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SAMHD1 Research Digest — 2026-05-24

Generated by samhd1_monitor | Model: claude-sonnet-4-6

Summary: 6 papers evaluated | 4 high-relevance (≥7) | 2 medium (5–6) | 0 low (3–4) | 0 scored <3

🔴 High Relevance (Score 7–10)

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Mitochondrial DNA-mediated cGAS-STING activation and its crosstalk with NLRP3 inflammasome in chronic obstructive pulmonary disease. (from Pulmonology/Respiratory Medicine)
Jindal Disha; Chopra Vishal; Garg Kranti; Sharma Siddharth — 2026
Score: 8/10 | Pathways: cGAS-STING, NLRP3, POLG-mtDNA, VDAC1, ME-CFS

This paper directly addresses the two core parallel inflammatory streams of the disease model—mtDNA-mediated cGAS-STING activation (BLUE pathway) and NLRP3 inflammasome crosstalk (PURPLE/GOLD pathways)—in a context of chronic oxidative mtDNA damage and cytosolic mtDNA release, mechanistically mirroring the SAMHD1 haploinsufficiency syndrome even though COPD is the disease context.
DOI: 10.1016/j.cytogfr.2026.05.001

Piezo1 mediates hypoxia-induced endometriosis fibrosis via the mtDNA -dependent cGAS-STING pathway. (from Gynecology/reproductive medicine)
Ouyang Zhuqing; Zhang Lanyue; Tan Jiarong; Shen Fujin — 2026
Score: 7/10 | Pathways: cGAS-STING, VDAC1, POLG-mtDNA, clinical-phenotype

This paper directly demonstrates the mtDNA leakage → cGAS-STING activation axis as a driver of fibrosis, a core Blue pathway mechanism in the SAMHD1 syndrome, and contextualizes it in a gynecological tissue relevant to the family's endometrial carcinoma phenotype, while the Ca²⁺-dependent mitochondrial damage mechanism provides a novel upstream trigger converging on the same cGAS-STING node.
DOI: 10.1186/s12967-026-08255-2

Mitochondrial DNA release contributes to neuropathic pain via a cGAS-STING-IRF3-CMPK2-associated immunometabolic feedback mechanism. (from Neurology/pain medicine)
Wang Bo; Zeng Hui; Zhan Hongrui; Xu Yin; Hu Ziwei — 2026
Score: 7/10 | Pathways: cGAS-STING, POLG-mtDNA, VDAC1, ME-CFS, other

This paper directly characterizes an IRF3-CMPK2 positive feedback loop downstream of mtDNA-cGAS-STING activation — where CMPK2 (a dNTP synthesis enzyme) sustains mitochondrial stress and mtDNA release — which maps precisely onto the BLUE stream (VDAC1→mtDNA escape→cGAS→STING→IRF3) of the SAMHD1 haploinsufficiency mechanism, and introduces CMPK2-mediated dNTP pool dysregulation as a novel amplification node that is highly relevant to the dNTPase-deficient context of SAMHD1 p.A565T; NDGA as a pharmacological inhibitor of this loop also represents a potential treatment target.
DOI: 10.1186/s12967-026-08314-8

Jintiange ameliorates age-related sarcopenia by inhibiting the cGAS-STING signaling pathway via maintaining mitochondrial homeostasis. (from Ethnopharmacology/Musculoskeletal medicine)
Xu Yuan; Li Xiao-Li; Guo Yi-Xun; Wu Ruo-Bing; He Ming-Chao — 2026
Score: 7/10 | Pathways: cGAS-STING, ISG15-mitophagy, POLG-mtDNA, treatment-target, other

This paper directly demonstrates that inhibiting cGAS-STING via mitochondrial homeostasis maintenance (PGC-1α biogenesis, MFN1 dynamics, PINK1/Parkin mitophagy) ameliorates sarcopenia, hitting three of the four core disease streams (BLUE cGAS-STING, RED ISGylation-mitophagy block, PURPLE mtDNA quality) simultaneously, and identifies a treatment modality acting upstream of the same nodes relevant to SAMHD1 haploinsufficiency pathology.
DOI: 10.1016/j.jep.2026.121873

🟡 Medium Relevance (Score 5–6)

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A novel bifunctional peptide predicted to target neuropeptide Y4 and GLP-1 receptors alleviates cognitive deficits in 5 × FAD mice by modulating cGAS-STING-mediated neuroinflammation. (from Neurology/Alzheimer's disease pharmacology)
Feng Yijie; Zhang Caili; Wei Yinuo; Liu Enhua; Sun Hongyu — 2026
Score: 6/10 | Pathways: cGAS-STING, POLG-mtDNA, NLRP3, treatment-target, other

This paper directly demonstrates that cytosolic mtDNA release activates cGAS-STING-IRF3-IL-1β neuroinflammatory signaling (a core Loop A/B pathway in the SAMHD1 disease model) and that pharmacological suppression of this axis is therapeutically beneficial, providing mechanistic and treatment-relevant data for the mtDNA-cGAS-STING cascade central to SAMHD1 haploinsufficiency, albeit in an AD rather than interferonopathy context.
DOI: 10.1016/j.bcp.2026.118074

Fucoxanthin improves stomatitis by regulating mitochondrial function and cGAS-STING signaling. (from Dentistry/oral medicine)
Lin Caipeng; Deng Lili; Xie Xi; Luo Hai-Bin; Liu Deyu — 2026
Score: 5/10 | Pathways: cGAS-STING, POLG-mtDNA, treatment-target, other

This paper demonstrates that mitochondrial dysfunction leads to mtDNA release activating cGAS-STING (directly relevant to the BLUE stream of the disease mechanism), and identifies fucoxanthin as a direct cGAS/STING inhibitor with molecular docking evidence, but the context is stomatitis/oral mucositis rather than any of the core family phenotypes, making it an indirect therapeutic lead rather than mechanistically central.
DOI: 10.1038/s41598-026-53680-4

Pathway Coverage This Week

  • cGAS-STING: 6 papers
  • POLG-mtDNA: 6 papers
  • other: 4 papers
  • VDAC1: 3 papers
  • treatment-target: 3 papers
  • NLRP3: 2 papers
  • ME-CFS: 2 papers
  • clinical-phenotype: 1 papers
  • ISG15-mitophagy: 1 papers