SAMHD1 Research Digest — 2026-07-05¶

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

Summary: 8 papers evaluated | 4 high-relevance (≥7) | 3 medium (5–6) | 1 low (3–4) | 0 scored <3

🔴 High Relevance (Score 7–10)¶

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Early brain-penetrant immunotherapy reverses interferon signature and improves motor outcome in a case of ADAR1-related Aicardi-Goutières syndrome. (from Pediatric Neurology / Neuroimmunology)
Dale Russell C; Hayes Jessica; Han Velda X; Dissanayake Ruwani; Lau Xianzhong — 2026
Score: 8/10 | Pathways: cGAS-STING, JAK-STAT, ISG15-mitophagy, AGS-spectrum, treatment-target, clinical-phenotype

This paper directly demonstrates reversal of the type I interferon signature (including downregulation of CGAS, SAMHD1, ISG15, and JAK1) by ruxolitinib + dexamethasone in an AGS interferonopathy, with single-cell RNA-seq validating the same core molecular players central to the SAMHD1 A565T disease mechanism, and provides a clinically actionable brain-penetrant JAK-inhibitor treatment precedent directly applicable to the interferon-driven neurodevelopmental and ME/CFS phenotypes in this family.
DOI: 10.1002/cti2.70113

JAK Inhibition in <i>PNPT1</i>-Related Mitochondrial Interferonopathy: A Case Report and Review of Mitochondrial-Immune Crosstalk. (from Pediatric neurology / mitochondrial medicine)
Brooks Dan Ross; Koh Hyun Yong; Kerrins Taylor Martin; Lang Steven; Bland Emily — 2026
Score: 8/10 | Pathways: cGAS-STING, JAK-STAT, AGS-spectrum, POLG-mtDNA, ISG15-mitophagy, treatment-target, clinical-phenotype

This case report directly demonstrates JAK inhibitor (tofacitinib) efficacy in a mitochondrial interferonopathy caused by mt-dsRNA cytosolic leakage activating IFN-I signaling—mechanistically parallel to the SAMHD1 A565T pathway where VDAC1 macropore releases mtDNA to activate cGAS-STING-IRF3-IFN-I-JAK-STAT, and provides clinical proof-of-concept that JAK inhibition can normalize IFN signature and downstream pathology (dystonia, lactate, transaminases) in mitochondrial-immune crosstalk syndromes including AGS-spectrum disease.
DOI: 10.1002/jmd2.70096

Aicardi-Goutières Syndrome: Insights from a Middle Eastern Case Series. (from Pediatric Neurology / Neuroradiology)
Alwalid Osamah; Al Subhi Marwa; Al Serhan Ala Aldeen; Abdulwahhab Saja B; Samran — 2026
Score: 7/10 | Pathways: AGS-spectrum, dNTPase, cGAS-STING, clinical-phenotype, JAK-STAT

This case series directly characterizes SAMHD1-associated AGS in a clinical cohort, including two siblings with a homozygous SAMHD1 variant presenting with chronic arthritis but no neurological disease—a phenotype highly relevant to understanding the genotype-phenotype spectrum of SAMHD1 variants and validating the arthritis/interferonopathy axis central to the family phenotype described.
DOI: 10.3174/ajnr.a9239

SLC30A9-mediated mitochondrial zinc homeostasis drives osteosarcoma chemoresistance by suppressing the mtDNA-cGAS-STING pathway. (from Oncology (osteosarcoma/cancer biology))
Li Hongyu; Yang Biao; Liu Yinliang; Yang Wen; Yu Haoye — 2026
Score: 7/10 | Pathways: cGAS-STING, VDAC1, POLG-mtDNA, treatment-target, other

This paper mechanistically demonstrates that mitochondrial dysfunction → mtDNA cytosolic release via mPTP opening → cGAS-STING activation, directly paralleling the BLUE stream (VDAC1/mtDNA/cGAS-STING axis) central to SAMHD1 haploinsufficiency pathology, and introduces a novel upstream regulator (mitochondrial zinc homeostasis via SLC30A9) of this pathway with therapeutic implications, though the context is osteosarcoma chemoresistance rather than interferonopathy.
DOI: 10.1016/j.lfs.2026.124555

🟡 Medium Relevance (Score 5–6)¶

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Myeloid STING restrains cardiac remodeling by suppressing macrophage amyloid precursor protein (from Cardiology)
Natarajan Niranjana; Johny Ebin; Sriram Varsha; Hara Mika; Antwi Praise Ama — 2026
Score: 6/10 | Pathways: cGAS-STING, VDAC1, POLG-mtDNA, other

This paper directly demonstrates mtDNA release activating cGAS-STING in cardiac macrophages and reveals a cardioprotective STING-MZF1-APP axis, which is mechanistically adjacent to the BLUE stream (VDAC1→mtDNA→cGAS→STING→IRF3) and relevant to the cardiology phenotype dimension of the disease profile, though the STING function here is tissue-protective rather than interferonopathic and SAMHD1 is not mentioned.
DOI: 10.64898/2026.07.01.735895

Daphnetin alleviates influenza pneumonia by enhancing chaperone-mediated autophagy of KEAP1 through Heat shock cognate 71 kDa protein. (from Pulmonology / natural product pharmacology)
Wang Jian; Liu Huan; Pan Xuanhao; Liu Tianyu; Li Qianyuan — 2026
Score: 6/10 | Pathways: cGAS-STING, POLG-mtDNA, mTOR-lysosomal, treatment-target, ME-CFS, other

This paper directly demonstrates that mtDNA leakage activates cGAS-STING inflammation in macrophages during viral pneumonia, and describes a therapeutic axis (HSC70-CMA-NRF2) that mitigates mitochondrial oxidative stress and mtDNA escape—mechanistically adjacent to the BLUE and RED streams of the SAMHD1 interferonopathy model—with potential relevance to the post-viral (ME/CFS) and cGAS-STING-driven IFN-I amplification loops, though SAMHD1, VDAC1, NLRP3, ISG15, or dNTP biology are not addressed.
DOI: 10.1016/j.phymed.2026.158517

Gut Microbiota-Derived TMAO Drives MC3T3-E1 Senescence and Osteogenic Dysfunction via cGAS-STING-NF-κB Signaling: Implications for Age-Related Bone Loss. (from Bone biology / osteoporosis / geriatrics)
Li Lingling; Li Xinsai; Jin Mingming; Zhang Yangyang; Bai Jia — 2026
Score: 5/10 | Pathways: cGAS-STING, VDAC1, POLG-mtDNA, other

This paper demonstrates that mtDNA cytosolic escape activates cGAS-STING-NF-κB to drive cellular senescence, directly implicating the BLUE-stream mechanism central to SAMHD1 haploinsufficiency pathology, but in an osteoblast/bone-loss context with no connection to SAMHD1, interferonopathy, or the family's specific phenotypes.
DOI: 10.1007/s00223-026-01567-x

🟢 Low Relevance (Score 3–4)¶

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The mitochondrial protease, LonP1, is a potential cardioprotective target for attenuating doxorubicin-induced cardiomyocyte death. (from Cardiology/Oncology)
O'Dwyer Kienan P; Bauer Perry E; Dziadowicz Sebastian A; Pal Subhankhi; Eminhize — 2026
Score: 4/10 | Pathways: POLG-mtDNA, cGAS-STING, VDAC1, clinical-phenotype, other

This paper addresses mtDNA release from damaged mitochondria activating inflammatory and apoptotic signaling (relevant to the BLUE/PURPLE streams via cytosolic mtDNA → cGAS-STING and VDAC1 macropore concepts), but the context is doxorubicin cardiotoxicity and LonP1 protease biology rather than SAMHD1 haploinsufficiency, interferonopathy, or any core family pathway, making the connection tangential despite mechanistic overlap in mtDNA leakage.
DOI: 10.1186/s12967-026-08537-9

Pathway Coverage This Week¶

cGAS-STING: 8 papers
POLG-mtDNA: 6 papers
other: 5 papers
treatment-target: 4 papers
clinical-phenotype: 4 papers
VDAC1: 4 papers
JAK-STAT: 3 papers
AGS-spectrum: 3 papers
ISG15-mitophagy: 2 papers
dNTPase: 1 papers
mTOR-lysosomal: 1 papers
ME-CFS: 1 papers