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• W4361822957 abstract "<div>Abstract<p>As a cytoplasmic sensor of double-stranded DNA (dsDNA), the cyclic GMP-AMP synthase–stimulator of IFN genes (STING) pathway plays an important role in antitumor immunity. In this study, we investigated the effect of Src homology-2 domain-containing protein tyrosine phosphatase-2 (SHP2) on tumor cell–intrinsic STING pathway activity and DNA repair in colon cancer. SHP2 interacted with and dephosphorylated PARP1 after DNA damage. PARP1 inhibition by SHP2 resulted in reduced DNA repair and accumulation of dsDNA in cells, thus promoting hyperactivation of the STING pathway. The SHP2 agonist lovastatin was able to enhance SHP2 activity and promote STING pathway activation. Moreover, lovastatin significantly enhanced the efficacy of chemotherapy in colon cancer models, in part via STING pathway-mediated antitumor immunity. These findings suggest that SHP2 exacerbates STING pathway activation by restricting PARP1-mediated DNA repair in tumor cells, providing a basis for the combined use of lovastatin and chemotherapy in the treatment of colon cancer.</p>Significance:<p>Dephosphorylation of PARP1 by SHP2 simultaneously suppresses DNA repair and enhances STING pathway-mediated antitumor immunity, highlighting SHP2 activation as a potential therapeutic approach in colon cancer.</p></div>" @default.
• W4361822957 created "2023-04-05" @default.
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• W4361822957 date "2023-03-31" @default.
• W4361822957 modified "2023-10-18" @default.
• W4361822957 title "Data from SHP2-Mediated Inhibition of DNA Repair Contributes to cGAS–STING Activation and Chemotherapeutic Sensitivity in Colon Cancer" @default.
• W4361822957 doi "https://doi.org/10.1158/0008-5472.c.6513226.v1" @default.
• W4361822957 hasPublicationYear "2023" @default.
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