{ "protocol": { "version": "astra-four-model-unanimity-claude-opus-5-5-20261023-v1", "source": "https://eternalsearch.net/omega/opus-generated-confirmation-20261023/report.json", "sourceSha256": "2ad47f9ef43b45c90b0bf471d8d51ef888d6e7aee28445599c187857b4406d6f", "generator": "claude-opus-5-5", "design": "Preregistered rule recorded in the frozen cohort protocol before any forecast call for this cohort; the rule itself was chosen earlier after inspecting the Grok-generated votes. No laboratory validation", "reference": "Grok/N retrospective path on 2026-10-23: 240 input, 53 after Astra, 19 after unanimity, 14 of 19 article matches, 14 of 40 sensitivity", "endpoint": "At least two of three original judges assign article-correspondence score >=3", "handling": "unambiguous extracted saved responses", "first": "gpt-6-astra", "members": [ "claude-sonnet-5-5", "gpt-6-astra", "gemini-4-argon-high", "grok-4.5" ], "minVotes": 4, "cohort": "Fixed common complete-case cohort of the four predictors from the audited report; technical omissions remain exclusions", "coin": "Original saved tosses on identical hypothesis identities, without repeat tosses", "uncertainty": "Pointwise descriptive 95% paired original-task cluster percentile intervals; 2000 draws, seed20261022; no multiplicity correction", "workload": "One model/hypothesis forecast per unit; reuse the saved first-stage vote in the panel. Not actual request count, tokens, money or elapsed time" }, "first": "gpt-6-astra", "members": [ "claude-sonnet-5-5", "gpt-6-astra", "gemini-4-argon-high", "grok-4.5" ], "reused": true, "firstStage": { "hypotheses": 250, "questions": 50, "selected": 49, "matches": 21, "known": 45, "missed": 24, "counts": { "yes_true": 21, "yes_false": 28, "no_true": 24, "no_false": 177 }, "rates": { "ppv": 0.42857142857142855, "npv": 0.8805970149253731, "sens": 0.4666666666666667, "spec": 0.8634146341463415, "youden": 0.3300813008130081, "accuracy": 0.792, "balancedAccuracy": 0.6650406504065041 } }, "panelOnly": { "hypotheses": 250, "questions": 50, "selected": 22, "matches": 14, "known": 45, "missed": 31, "counts": { "yes_true": 14, "yes_false": 8, "no_true": 31, "no_false": 197 }, "rates": { "ppv": 0.6363636363636364, "npv": 0.8640350877192983, "sens": 0.3111111111111111, "spec": 0.9609756097560975, "youden": 0.27208672086720864, "accuracy": 0.844, "balancedAccuracy": 0.6360433604336043 } }, "final": 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"y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42808804", "id": "H1", "y": 1, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42808804", "id": "H2", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42808804", "id": "H3", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": true, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42808804", "id": "H4", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": true, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42808804", "id": "H5", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": true, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42585340", "id": "H1", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": false, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42585340", "id": "H2", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42585340", "id": "H3", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42585340", "id": "H4", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42585340", "id": "H5", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": true, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42669067", "id": "H1", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42669067", "id": "H2", "y": 1, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42669067", "id": "H3", "y": 1, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42669067", "id": "H4", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42669067", "id": "H5", "y": 1, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": true, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42811065", "id": "H1", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": true, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42811065", "id": "H2", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42811065", "id": "H3", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42811065", "id": "H4", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42811065", "id": "H5", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42841610", "id": "H1", "y": 1, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42841610", "id": "H2", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42841610", "id": "H3", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42841610", "id": "H4", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42841610", "id": "H5", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42806003", "id": "H1", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42806003", "id": "H2", "y": 1, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42806003", "id": "H3", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42806003", "id": "H4", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": true, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42806003", "id": "H5", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": true, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42806572", "id": "H1", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": false, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42806572", "id": "H2", "y": 1, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": true, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42806572", "id": "H3", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": true } }, { "task": "R42806572", "id": "H4", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42806572", "id": "H5", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42748238", "id": "H1", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42748238", "id": "H2", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42748238", "id": "H3", "y": 1, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": true, "gpt-6-astra": true, "gemini-4-argon-high": true, "grok-4.5": true } }, { "task": "R42748238", "id": "H4", "y": 0, "yes": false, "coin": false, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } }, { "task": "R42748238", "id": "H5", "y": 0, "yes": false, "coin": true, "forecasts": { "claude-sonnet-5-5": false, "gpt-6-astra": false, "gemini-4-argon-high": false, "grok-4.5": false } } ], "selected": [ { "task": "R42630044", "id": "H2", "index": 0, "question": "What mechanism limits the anabolic response of aged bone to mechanical loading, and can targeted stimulation restore this response?", "text": "Aged osteocytes lose mechanosensitivity because the stretch-activated cation channel PIEZO1 is downregulated in cortical bone, so load-induced calcium influx and downstream Wnt1/Wnt10b output collapse; pharmacological agonism of PIEZO1 (e.g. Yoda1) restores the anabolic response without mechanical loading. Mechanism: Reduced PIEZO1 expression/membrane availability in aged osteocytes lowers load-evoked Ca2+ transients, blunting NFAT/YAP-dependent induction of Wnt ligands and suppression of sclerostin, which shifts the formation/resorption balance toward resorption. Direct chemical gating of the residual channel pool bypasses the sensing deficit. Prediction: In aged mice, Yoda1 (or equivalent PIEZO1 agonist) increases cortical thickness and periosteal mineral apposition to a degree comparable with loading in young animals, and this effect is abolished in osteocyte-specific Piezo1 knockouts, whereas overcoming the deficit by increasing strain magnitude alone does not normalize Wnt1/Wnt10b induction.", "articleFinding": "In aged mouse bone, activation of Piezo1 during mechanical loading promotes its membrane co-localization with connexin 43 and increases connexin 43 hemichannel activity through PI3K-Akt signaling. Hemichannel opening increases PGE2 release, suppresses sclerostin, promotes endosteal bone formation, inhibits resorption, and thereby restores the cortical anabolic response to loading.", "doi": "10.1111/acel.70687", "pmid": "42630044", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42664348", "id": "H5", "index": 0, "question": "By what causal molecular mechanism does excess adiposity promote osteoarthritis progression, and can disrupting that mechanism reduce joint pathology?", "text": "Adipose tissue is a major source of a circulating complement-pathway protease that reaches synovial fluid and locally activates the alternative complement cascade on chondrocyte surfaces and damaged matrix, driving cartilage catabolism. Genetic or pharmacological interruption of this adipose-to-joint complement axis should reduce cartilage loss and synovitis in diet-induced obesity without requiring weight loss. Mechanism: Hypertrophic adipocytes secrete a rate-limiting complement activator; it enters the joint, amplifies C3/C5 convertase assembly on cartilage debris, generates C5a and the membrane attack complex sublytically on chondrocytes, which induces MMP-13/ADAMTS-5 and recruits C5aR1+ synovial macrophages. Prediction: Adipocyte-specific deletion of the secreted activator (or C5aR1 blockade) in obese mice reduces OARSI cartilage score and synovitis while body mass, fat mass and joint loading stay unchanged; parabiosis or serum transfer from obese wild-type mice restores pathology in the knockout, and the protection is lost in complement-deficient recipients.", "articleFinding": "Adipocyte-derived extracellular vesicles enriched in mitochondrial components transfer mitochondrial DNA to chondrocytes, where it activates cGAS-STING signaling and causes inflammation, metabolic dysfunction, senescence, and cartilage degeneration. Genetic or pharmacological inhibition of this pathway attenuates cartilage damage, pain behaviors, and gait abnormalities.", "doi": "10.1126/sciadv.aee6780", "pmid": "42664348", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 1 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42665751", "id": "H2", "index": 0, "question": "How does age-associated mitochondrial dysfunction initiate and propagate inflammatory signaling that causes ovarian functional decline?", "text": "Age-associated loss of mitochondrial DNA integrity in oocytes and granulosa cells causes release of mtDNA into the cytosol, which activates the cGAS–STING pathway and initiates type I interferon and NF-κB–driven inflammatory signaling within the follicle. This cell-intrinsic innate-immune activation, rather than infiltrating immune cells, is the initiating event of ovarian functional decline. Mechanism: Oxidative damage and reduced mitophagy in aged follicles permit mtDNA escape through BAX/BAK macropores and VDAC oligomers into the cytosol. Cytosolic mtDNA binds cGAS, generating cGAMP that activates STING, driving TBK1/IRF3 interferon output and NF-κB induction of IL-6, IL-1β and CXCL10. The resulting local inflammatory milieu impairs granulosa steroidogenesis and accelerates follicular atresia. Prediction: Oocyte- or granulosa-specific deletion of Cgas or Sting1, or pharmacological STING inhibition (H-151), in aged or mitochondrially stressed mice preserves follicle reserve, estradiol/AMH levels and fertility while leaving mtDNA copy number and oxidative damage unchanged — i.e. the mitochondrial lesion persists but the functional decline is prevented. Conversely, ovarian expression of a mitochondrial nuclease-resistant mtDNA-releasing mutant (e.g. TFAM haploinsufficiency) reproduces the decline, and it is rescued by STING loss.", "articleFinding": "Ageing-associated mitochondrial DNA leakage from oocytes activates oocyte cGAS, generating cGAMP that triggers STING signaling and passes through gap junctions to activate STING in surrounding granulosa cells. Genetic deletion of oocyte Cgas or pharmacological STING inhibition ameliorates inflammation and ovarian dysfunction, establishing this signaling axis as a causal driver of ovarian ageing.", "doi": "10.1038/s43587-026-01195-y", "pmid": "42665751", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 4 }, { "judge": "gemini-4-argon-medium", "score": 4 }, { "judge": "grok-4.7", "score": 4 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42689491", "id": "H3", "index": 1, "question": "Can in vivo correction of the HGPS-causing mutation rescue molecular, cellular, and structural defects in bone, and how does treatment timing affect efficacy?", "text": "Mutation correction before the onset of radiographically detectable skeletal disease will prevent bone pathology almost completely, whereas the identical intervention delivered after structural deficits are established will halt progression and partially rebuild bone but will not fully normalize geometry or strength. Efficacy will therefore show a threshold dependence on treatment age rather than a smooth linear decline. Mechanism: Early correction acts on a still-intact progenitor pool and an unremodeled matrix, so normal modeling can proceed. Once progerin has driven progenitor exhaustion/senescence and produced irreversibly altered cortical geometry and hypermineralized or collagen-cross-link-abnormal matrix, correction restores cell function but remodeling cannot re-sculpt macroscopic shape (e.g., clavicular and rib thinning, acro-osteolysis-like resorption) within the animal's lifespan. Prediction: Matched cohorts treated at a pre-symptomatic versus an established-disease age will show equal normalization of molecular markers (progerin levels, osteogenic gene expression) but divergent structural outcomes: near-complete rescue early, and in the late group restoration of dynamic bone formation rate with only partial recovery of cortical area and failure load.", "articleFinding": "Adenine base editing of the pathogenic LMNA variant reduced progerin expression, restored extracellular-matrix deposition and mineralization in progeroid osteoblasts, and partially rescued bone structure and physical properties in mice. In vivo correction was strongly age-dependent, with early postnatal delivery producing substantially greater editing and skeletal benefit than later treatment.", "doi": "10.1111/acel.70700", "pmid": "42689491", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 4 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42717261", "id": "H1", "index": 0, "question": "What mechanism induces pathogenic immune-cell senescence in ulcerative colitis, and does this senescence causally exacerbate the disease?", "text": "In ulcerative colitis, metabolic stress in mucosal T cells causes mitochondrial DNA to leak into the cytosol, activating the cGAS–STING pathway and driving these cells into a senescent, SASP-secreting state that worsens colitis. Blocking mtDNA release or STING signaling should prevent senescence and attenuate disease. Mechanism: Inflamed mucosal metabolic conditions damage mitochondria in lamina propria T cells; mitochondrial permeability transition/VDAC- or BAX/BAK-dependent pore formation releases mtDNA into the cytosol; cGAS detects it, STING–TBK1–IRF3/NF-κB signaling plus p53/p21 engagement enforces a stable cell-cycle arrest with a pro-inflammatory secretome (IL-6, IL-1β, TNF, chemokines) that recruits and activates neutrophils and macrophages, sustaining epithelial injury. Prediction: In colitis models, T-cell-specific deletion of Cgas or Sting1 (or mtDNA depletion/TFAM-dependent packaging rescue, or inhibition of the mPTP/VDAC oligomerization) reduces p16/p21-positive senescent mucosal T cells and SASP cytokines and lessens histological colitis, whereas deleting the same genes in epithelium or myeloid cells does not reproduce the senescence rescue; cytosolic mtDNA is measurable in sorted UC patient mucosal T cells and correlates with their senescence score.", "articleFinding": "NAD+ metabolic dysregulation causes mitochondrial dysfunction and cytosolic mitochondrial DNA leakage, activating cGAS-STING signaling to drive CD8+ T-cell senescence. These senescent cells exacerbate colitis, while systemic senolytic treatment reduces disease severity; their associated signature also predicts severe disease and non-response to biologic therapy.", "doi": "10.1111/acel.70706", "pmid": "42717261", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 4 }, { "judge": "gemini-4-argon-medium", "score": 4 }, { "judge": "grok-4.7", "score": 4 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42717261", "id": "H2", "index": 3, "question": "What mechanism induces pathogenic immune-cell senescence in ulcerative colitis, and does this senescence causally exacerbate the disease?", "text": "Senescent immune cells cause resistance to anti-inflammatory therapy in UC: their SASP maintains an inflammatory circuit that is not dependent on the single cytokine being blocked. Adding senescence-targeting treatment restores responsiveness. Mechanism: The SASP is multi-cytokine and self-reinforcing (IL-6/STAT3, IL-1β, TNF, chemokine-driven neutrophil recruitment, and local paracrine spread of senescence to neighboring immune and stromal cells). Blocking one node (TNF, IL-12/23, JAK partially) leaves the rest of the circuit intact, so inflammation persists; removing the senescent source collapses the whole circuit. Prediction: Pre-treatment mucosal senescence burden (p16/p21-high immune cells, SASP transcriptional signature) is higher in future non-responders to anti-TNF and stratifies response better than baseline CRP/histology; in a colitis model refractory to anti-TNF, combining anti-TNF with senolytics or a STING inhibitor restores remission whereas either alone does not.", "articleFinding": "NAD+ metabolic dysregulation causes mitochondrial dysfunction and cytosolic mitochondrial DNA leakage, activating cGAS-STING signaling to drive CD8+ T-cell senescence. These senescent cells exacerbate colitis, while systemic senolytic treatment reduces disease severity; their associated signature also predicts severe disease and non-response to biologic therapy.", "doi": "10.1111/acel.70706", "pmid": "42717261", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42717261", "id": "H3", "index": 1, "question": "What mechanism induces pathogenic immune-cell senescence in ulcerative colitis, and does this senescence causally exacerbate the disease?", "text": "Senescent immune cells are not bystanders but causal drivers of UC severity: their selective removal is sufficient to improve colitis. Senolytic clearance or genetic ablation of p16-high immune cells will reduce inflammation independently of any effect on epithelial cells. Mechanism: A small population of senescent mucosal lymphocytes/myeloid cells acts as a persistent inflammatory hub; because senescent cells are apoptosis-resistant (BCL-2/BCL-xL, PI3K–AKT survival dependence), they accumulate and continuously emit SASP factors that amplify local immune activation and block epithelial regeneration. Eliminating them removes the amplifier. Prediction: In INK-ATTAC/p16-3MR mice (or with dasatinib+quercetin/navitoclax), induced clearance of p16-positive cells after colitis onset lowers colonic SASP cytokines, restores crypt regeneration and reduces disease activity; adoptive transfer of in vitro-senesced T cells into recipients worsens colitis in a dose-dependent manner, while transfer of equal numbers of non-senescent cells does not.", "articleFinding": "NAD+ metabolic dysregulation causes mitochondrial dysfunction and cytosolic mitochondrial DNA leakage, activating cGAS-STING signaling to drive CD8+ T-cell senescence. These senescent cells exacerbate colitis, while systemic senolytic treatment reduces disease severity; their associated signature also predicts severe disease and non-response to biologic therapy.", "doi": "10.1111/acel.70706", "pmid": "42717261", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42723546", "id": "H5", "index": 0, "question": "Can a cell-free regenerative treatment alleviate UV-induced skin photoaging, and which causal intracellular mechanism mediates its protective effects?", "text": "Topical or intradermal application of a cell-free regenerative preparation (mesenchymal stromal cell-derived small extracellular vesicles / conditioned-medium secretome) alleviates UV-induced photoaging primarily by restoring mitophagy in keratinocytes and dermal fibroblasts. Restored PINK1/Parkin-dependent clearance of UV-damaged mitochondria prevents accumulation of depolarized organelles, thereby blocking senescence and sterile inflammation. Mechanism: UV irradiation depolarizes mitochondria and simultaneously blunts autophagic flux, so damaged mitochondria persist. The cell-free preparation delivers/induces PINK1 stabilization and Parkin recruitment, increasing LC3-II-tagged mitophagosome formation and lysosomal delivery; removal of dysfunctional mitochondria lowers mitochondrial ROS, preserves ATP, prevents p16/p21-driven senescence and reduces NF-kB-driven cytokine output, with secondary recovery of collagen I via reduced MMP-1/MMP-3. Prediction: Protection is abolished when mitophagy is blocked — in PINK1- or Parkin-silenced cells, or with Mdivi-1/bafilomycin or mito-QC/mt-Keima reporters showing no flux increase — while generic antioxidant capacity of the preparation is unchanged; conversely mitophagy inducers (urolithin A) reproduce the benefit. Alternatives predicting barrier-first or purely paracrine-growth-factor action would retain protection in PINK1-null skin.", "articleFinding": "Human umbilical cord mesenchymal stem cell secretome protects against UV-induced photoaging by enhancing mitophagy, which clears damaged mitochondria and reduces cytosolic mitochondrial DNA leakage. This suppresses cGAS-STING signaling and downstream inflammatory cytokines; mitophagy inhibition abolishes protection, while STING inhibition restores it.", "doi": "10.1111/acel.70701", "pmid": "42723546", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42725837", "id": "H2", "index": 0, "question": "Does the transmembrane protein investigated in this study causally regulate cellular senescence and age-related tissue pathology, and through what signaling mechanism?", "text": "The transmembrane protein acts as a cell-autonomous driver of senescence: its expression rises in aged and stressed tissue, and raising it is sufficient to push proliferating cells into a stable senescent arrest, while deleting it blocks senescence entry and reduces age-related tissue pathology. Mechanism: Stress-induced upregulation of the protein at the plasma membrane raises its local surface density, enabling ligand-independent clustering and constitutive assembly of an intracellular adaptor complex. The signal converges on NF-kB/p38 to sustain the SASP while p53-p21 and p16-Rb enforce the arrest, creating a feed-forward loop in which SASP cytokines further induce the protein. Prediction: Overexpression in young primary cells with intact p53 produces SA-beta-gal positivity, p21/p16 induction and SASP secretion without added stress, and conditional knockout in an aged or progeroid mouse lowers p16 burden and improves tissue histology and function; a signaling-dead point mutant that still reaches the membrane fails to do either, excluding mere protein-burden or ER-stress effects.", "articleFinding": "PTCHD4 promotes cellular senescence and age-associated tissue dysfunction by enhancing AKT signaling. PTCHD4 deficiency suppressed senescence, alleviated ageing-related phenotypes and bleomycin-induced pulmonary fibrosis in mice, and its anti-senescent effect was reversed by restoring AKT signaling.", "doi": "10.1111/acel.70711", "pmid": "42725837", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42736449", "id": "H2", "index": 0, "question": "Can an unannotated protein product that is altered in Alzheimer's disease causally regulate cellular function relevant to disease pathology?", "text": "A microprotein translated from a small ORF within a lncRNA or 5' uORF is depleted in Alzheimer's disease neurons, and this loss causally impairs mitochondrial respiration independently of any annotated protein at the same locus. Mechanism: The microprotein localizes to the inner mitochondrial membrane and stabilizes assembly of respiratory complex I/IV or ATP synthase dimers. Depletion lowers ATP output and raises mitochondrial ROS, which degrades synaptic maintenance in high-demand neurons. Prediction: CRISPR knockout of only the sORF start codon (leaving the host transcript and any overlapping annotated ORF intact) reduces oxygen consumption rate and complex activity in neurons, and re-expression of the microprotein cDNA from a separate locus rescues it; knockdown of the host lncRNA by itself does not reproduce the defect.", "articleFinding": "A small open reading frame at the MKKS locus encodes a 63-amino-acid microprotein that is the locus's predominant translation product and is downregulated in Alzheimer's disease. Experimental loss of this microprotein impairs mitochondrial respiration in microglia, supporting a causal role in microglial bioenergetics.", "doi": "10.1038/s43587-026-01207-x", "pmid": "42736449", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42749700", "id": "H2", "index": 1, "question": "What molecular mechanism links disrupted chromatin regulation to cellular senescence in Hutchinson–Gilford progeria syndrome, and can targeting that mechanism ameliorate disease phenotypes and extend lifespan?", "text": "Progerin-induced heterochromatin decompaction and nuclear-envelope rupture release genomic and mitochondrial DNA fragments into the cytosol, where cGAS–STING sensing produces the type-I-interferon arm of the SASP; STING loss or inhibition should uncouple nuclear damage from inflammation and improve HGPS phenotypes. Mechanism: Loss of lamin B1/heterochromatin tethering → micronuclei, cytoplasmic chromatin fragments and de-repressed LINE-1 retroelement cDNA → cGAS activation → STING–TBK1–IRF3 → IFN-β and NF-κB SASP → paracrine senescence in vasculature and adipose tissue. Prediction: Cytosolic dsDNA and ISG signatures (Ifit1, Isg15) are elevated in HGPS fibroblasts and G609G aorta and precede p16 induction; Sting1-null G609G mice or STING/TBK1 inhibitor treatment reduce SASP and vascular smooth-muscle loss and extend lifespan, while cGAS-independent DNA-damage signalling (ATM) remains unchanged — separating sensing from damage itself.", "articleFinding": "HMGA1 recruits the deubiquitinase USP7 to stabilize HP1β, which reduces chromatin accessibility at ANGPTL2 and suppresses senescence-associated secretory factors, thereby alleviating HGPS cellular senescence. An HMGA1-derived peptide, UHP, prevents HP1β degradation, reduces senescence, and significantly extends the lifespan of LmnaG609G/G609G mice.", "doi": "10.1038/s41467-026-76789-6", "pmid": "42749700", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42775698", "id": "H4", "index": 0, "question": "Can age-associated differences in the human gut microbial community causally reprogram intestinal barrier function, systemic metabolism, and mucosal gene expression, and what mediators contribute to these effects?", "text": "Transplantation of faecal microbiota from aged human donors into germ-free or antibiotic-depleted young mice is sufficient to cause reduced small-intestinal villus height and surface area, increased paracellular permeability, and a pro-inflammatory mucosal transcriptional programme, whereas microbiota from young donors does not. The effect is donor-age-driven rather than recipient-age-driven, establishing the aged community as an active cause rather than a consequence of host ageing. Mechanism: Age-associated communities are depleted of saccharolytic, butyrate-producing Firmicutes (Faecalibacterium, Roseburia, Eubacterium rectale) and enriched in Proteobacteria/Enterobacteriaceae and pathobionts. Loss of luminal butyrate removes the dominant colonocyte energy substrate and HDAC-inhibitory/HIF-1α-stabilising signal that maintains tight-junction (claudin-1, occludin, ZO-1) expression and epithelial oxygen consumption; the resulting epithelial oxygenation further expands facultative anaerobes, creating a feed-forward loop that degrades barrier integrity and drives NF-κB-dependent mucosal gene expression. Prediction: Recipients of aged-donor microbiota show lower caecal/portal butyrate, reduced claudin/occludin protein, elevated serum FITC-dextran or LPS-binding protein, and villus atrophy; oral tributyrin or butyrate supplementation (or co-colonisation with a butyrogenic consortium) in aged-donor recipients restores villus morphology, tight-junction expression and permeability to young-donor levels without changing overall community membership, while butyrate-receptor-deficient (Ffar2/Ffar3 or Hdac3^ΔIEC) recipients are refractory to that rescue.", "articleFinding": "Transplanting elderly-human gut microbiota into pigs caused reduced ileal villus height, loss of tight-junction proteins, altered plasma metabolites, and coordinated suppression of seven ileal mucosal antiviral-response hub genes compared with young-donor microbiota. The elderly-donor-associated metabolic shift was functionally linked to barrier impairment: Tyr-Phe increased epithelial electrical resistance, whereas prostaglandin E3 decreased it in IPEC-1 cells.", "doi": "10.1111/acel.70725", "pmid": "42775698", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42786310", "id": "H5", "index": 0, "question": "Can a commensal microorganism predicted from integrated human ageing profiles causally extend lifespan and healthspan and shift age-associated molecular and microbial states toward younger configurations?", "text": "A commensal bacterium nominated by multi-omic human ageing profiles (e.g. a Lactobacillus/Lactiplantibacillus- or Akkermansia-class strain whose relative abundance is high in biologically young individuals after adjusting for chronological age) causally extends median and maximum lifespan when colonised in gnotobiotic or conventional mice, and the effect requires live, metabolically active cells. Heat-killed or irradiated preparations of the same strain at matched dose produce no lifespan gain. Mechanism: Viable colonisation sustains continuous production of a secreted small-molecule or peptide effector in the gut lumen that signals to host enterocytes and the enteric immune compartment; killed cells deliver cell-wall ligands but no renewable effector flux, so downstream host signalling is not maintained. Prediction: Live-strain cohorts show a significant (>8%) median lifespan increase versus vehicle, while heat-killed cohorts overlap vehicle survival curves; the lifespan effect scales with faecal colonisation density/CFU and disappears in animals that fail to engraft.", "articleFinding": "Neisseria flavescens was identified as a candidate geroprotective commensal and experimentally shown to extend lifespan and healthspan in Caenorhabditis elegans when administered live. In aged mice, heat-killed N. flavescens shifted the serum metabolome, liver transcriptome and gut microbiome toward younger states, while isolated strains were confirmed to produce predicted beneficial metabolites.", "doi": "10.1038/s43587-026-01220-0", "pmid": "42786310", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 0 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42841227", "id": "H5", "index": 0, "question": "Do age-related changes in gut microbial metabolism causally impair antiviral defense during influenza infection, and through what host mechanism can this deficit be counteracted?", "text": "Ageing reduces gut microbial production of short-chain fatty acids (notably butyrate), and this loss causally impairs antiviral defense in the lung during influenza infection. Restoring butyrate signalling in the host — pharmacologically or by transferring a young/SCFA-producing microbiota — rescues antiviral protection in aged animals. Mechanism: Diminished abundance of fibre-fermenting commensals lowers luminal and systemic butyrate. Butyrate acts on haematopoietic precursors and lung-resident myeloid cells via GPR41/43 and HDAC inhibition, tuning the differentiation of monocytes into patrolling/antiviral phenotypes and limiting damaging neutrophil influx. Without it, aged mice generate excessive tissue-damaging inflammation with weaker type I/III interferon-dependent viral control, raising viral load and mortality. Prediction: Faecal transfer from young to aged mice, or oral butyrate/tributyrin supplementation starting before challenge, lowers lung viral titre and mortality in aged mice; the rescue is abolished in Ffar2/Ffar3-deficient hosts or by myeloid-specific blockade, and germ-free mice colonised with aged microbiota are protected by butyrate but not by fibre alone.", "articleFinding": "Age-associated gut microbiota dysbiosis reduces microbial acetate-production capacity during influenza infection, while acetate supplementation suppresses viral replication and inflammation in senescent human lung fibroblasts. This protection is associated with FFAR2/FFAR3 signaling and increased histone H3 acetylation, supporting acetate as a mechanistic mediator of the ageing gut–lung axis.", "doi": "10.1111/acel.70750", "pmid": "42841227", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42842666", "id": "H3", "index": 0, "question": "How do the different cellular compartments of the vascular wall causally contribute to distinct features of Hutchinson-Gilford progeria vascular pathology?", "text": "Smooth muscle cells are the primary driver of progeroid vascular degeneration, and progerin expression restricted to the smooth muscle layer is sufficient to reproduce medial cell loss, wall thinning and adverse remodelling even when endothelium, fibroblasts and immune cells carry no mutation. Conversely, sparing smooth muscle cells from progerin largely protects the vessel from this degenerative component. Mechanism: Progerin accumulates in the stiff, mechanically loaded medial smooth muscle compartment, where repeated contractile cycling and nuclear strain amplify lamina damage, DNA-damage signalling and mechanosensitive apoptosis; the resulting cell-autonomous attrition cannot be compensated because medial smooth muscle cells have very low replicative reserve. Prediction: In cell-type-restricted progerin models (or three-layer engineered vessels assembled from mutant versus isogenic corrected cells), smooth-muscle-only progerin yields the full medial depletion/wall-thinning phenotype, whereas endothelium-only or fibroblast-only progerin yields near-normal medial cellularity; mechanical unloading or reduced contractile cycling attenuates loss in the smooth-muscle-mutant condition.", "articleFinding": "In trilayer engineered blood vessels, HGPS fibroblasts causally promoted extracellular-matrix dysregulation and fibrotic signaling, while HGPS smooth muscle cells drove collagen accumulation and endothelial cells drove inflammation. Correcting the HGPS-associated mutation by base editing restored many pathological characteristics toward healthy levels.", "doi": "10.1126/sciadv.aeh3785", "pmid": "42842666", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42844664", "id": "H4", "index": 1, "question": "Through what causal mechanism does time-restricted feeding protect against accelerated cardiovascular ageing?", "text": "Time-restricted feeding protects arteries by suppressing NLRP3-inflammasome-driven gasdermin-D pore formation and pyroptosis in endothelial and perivascular myeloid cells; inflammasome activation is the necessary mediator of the accelerated vascular ageing that TRF prevents. Mechanism: The prolonged daily fast lowers postprandial glycemic excursions, lipotoxic DAMPs and mtROS, raises β-hydroxybutyrate (a direct NLRP3 inhibitor) and induces mitophagy, so ASC-speck assembly, caspase-1 activation and IL-1β/IL-18 release fall; less gasdermin-D pore formation preserves endothelial junction integrity, NO bioavailability and prevents the IL-1β→smooth-muscle osteogenic/fibrotic program that stiffens the wall. Prediction: TRF's protection of endothelium-dependent relaxation, pulse-wave velocity and cardiac remodeling is abolished (no further benefit) in Nlrp3−/−, Casp1−/− or Gsdmd−/− animals — i.e. TRF and inflammasome deletion are epistatic, not additive — and conversely constitutively active NLRP3 (Nlrp3^D301N) blocks TRF benefit despite unchanged feeding rhythm; vascular ASC specks and plasma IL-18 fall before any change in blood pressure.", "articleFinding": "Time-restricted feeding enriches acetate-producing Limosilactobacillus, and microbiota-derived acetate is necessary and sufficient for its protection against angiotensin II-induced cardiovascular ageing. Acetate activates GPR43, inhibits HDAC3, increases H4K8 acetylation, and suppresses NLRP3-mediated pyroptosis and cellular senescence.", "doi": "10.1111/acel.70728", "pmid": "42844664", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42853938", "id": "H3", "index": 0, "question": "What splicing-dependent mechanism enables resistance to CDK4/6 inhibition, and can disrupting it restore therapy-induced senescence?", "text": "Resistance to CDK4/6 inhibition is enabled by an aberrant splice isoform of a chromatin-modifying enzyme that loses its regulatory domain while retaining catalytic activity, and this isoform silences the senescence transcriptional program. Forcing expression of the full-length isoform, or blocking production of the truncated one, restores palbociclib-induced senescence. Mechanism: A splicing factor whose expression rises under prolonged CDK4/6 inhibition promotes use of an alternative exon/termination site in a histone methyltransferase or demethylase transcript. The resulting protein is mistargeted to CDKN1A/CDKN2A and SASP loci, where it deposits repressive marks that prevent the stable heterochromatin-plus-p21 state needed for arrest. Cells therefore resume cycling despite sustained RB-pathway inhibition. Prediction: Isoform-specific knockdown of the truncated transcript (antisense oligonucleotide or splice-switching ASO) with no change in total gene mRNA restores SA-β-gal positivity, p21 induction and durable arrest in resistant cells, while catalytically dead rescue of the truncated isoform does not; ChIP-seq shows loss of the repressive mark specifically at senescence loci.", "articleFinding": "Increased inclusion of exon 2 drives SUV39H2 overexpression and CDK4/6 inhibitor resistance. Suppressing SUV39H2 expression or methyltransferase activity removes H3K9me3 from enhancer regions, opens associated promoters, activates p21 and other senescence-associated genes, and restores therapy-induced senescence.", "doi": "10.1126/sciadv.aea2001", "pmid": "42853938", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42723144", "id": "H4", "index": 0, "question": "Can naturally occurring inherited genetic variation alter the rate of ovarian ageing on equivalent heterogeneous nuclear backgrounds, and what cellular mechanism mediates this effect?", "text": "Naturally occurring mitochondrial DNA (mtDNA) haplotype variation is sufficient to shift the rate of ovarian ageing when nuclear background is held equivalent (e.g. conplastic strains or reciprocal F1/outbred crosses sharing a heterogeneous nuclear genome but differing in maternally inherited mtDNA). The effect is mediated by haplotype-specific OXPHOS coupling efficiency in the oocyte–granulosa unit, which sets the rate at which the non-renewable primordial follicle pool is activated and lost. Mechanism: Non-synonymous and tRNA/rRNA variants distinguishing wild-derived mtDNA haplotypes alter complex I/III assembly and proton-leak-adjusted coupling efficiency. Lower coupling raises the ATP/ADP-sensing load on primordial oocytes, de-repressing the PI3K–AKT–FOXO3a/mTORC1 switch that holds follicles dormant, so a larger fraction of the reserve is recruited per cycle and atresia-driven depletion accelerates. The nuclear genome is permissive but not causal because it is identical in distribution across the compared groups. Prediction: At matched chronological age (e.g. 9–12 months), mtDNA-divergent animals on the same heterogeneous nuclear background differ ≥2-fold in primordial follicle counts and in age at cycle irregularity, with the direction predicted by oocyte respirometry (coupling efficiency measured in isolated cumulus–oocyte complexes) and by nuclear-pFOXO3a exit in primordial oocytes — while nuclear SNP association in the same cohort explains no additional variance. Cytoplasmic transfer or mitochondrial replacement reverses the phenotype; a nuclear-background-matched but mtDNA-identical control shows no difference.", "articleFinding": "The OKC-HETW mitochondrial haplotype accelerated ovarian ageing, causing faster primordial-follicle loss, inflammatory and fibrotic remodelling, mitochondrial dysfunction and impaired ovulation relative to the OKC-HETB haplotype on equivalently distributed nuclear backgrounds. Despite normal TFAM expression and elevated total TFAM protein, OKC-HETW ovaries had reduced mitochondrial TFAM, TFAM–mtDNA binding and TOMM20, supporting defective mitochondrial protein import and compromised mtDNA maintenance as the mechanism linking haplotype to accelerated decline.", "doi": "10.1111/acel.70710", "pmid": "42723144", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42808804", "id": "H3", "index": 0, "question": "What causal mechanism links cochlear ageing to loss of blood-labyrinth barrier integrity and auditory dysfunction?", "text": "Age-dependent loss of pericyte coverage in the cochlear stria vascularis is the primary causal event driving blood-labyrinth barrier (BLB) leakage and endocochlear potential decline. Pericyte dropout removes the paracrine signals that maintain endothelial tight junctions, so capillaries become permeable before hair cells die. Mechanism: Senescent/stressed cochlear pericytes detach and are lost, reducing pericyte-derived signalling (e.g. PDGFB–PDGFRB axis, angiopoietin-1/TIE2, TGF-beta) to strial endothelium. Endothelial tight-junction and adherens proteins (claudin-5, occludin, ZO-1, VE-cadherin) are downregulated and redistributed, transcytosis rises, plasma proteins and ions enter the intrastrial fluid space, K+ recycling by marginal cells fails and the endocochlear potential falls, raising auditory thresholds. Prediction: In aged animals, quantitative pericyte coverage of strial capillaries falls before measurable tracer leakage and before outer-hair-cell loss; conditional pericyte ablation in young animals reproduces leakage, endocochlear-potential drop and threshold shifts, while pericyte-targeted rescue (PDGF-BB or TIE2 agonism) restores claudin-5, barrier tightness and hearing in aged animals without changing hair-cell counts.", "articleFinding": "Age-dependent loss of IGF-1 lowers SLC25A33 expression in strial pericytes, causing mitochondrial reactive oxygen species accumulation and activation of TGF-β/Smad2 signaling. This drives pericyte phenotypic switching, disrupts blood-labyrinth barrier integrity, and worsens hearing loss, whereas IGF-1 supplementation or SLC25A33 overexpression suppresses the pathway and partially restores auditory function.", "doi": "10.1111/acel.70712", "pmid": "42808804", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42669067", "id": "H5", "index": 0, "question": "How does SIRT1 regulate L1 retrotransposon activity, and does this regulation affect cellular senescence?", "text": "SIRT1 is a direct repressor of L1 retrotransposons: it is recruited to L1 5'UTR promoter regions and deacetylates histone H4K16 (and H3K9/H3K56) there, maintaining a closed chromatin state. Loss or decline of SIRT1 during ageing de-represses L1 transcription, and this de-repression is itself sufficient to accelerate the onset of cellular senescence. Mechanism: SIRT1 occupies the L1 5'UTR, removes H4K16ac, and enables SUV39H1/HP1-dependent H3K9 methylation and heterochromatin compaction over young, full-length L1 loci. Reduced SIRT1 activity (lower NAD+, SIRT1 protein loss, or its known relocalization away from repeats after DNA damage) leaves H4K16ac high, opens the promoter, and allows RNA Pol II to transcribe L1, generating ORF1p/ORF2p and cytoplasmic L1 cDNA. Prediction: SIRT1 ChIP shows enrichment at L1 5'UTRs in proliferating cells that is lost in senescent cells; SIRT1 knockdown raises L1 5'UTR H4K16ac and L1 RNA/ORF1p and triggers premature senescence markers (SA-β-gal, p16, p21), while SIRT1 overexpression or a deacetylase-dependent rescue (not the H363Y catalytic mutant) restores silencing and delays senescence. Critically, blocking L1 downstream of SIRT1 loss — L1 ASOs, ORF2p-targeting shRNA, or reverse-transcriptase inhibitors such as lamivudine — prevents the senescence acceleration without restoring SIRT1 activity, placing L1 causally downstream.", "articleFinding": "SIRT1 suppresses L1 transcription and retrotransposition by promoting the association and recruitment of Lamin B1 and KAP1 at the L1 5′-UTR, increasing repressive H3K9me3 chromatin. SIRT1 deficiency derepresses L1, activates cGAS–STING signaling, and induces cellular senescence; reverse-transcriptase inhibition with 3TC rescues this phenotype.", "doi": "10.1111/acel.70689", "pmid": "42669067", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42806003", "id": "H5", "index": 0, "question": "What intercellular mechanism causes placental senescence during maternal ageing, and can disrupting this mechanism restore placental and offspring health?", "text": "Maternal ageing drives placental senescence through transfer of senescence-promoting signals from aged maternal decidual cells to fetal trophoblast across the maternal–fetal interface. Blocking this directional paracrine transfer in aged mothers prevents trophoblast senescence and restores fetal growth. Mechanism: Aged decidual stromal and immune cells acquire a SASP enriched in IL-6, IL-1β, CXCL ligands and TGF-β-family factors. These diffuse into the adjacent trophoblast layer, where receptor-driven NF-κB and p38 signalling induces p16/p21 and a secondary senescence programme — paracrine 'bystander' senescence spreading from the maternal to the fetal compartment. The senescent trophoblast loses nutrient-transport and endocrine capacity, causing growth restriction. Prediction: In aged-mother/young-decidua chimeric or decidua-specific interventions (e.g. decidual-restricted p16-INK-ATTAC clearance, or decidua-restricted IL-1R/IL-6R knockout), fetal trophoblast senescence markers and placental efficiency normalise, whereas the same intervention applied to trophoblast alone gives partial rescue. Spatial transcriptomics should show a senescence gradient decaying with distance from the decidual border, with maternal-compartment onset preceding fetal-compartment onset in time-course sampling.", "articleFinding": "Early inflammation and senescence-associated secretory phenotype activity induce IRF5-dependent CD38 expression in macrophages, which depletes NAD+ in decidual stromal cells and thereby promotes age-related placental senescence. Genetic or pharmacological disruption of this axis, including CD38 inhibition or NAD+ precursor treatment, reduces placental senescence, rescues intrauterine growth restriction, and improves offspring metabolic outcomes.", "doi": "10.1038/s41467-026-77217-5", "pmid": "42806003", "articleMatch": 0, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 2 }, { "judge": "gemini-4-argon-medium", "score": 2 }, { "judge": "grok-4.7", "score": 2 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] }, { "task": "R42748238", "id": "H3", "index": 0, "question": "What molecular mechanism causes age-related vascular deterioration to promote systemic senescence and shorten lifespan?", "text": "Aged endothelial cells lose a key metabolic enzyme that supplies a circulating NAD+ precursor to downstream tissues, so systemic NAD+ availability falls and senescence spreads organism-wide. Restoring the endothelial enzyme, or supplying the precursor, reverses systemic senescence and extends lifespan. Mechanism: Microvascular endothelium normally secretes an extracellular NAD+-biosynthetic enzyme (e.g., eNAMPT in extracellular vesicles) into plasma. Age-related endothelial dysfunction and capillary rarefaction reduce this secretion; parenchymal cells in muscle, brain, heart and kidney consequently cannot maintain NAD+ pools, sirtuin activity drops, mitochondrial and DNA-repair capacity fail, and cells enter a p16/p21 senescent state with SASP output that further damages the vasculature — a feed-forward loop. Prediction: Endothelial-specific knockout of the secreted enzyme in young mice lowers plasma precursor levels, drops NAD+ and raises senescence markers in distal non-vascular organs, and shortens lifespan; endothelial-specific overexpression (or precursor repletion) in aged mice restores distal-tissue NAD+, clears senescence and extends lifespan. Parenchymal-cell-specific knockout of the same enzyme does not reproduce the systemic phenotype, distinguishing a vascular-origin secreted factor from cell-autonomous metabolic decline.", "articleFinding": "Progressive activation of endothelial C/EBPβ induces AEP, which cleaves NAMPT and thereby causes systemic NAD+ depletion, vascular dysfunction, senescence, and reduced lifespan. Genetic disruption of AEP or expression of cleavage-resistant NAMPT N136A ameliorates these effects, while AEP inhibition or NMN supplementation alleviates age-related vascular decline.", "doi": "10.1126/sciadv.aed1961", "pmid": "42748238", "articleMatch": 1, "judgeScores": [ { "judge": "gpt-5.6-sol", "score": 3 }, { "judge": "gemini-4-argon-medium", "score": 3 }, { "judge": "grok-4.7", "score": 3 } ], "votes": [ { "model": "claude-sonnet-5-5", "yes": true }, { "model": "gpt-6-astra", "yes": true }, { "model": "gemini-4-argon-high", "yes": true }, { "model": "grok-4.5", "yes": true } ] } ] }