Derivation Web

source_01b9c9d8a31c4705

by researka:v2 · 2026-06-22 18:18:42.957633+04:00

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Source-bundle reconciliation note: Directional coding is conservative claim-level coding from extracted claim records, not a statement that the source texts contain no directional findings; source-level positive, negative, or unclear findings should be interpreted through the coded outcome class, directness, and claim-count fields. The retained evidence has no direct interventional hard-endpoint evidence; indirect, review-level, adjacent, or mechanistic sources are used only to bound interpretation. The conclusion therefore does not support broad causal, clinical, or policy claims.", "type": "claim"}, {"id": "claim_2", "text": "This paper synthesizes evidence on sirtuin biomarker effects across 14 included source papers and 551 high-confidence extracted claims.", "type": "claim"}, {"id": "claim_3", "text": "The evidence profile contains no sources classified primarily as direct interventional hard-endpoint evidence, 13 adjacent clinical sources, and 1 mechanistic or model-system source, with 0 cross-study disagreements across the evidence base.", "type": "claim"}, {"id": "claim_4", "text": "Positive study-level signals are summarized in the immune and inflammation outcome class; null signals are summarized in the contextual adjacent evidence, deficiency prevalence, and immune and inflammation outcome classes; negative signals are not the dominant direction in any outcome class; mixed or heterogeneous signals are summarized in the cardiometabolic outcome class. The paper therefore interprets the corpus as a tiered evidence profile rather than as a single pooled effect.", "type": "claim"}, {"id": "claim_5", "text": "The conclusion is that sirtuin biomarker effects should be treated as a bounded geroscience hypothesis: the retained clinical and adjacent evidence profile defines the scope for targeted testing, while mixed and null findings limit any unqualified anti-aging claim.", "type": "claim"}, {"id": "claim_6", "text": "This manuscript is reported as a Thin-corpus evidence brief. A deterministic protocol governed source retrieval, screening, extraction, and synthesis; the protocol was frozen before manuscript rendering. The full audit trail is in the supplementary `methods_pack.json` and the timestamped submission directory `synthesis-sirtuin_biomarker_effects-v06-DAILY-2026-06-21T20-00-39Z`.", "type": "claim"}, {"id": "claim_7", "text": "The following fields were extracted from each included source: study design, population / cohort, intervention or exposure, comparator, outcome class, effect direction, effect size, confidence interval or credible interval, p-value, sample size, follow-up duration, risk-of-bias rating. Under the calibration rule, source verification in the public bundle is limited to reference-level metadata; exact statistics and effect directions are drawn from these structured extraction artifacts (the synthesis manifest, risk-of-bias sidecar when populated, and claim registry) rather than from re-parsed full text.", "type": "claim"}, {"id": "claim_8", "text": "Risk-of-bias framework assignment follows study design (RoB-2 for RCTs, ROBINS-I for non-randomised studies, AMSTAR-2 for systematic reviews / meta-analyses). Public appraisal claims are limited to populated `risk_of_bias.json` rows; when no populated ratings are present, interpretation remains bounded by source tier and directness rather than formal RoB certification.", "type": "claim"}, {"id": "claim_9", "text": "Evidence-tension synthesis: claims grouped by outcome class (cardiometabolic, contextual adjacent evidence, deficiency prevalence, immune and inflammation, immune and inflammation); within-class agreement, disagreement, and directness gaps surfaced explicitly. Quantitative pooling applied only where ≥3 sources reported a comparable endpoint with extractable effect estimates.", "type": "claim"}, {"id": "claim_10", "text": "Source retrieval, claim extraction, evidence routing, and prose drafting were assisted by large language models under a deterministic audit-trail protocol. Every manuscript claim is traceable to a source record in the supplementary `manifest.json`. Final eligibility and interpretation decisions are author-verified.", "type": "claim"}, {"id": "claim_11", "text": "| Evidence domain | Corpus slice | Strongest signal | Directness | Main limitation |", "type": "claim"}, {"id": "claim_12", "text": "| Contextual Adjacent Evidence | n=8; claims=226 | no extracted directional signal in 8/8 sources | 7 indirect; 1 review | limited corpus depth in this outcome class |", "type": "claim"}, {"id": "claim_13", "text": "Outcome-class note:** Contextual Adjacent Evidence denotes background, boundary-condition, or adjacent-outcome sources. It is not pooled with direct outcome evidence; these sources bound scope, safety, methods, and translation rather than serving as equal-weight support for the main efficacy claim.", "type": "claim"}, {"id": "claim_14", "text": "This evidence brief reports outcome packets as a map of retained evidence rather than as a full journal Results narrative or pooled effect estimate.", "type": "claim"}, {"id": "claim_15", "text": "8 included sources were assigned to this outcome class. Directional coding: null=8. Directness coding: indirect=7, review=1.", "type": "claim"}, {"id": "claim_16", "text": "3 included sources were assigned to this outcome class. Directional coding: null=1, unclear=2. Directness coding: indirect=3.", "type": "claim"}, {"id": "claim_17", "text": "1 included source were assigned to this outcome class. Directional coding: null=1. Directness coding: indirect=1.", "type": "claim"}, {"id": "claim_18", "text": "1 included source were assigned to this outcome class. Directional coding: null=1. Directness coding: indirect=1.", "type": "claim"}, {"id": "claim_19", "text": "Evidence for this outcome class is represented in the structured results table, but the retained narrative paragraphs were more strongly assigned to adjacent outcome classes. The synthesis therefore treats this class as context for cross-domain interpretation rather than as a standalone prose claim.", "type": "claim"}, {"id": "claim_20", "text": "Verification note:** Reference-only or no-abstract records are treated as verification-limited context, not as equal-weight support for the main claim.", "type": "claim"}, {"id": "claim_21", "text": "The curated corpus for Sirtuin is dominated by observational cohort designs and preclinical experiments rather than long-term randomized trials in clinically-relevant populations. There is no long-term mortality trial in this corpus, no diabetes-prevention RCT, and no geriatric functional-outcome trial anchored to canonical thresholds such as the 0.8 m/s gait-speed cutoff (Studenski 2011) or the EWGSOP2 grip-strength cutoffs of 27 kg for men and 16 kg for women (Cruz-Jentoft 2019). Consequently, the headline characterization of sirtuin biomarkers as a 'context-dependent' signal rests on indirect, indirect, and mechanistic evidence rather than on hard-outcome RCT confirmation.", "type": "claim"}, {"id": "claim_22", "text": "Several outcome classes in the corpus are supported by only a single source, which means within-corpus replication is not possible. Because each of these outcome classes depends on one study's design choices, dosing, and population, the synthesis cannot distinguish a true null from a study-specific or measurement-specific null, and the boundary conditions of any effect remain undefined.", "type": "claim"}, {"id": "claim_23", "text": "Endpoint scope is a second-order limitation. It does not measure hard clinical endpoints: no mortality, no incident disability, no fracture, no hospitalization, and no adjudicated cardiovascular event. The Ioannidis 2005 caution that surrogate associations do not guarantee hard-outcome validity applies directly: the sirtuin-biomarker-to-clinical-outcome inferential chain is unbridged in this corpus, and any claim that sirtuin modulation 'works' in humans is unsupported by the sources on hand.", "type": "claim"}, {"id": "claim_24", "text": "Finally, the corpus carries a mechanism-to-clinic gap that is structural rather than incidental. The preclinical and in-vitro sources (Cao 2022 NR gavage at 400 mg/kg/day in mice; Ding 2021 multiple-myeloma cell lines; Fu 2022 cisplatin-nephrotoxicity murine model at 8 mg/kg/week; Tsai 2021 pancreatic adenocarcinoma models with 125 mg/kg luciferin; Patyal 2024 SIRT1-v1 transfection in n = 3) supply the dominant mechanistic plausibility, while the human evidence (Wasserfurth 2021, Hwang 2020, Biscetti 2024, Sayedyousef 2025, Moin 2026, Nyarady 2020, Gonzalez-Fernandez 2019, Nowak-Szwed 2025) is almost entirely indirect, with directness flagged as 'indirect' on every source that reports it. There is no source in the corpus that traces a chain from a defined sirtuin intervention in a non-diabetic adult to a hard clinical endpoint, and the only review-design source (Moin 2026) is a meta-analysis of SIRT1 polymorphisms in diabetic nephropathy rather than of sirtuin pharmacodynamics. The synthesis therefore cannot answer whether sirtuin biomarker changes are causes, consequences, or epiphenomena of the cardiometabolic, immune, and periodontal processes the sources describe.", "type": "claim"}, {"id": "claim_25", "text": "For sirtuin biomarker effects, the final interpretation is deliberately tiered: the retained clinical and adjacent evidence profile defines a bounded geroscience rationale, but the corpus does not support treating mechanistic target engagement, intermediate biomarkers, and patient-relevant outcomes as interchangeable evidence. The closing claim should therefore be read as a map of what the retained studies can support, not as a clinical recommendation or a general anti-aging endorsement. Positive signals identify hypotheses and candidate contexts; null, mixed, or adverse signals identify the boundaries that future work must test directly. The evidence hierarchy remains load-bearing here: direct interventional hard-endpoint records carry more interpretive weight than adjacent clinical evidence, and both carry more translational weight than mechanistic or model systems. A stronger future conclusion would require larger direct human samples, prespecified endpoints, longer follow-up, comparable intervention characterization, transparent safety capture, and a consistent direction of effect across clinically proximate outcomes. Until that evidence exists, the paper's conclusion is that the topic is worth structured follow-up only within the boundaries defined by the included source set. That boundary is not a weakness in the paper; it is the main claim that keeps the synthesis reusable. Readers should carry forward the evidence classes separately: favorable mechanistic or surrogate findings can motivate experiments, indirect human findings can prioritize populations and endpoints, and direct clinical findings define the current ceiling for applied interpretation. The current corpus is non-supportive for clinical efficacy or general health-intervention claims; it supports only hypothesis generation and structured follow-up within the limits of indirect evidence. Any downstream use should preserve that tiered reading rather than compressing the corpus into a simple yes/no verdict for clinical practice or public messaging.", "type": "claim"}, {"id": "claim_26", "text": "This synthesis maps 14 included sources on Sirtuin Biomarker Effects across 5 outcome classes with no cross-study disagreements surfaced. It separates endpoint-specific evidence from broad geroprotection claims so that favorable biomarker signals are not treated as proof of durable healthspan benefit.", "type": "claim"}, {"id": "claim_27", "text": "Across 14 curated reference papers, the evidence base for Sirtuin shows a context-dependent profile. Positive signals appear in: immune. Null findings dominate: contextual other, immune inflammation. The Sirtuin anti-aging case as currently constituted is incomplete: mechanistic plausibility coexists with mixed or sparse human-RCT evidence, and the boundary conditions remain to be established.", "type": "claim"}, {"id": "claim_28", "text": "This synthesis adds a design-level evidence-weighting layer and an explicit cross-study disagreement map, keeping boundary conditions visible instead of averaging them away in narrative summary.", "type": "claim"}, {"id": "claim_29", "text": "| Evidence domain | Direct sources | Indirect / mechanism sources | Direction profile | Interpretation boundary |", "type": "claim"}, {"id": "claim_30", "text": "| cardiometabolic | 0 | 3 | null, unclear | direct interventional hard-endpoint gap |", "type": "claim"}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1186/s12933-025-03013-y", "effect": "not extracted", "endpoint": "not extracted", "id": "source_1", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Sirtuins and regulatory miRNAs as epigenetic determinants of empagliflozin-mediated recovery after acute myocardial infarction", "type": "source", "url": "https://doi.org/10.1186/s12933-025-03013-y", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1038/s41392-022-01257-8", "effect": "not extracted", "endpoint": "not extracted", "id": "source_2", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "The sirtuin family in health and disease", "type": "source", "url": "https://doi.org/10.1038/s41392-022-01257-8", "year": 2022}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/nu13113824", "effect": "not extracted", "endpoint": "not extracted", "id": "source_3", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Impact of Dietary Modifications on Plasma Sirtuins 1, 3 and 5 in Older Overweight Individuals Undergoing 12-Weeks of Circuit Training", "type": "source", "url": "https://doi.org/10.3390/nu13113824", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fimmu.2022.925738", "effect": "not extracted", "endpoint": "not extracted", "id": "source_4", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "p53/sirtuin 1/NF-κB Signaling Axis in Chronic Inflammation and Maladaptive Kidney Repair After Cisplatin Nephrotoxicity", "type": "source", "url": "https://doi.org/10.3389/fimmu.2022.925738", "year": 2022}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/biom10101414", "effect": "not extracted", "endpoint": "not extracted", "id": "source_5", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Changes in the Systemic Expression of Sirtuin-1 and Oxidative Stress after Intravitreal Anti-Vascular Endothelial Growth Factor in Patients with Retinal Vein Occlusion", "type": "source", "url": "https://doi.org/10.3390/biom10101414", "year": 2020}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1186/s12903-025-06690-z", "effect": "not extracted", "endpoint": "not extracted", "id": "source_6", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Taurine, Sirtuin-1 and TNF- α levels in different aged adults with periodontitis: a pilot study", "type": "source", "url": "https://doi.org/10.1186/s12903-025-06690-z", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/antiox11040706", "effect": "not extracted", "endpoint": "not extracted", "id": "source_7", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Sirtuin 3 Dependent and Independent Effects of NAD + to Suppress Vascular Inflammation and Improve Endothelial Function in Mice", "type": "source", "url": "https://doi.org/10.3390/antiox11040706", "year": 2022}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1155/jdr/5528647", "effect": "not extracted", "endpoint": "not extracted", "id": "source_8", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Deciphering the Role of Sirtuin‐1 Gene Polymorphism in Diabetic Nephropathy: A Systematic Review and Meta‐Analysis", "type": "source", "url": "https://doi.org/10.1155/jdr/5528647", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3892/mmr.2021.12400", "effect": "not extracted", "endpoint": "not extracted", "id": "source_9", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Sirtuin 2 knockdown inhibits cell proliferation and RAS/ERK signaling, and promotes cell apoptosis and cell cycle arrest in multiple myeloma", "type": "source", "url": "https://doi.org/10.3892/mmr.2021.12400", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/cimb46080522", "effect": "not extracted", "endpoint": "not extracted", "id": "source_10", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "The Role of Sirtuin-1 Isoforms in Regulating Mitochondrial Function", "type": "source", "url": "https://doi.org/10.3390/cimb46080522", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1038/s12276-021-00687-8", "effect": "not extracted", "endpoint": "not extracted", "id": "source_11", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Upregulating sirtuin 6 ameliorates glycolysis, EMT and distant metastasis of pancreatic adenocarcinoma with krüppel-like factor 10 deficiency", "type": "source", "url": "https://doi.org/10.1038/s12276-021-00687-8", "year": 2021}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1186/s13006-020-00301-z", "effect": "not extracted", "endpoint": "not extracted", "id": "source_12", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Effects of perinatal factors on sirtuin 3, 8-hydroxy-2′- deoxyguanosine, brain-derived neurotrophic factor and serotonin in cord blood and early breast milk: an observational study", "type": "source", "url": "https://doi.org/10.1186/s13006-020-00301-z", "year": 2020}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1038/s41598-024-78576-z", "effect": "not extracted", "endpoint": "not extracted", "id": "source_13", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Evaluation of sirtuin 1 as a predictor of cardiovascular outcomes in diabetic patients with limb-threatening ischemia", "type": "source", "url": "https://doi.org/10.1038/s41598-024-78576-z", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/ijms21010295", "effect": "not extracted", "endpoint": "not extracted", "id": "source_14", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Granulosa-Lutein Cell Sirtuin Gene Expression Profiles Differ between Normal Donors and Infertile Women", "type": "source", "url": "https://doi.org/10.3390/ijms21010295", "year": 2019}, {"comparator": "not extracted", "directness": "citation", "doi": null, "effect": "not extracted", "endpoint": "not extracted", "id": "source_15", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "**Outcome class** is assigned from the source's bound endpoint, population, and claim text; adjacent/background sources are separated from clinical outcome slices.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": null, "effect": "not extracted", "endpoint": "not extracted", "id": "source_16", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "**Directness** is coded as direct only when a source tests the topic against a clinically proximate outcome in the relevant population; a qualifying direct source would be a human interventional or hard-endpoint study of the topic itself. Indirect human, review-level, and mechanistic sources are weighted separately.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": null, "effect": "not extracted", "endpoint": "not extracted", "id": "source_17", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "**Directional signal** is counted within the assigned outcome class only. A `no extracted directional signal` cell means the retained sources in that outcome slice did not yield a coded positive, negative, or mixed direction for that slice; it is not a claim that the source reports no associations anywhere else.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": null, "effect": "not extracted", "endpoint": "not extracted", "id": "source_18", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "**Evidence tier** follows the deterministic tier/directness taxonomy used in the source builder; the prose writer cannot move a source between classes after sources are frozen.", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1001/jama.2010.1923", "effect": "not extracted", "endpoint": "not extracted", "id": "source_19", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Studenski 2011", "type": "source", "url": "https://doi.org/10.1001/jama.2010.1923", "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1093/ageing/afy169", "effect": "not extracted", "endpoint": "not extracted", "id": "source_20", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Cruz-Jentoft 2019", "type": "source", "url": "https://doi.org/10.1093/ageing/afy169", "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1371/journal.pmed.0020124", "effect": "not extracted", "endpoint": "not extracted", "id": "source_21", "intervention_or_exposure": "not extracted", "population": "not extracted", "risk_of_bias": "not appraised in public sidecar", "study": "Ioannidis 2005", "type": "source", "url": "https://doi.org/10.1371/journal.pmed.0020124", "year": null}], "publication_id": "1c0cf558-f04c-47e1-912b-a4da95e9a2f6", "screening": {"excluded": 0, "exclusion_reasons": ["No PRISMA full-text exclusion-stage filter was applied."], "flow": ["identified", "screened", "excluded_with_reasons", "included"], "identified": 14, "included": 14, "included_or_retained": 14, "screened": 14, "wording": "14 candidate receipts retained after source retrieval, deduplication, and topic filtering. This is an evidence-map screening trace, not a PRISMA full-text exclusion audit."}}

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