Derivation Web

source_632e18af9360488a

by researka:v2 · 2026-06-27 00:22:51.990593+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 longevity lifespan rates across 13 accepted source papers and 271 high-confidence extracted claims.", "type": "claim"}, {"id": "claim_3", "text": "The evidence profile contains no sources classified primarily as direct interventional hard-endpoint evidence, 9 adjacent clinical sources, and 4 mechanistic or model-system sources, with 0 cross-study disagreements across the evidence base.", "type": "claim"}, {"id": "claim_4", "text": "Positive study-level signals are summarized in the longevity outcome class, null signals in the contextual adjacent evidence, immune and inflammation outcome classes, and negative signals in no dominant 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 longevity lifespan rates remains a bounded geroscience case: 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-longevity_lifespan_rates-v06-DAILY-2026-06-17T04-55-05Z-R2`.", "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": "Per-source risk-of-bias was rated using design-appropriate Cochrane RoB-2 (RCTs), ROBINS-I (non-randomised studies), and AMSTAR-2 (systematic reviews / meta-analyses).", "type": "claim"}, {"id": "claim_9", "text": "Evidence-tension synthesis: claims grouped by outcome class (contextual adjacent evidence, immune and inflammation, longevity, skeletal, fracture, and bone); 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": "| Longevity Lifespan Rates / Contextual Adjacent Evidence | n=8; claims=122 | significant source statistic in 5/8 sources; receipt-level direction coded null | 4 indirect; 4 mechanistic | limited corpus depth in this outcome class |", "type": "claim"}, {"id": "claim_13", "text": "| Longevity Lifespan Rates / Immune and Inflammation | n=1; claims=27 | significant source statistic in 1/1 sources; receipt-level direction coded null | 1 indirect | single-source slice; hypothesis-generating |", "type": "claim"}, {"id": "claim_14", "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_15", "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_16", "text": "Contextual Adjacent Evidence remains a separate Results slice for Longevity Lifespan Rates (n=8; claims=122; significant source statistic in 5/8 sources; receipt-level direction coded null; 4 indirect; 4 mechanistic; limited corpus depth in this outcome class) and is not pooled into adjacent endpoint classes. Source-level findings are:", "type": "claim"}, {"id": "claim_17", "text": "Naaz 2024 (Curcumin Inhibits TORC1 and Prolongs the Lifespan of Cells with Mitochondrial Dysfunction; representative statistic p < 0.0001; source-level statistic reported; direction=null; directness=indirect; tier=B2).", "type": "claim"}, {"id": "claim_18", "text": "Munro 2019 (The exceptional longevity of the naked mole‐rat may be explained by mitochondrial antioxidant defenses; representative statistic p < 0.0001; source-level statistic reported; direction=null; directness=mechanistic; tier=C1).", "type": "claim"}, {"id": "claim_19", "text": "Direction reconciliation: receipt-level null or unclear coding is conservative claim-level coding. Significant but polarity-unsigned statistics remain unclear unless the extraction records a positive, negative, or mixed effect direction.", "type": "claim"}, {"id": "claim_20", "text": "The curated corpus does not contain a long-term, hard-outcome randomized mortality trial in non-diabetic older adults, and this absence is the most consequential scope limitation of the present synthesis. Several mechanistic and preclinical sources (e. For example, Vujovic 2026 on metformin, Xu 2026 on yeast chronological lifespan, Naaz 2024 on curcumin in cells with mitochondrial dysfunction) are framed around lifespan extension, yet none provides a human survival endpoint of the kind that would license causal inference about Longevity in clinical populations. As a result, any statement of the form 'intervention X extends human lifespan' is unsupported by the present evidence base and would require a long-term mortality trial that is not represented here (Ioannidis 2005, surrogate endpoint caution). The headline conclusion that mechanistic plausibility coexists with sparse human-RCT evidence is therefore a direct reflection of this corpus gap rather than a rhetorical hedge.", "type": "claim"}, {"id": "claim_21", "text": "Several interventions are supported only by mechanistic evidence for a clinically relevant claim: Vujovic 2026 articulates the molecular action of metformin but stops short of clinical mortality data, and the documented preclinical lifespan extension typically attributed to metformin in animal models (~5% per Anisimov 2008) is not matched by an equivalent human survival trial in this corpus.", "type": "claim"}, {"id": "claim_22", "text": "Additional corpus sources included animal/preclinical evidence; longevity remains a separate Results slice for Longevity Lifespan Rates (n=3; claims=54; significant source statistic in 1/3 sources; receipt-level direction coded unclear; 2 indirect; 1 review; limited corpus depth in this outcome class) and is not pooled into adjacent endpoint classes. Source-level findings are:", "type": "claim"}, {"id": "claim_23", "text": "Immune and Inflammation remains a separate Results slice for Longevity Lifespan Rates (n=1; claims=27; significant source statistic in 1/1 sources; receipt-level direction coded null; 1 indirect; single-source slice; hypothesis-generating) and is not pooled into adjacent endpoint classes. Source-level findings are:", "type": "claim"}, {"id": "claim_24", "text": "Hao 2026 (Host Oxidative Response Capacity Determines Longevity Outcomes of Microbial Interventions; representative statistic p < 0.0001; source-level statistic reported; direction=null; directness=indirect; tier=B2).", "type": "claim"}, {"id": "claim_25", "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_26", "text": "Until long-term, adequately powered human trials with mortality or hard functional endpoints are added to the evidence base, the Longevity case must be read as biologically suggestive but clinically unproven.", "type": "claim"}, {"id": "claim_27", "text": "The principal limitation is evidence-role imbalance. The retained corpus contains no sources classified primarily as direct clinical evidence, 9 adjacent clinical sources, and 4 mechanistic or model-system sources, which means causal interpretation depends on how much weight is assigned to each evidence tier.", "type": "claim"}, {"id": "claim_28", "text": "A second limitation is endpoint heterogeneity. Study-level signals span the longevity outcome class, the contextual adjacent evidence, immune and inflammation outcome classes, no dominant outcome class, and the contextual adjacent evidence outcome class; these domains cannot be pooled narratively without losing clinically relevant differences in measurement, population, and study design.", "type": "claim"}, {"id": "claim_29", "text": "For longevity lifespan rates, 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_30", "text": "This synthesis maps 13 included sources on Longevity across 4 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"}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1002/advs.202511813", "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": "Enhanced Selenium Supplement Extends Lifespan and Delays Multi‐Organs Aging by Regulating the Sik1 Pathway Through Maintaining Calcium Homeostasis", "type": "source", "url": "https://doi.org/10.1002/advs.202511813", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1007/s11357-024-01276-z", "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": "Developmental disruption of the mitochondrial fission gene drp-1 extends the longevity of daf-2 insulin/IGF-1 receptor mutant", "type": "source", "url": "https://doi.org/10.1007/s11357-024-01276-z", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1111/acel.70418", "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": "Host Oxidative Response Capacity Determines Longevity Outcomes of Microbial Interventions", "type": "source", "url": "https://doi.org/10.1111/acel.70418", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1242/dmm.052184", "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": "Decanoic acid extends lifespan and modulates metabolism in models of PLA2G6 -associated neurodegeneration", "type": "source", "url": "https://doi.org/10.1242/dmm.052184", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/cells13171470", "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": "Curcumin Inhibits TORC1 and Prolongs the Lifespan of Cells with Mitochondrial Dysfunction", "type": "source", "url": "https://doi.org/10.3390/cells13171470", "year": 2024}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1007/s10522-025-10278-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": "Bridging expectations and science: a roadmap for the future of longevity interventions", "type": "source", "url": "https://doi.org/10.1007/s10522-025-10278-z", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/biology14030279", "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": "Mitochondrial Proteome Reveals Metabolic Tuning by Restricted Insulin Signaling to Promote Longevity in Caenorhabditis elegans", "type": "source", "url": "https://doi.org/10.3390/biology14030279", "year": 2025}, {"comparator": "not extracted", "directness": "primary", "doi": "10.5937/jomb0-60849", "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": "Molecular mechanisms of metformin action: From metabolic effects to lifespan extension and healthspan promotion", "type": "source", "url": "https://doi.org/10.5937/jomb0-60849", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3390/ijms27062633", "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": "Yeast Chronological Lifespan Model as a Tool for Screening Aging Interventions", "type": "source", "url": "https://doi.org/10.3390/ijms27062633", "year": 2026}, {"comparator": "not extracted", "directness": "review-level", "doi": "10.1007/s10522-026-10456-7", "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": "Dendrobium officinale leaf extract extends the mean lifespan in Caenorhabditis elegans via the DAF-16/SOD-3 axis.", "type": "source", "url": "https://doi.org/10.1007/s10522-026-10456-7", "year": 2026}, {"comparator": "not extracted", "directness": "primary", "doi": "10.3389/fgene.2014.00211", "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": "Rec-8 dimorphism affects longevity, stress resistance and X-chromosome nondisjunction in C. elegans , and replicative lifespan in S. cerevisiae", "type": "source", "url": "https://doi.org/10.3389/fgene.2014.00211", "year": 2014}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1111/acel.12916", "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": "The exceptional longevity of the naked mole‐rat may be explained by mitochondrial antioxidant defenses", "type": "source", "url": "https://doi.org/10.1111/acel.12916", "year": 2019}, {"comparator": "not extracted", "directness": "primary", "doi": "10.1007/s13524-018-0755-7", "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": "A Cohort Comparison of Lifespan After Age 100 in Denmark and Sweden: Are Only the Oldest Getting Older?", "type": "source", "url": "https://doi.org/10.1007/s13524-018-0755-7", "year": 2019}, {"comparator": "not extracted", "directness": "citation", "doi": null, "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": "**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_15", "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_16", "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_17", "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_18", "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/gerona/glp012", "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": "Cesari 2009", "type": "source", "url": "https://doi.org/10.1093/gerona/glp012", "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": null, "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": "Anisimov 2008", "type": "source", "url": null, "year": null}, {"comparator": "not extracted", "directness": "citation", "doi": "10.1371/journal.pmed.0020124", "effect": "not extracted", "endpoint": "not extracted", "id": "source_22", "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": "6eba8bfc-d1b3-4094-a4b1-155f1a96a6a0", "screening": {"excluded": 0, "exclusion_reasons": ["No PRISMA full-text exclusion-stage filter was applied."], "flow": ["identified", "screened", "excluded_with_reasons", "included"], "identified": 13, "included": 13, "included_or_retained": 13, "screened": 13, "wording": "13 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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