ArticleThe Journal of clinical investigation2026
Polyamine sequestration of 2'3'-cGAMP constrains intercellular transmission and STING engagement to subvert antitumor immunity.
Article in The Journal of clinical investigation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Spermine: an endogenous iron chelator that suppresses ferroptosis.Molecular biomedicine · 2026Article
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Authors and funding
14 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The cyclic dinucleotide 2'3'-cyclic guanosine monophosphate-adenosine monophosphate (2'3'-cGAMP) serves as a central immunotransmitter that propagates stimulator of interferon gene-dependent (STING-dependent) innate immunity across tissues; however, how microenvironmental metabolites regulate its spatiotemporal dynamics remains unknown. Here, we identified polyamines (spermine and spermidine) as critical rheostats controlling 2'3'-cGAMP functionality. Mechanistically, polyamines sequestered 2'3'-cGAMP into polymer-like aggregates, blocking intercellular propagation and suppressing intracellular STING activation by reducing ligand-receptor binding affinity. Deficiency of spermidine and spermine N1-acetyltransferase 1 (SAT1), the rate-limiting enzyme in polyamine catabolism, elevated polyamine levels to entrap extracellular 2'3'-cGAMP and inhibit STING activation. Synergistic administration of endogenous 2'3'-cGAMP with SAT1 stabilizer N1,N11-diethylnorspermine restored 2'3'-cGAMP bioavailability and STING signaling, facilitated type I interferon responses to reprogram immunologically suppressive tumors into immunologically active states and enhanced tumor clearance. Our study established polyamine-cGAMP interactions as a critical spatiotemporal regulatory mechanism for tissue-level immunity, providing a unified model for metabolite-mediated cyclic GMP-AMP synthase-STING (cGAS-STING) regulation across diseases.
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