CRISPR\/Cas9-mediated gene knockout protects PC cells from 2\u20323\u2032-cGAMP\/BV6\/zVAD.fmk-mediated cell death. Interestingly, we demonstrate that nuclear factor-\u03baB (NF-\u03baB), tumor necrosis factor-\u03b1 (TNF\u03b1), and IFN-regulatory factor 1 (IRF1) signaling are involved in triggering 2\u20323\u2032-cGAMP\/BV6\/zVAD.fmk-induced necroptosis. In conclusion, we show that activated STING and BV6 act together to exert antitumor effects on PC cells with important implications for the design of new PC treatment concepts.<\/jats:p>","DOI":"10.1038\/s41419-021-04014-x","type":"journal-article","created":{"date-parts":[[2021,8,30]],"date-time":"2021-08-30T07:16:54Z","timestamp":1630307814000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["The Smac mimetic BV6 cooperates with STING to induce necroptosis in apoptosis-resistant pancreatic carcinoma cells"],"prefix":"10.1038","volume":"12","author":[{"given":"Sabine","family":"Hannes","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rebekka","family":"Karlowitz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6532-7651","authenticated-orcid":false,"given":"Sjoerd J. 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