Component

Urate / uric acid

Urate / uric acid. Species, exposure and limitations are retained in each linked claim.

9 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

Read recorded mechanisms Open recursive mind map

How nutrients influence it

Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.

How nutrients reach it in more than one step

Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.

Tracing routes…

What it does

Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.

Recorded relationships

What acts on it

  1. His1221Arg increased urate, superoxide and NO formation relative to wild type in xanthine-supplied assays.

    Human XDH p.His1221Arg → Urate / uric acid source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"}
    experimental_model
    Recombinant human XDH variants with urate, superoxide and NO assays
    exposure
    Xanthine, oxygen and inorganic nitrite assays
    limitations
    The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response.
    nutrient_topic
    Molybdenum research collection; topical membership is not evidence of a direct dietary effect. · Molybdenum
    organism
    Homo sapiens protein
    plain_language
    One variant raised several outputs at once.
    primary_references
    [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
    tissue_or_cell_type
    Purified human enzyme

    Molybdenum: cofactor assembly, sulfur metabolism and nutrient interactions (2026-09-17) · lines 807–818

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Recombinant human XDH variants with urate, superoxide and NO assays · source_derived_draft · unverified_draft

    ### mo-xor-h1221r His1221Arg increased urate, superoxide and NO formation relative to wild type in xanthine-supplied assays. Condition category: normal nutrient_topic: Molybdenum research collection; topical membership is not evidence of a direct dietary effect. plain_language: One variant raised several outputs at once. organism: Homo sapiens protein tissue_or_cell_type: Purified human enzyme experimental_model: Recombinant human XDH variants with urate, superoxide and NO assays limitations: The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response. exposure: Xanthine, oxygen and inorganic nitrite assays evidence_span: {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"} [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
    Complete structured claim and evidence

  2. Ile703Val increased urate and NO formation without increasing superoxide formation in the reported comparison.

    Human XDH p.Ile703Val → Urate / uric acid source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"}
    experimental_model
    Recombinant human XDH variants with urate, superoxide and NO assays
    exposure
    Xanthine, oxygen and inorganic nitrite assays
    limitations
    The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response.
    nutrient_topic
    Molybdenum research collection; topical membership is not evidence of a direct dietary effect. · Molybdenum
    organism
    Homo sapiens protein
    plain_language
    Another variant changed the balance of products differently.
    primary_references
    [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
    tissue_or_cell_type
    Purified human enzyme

    Molybdenum: cofactor assembly, sulfur metabolism and nutrient interactions (2026-09-17) · lines 820–831

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Recombinant human XDH variants with urate, superoxide and NO assays · source_derived_draft · unverified_draft

    ### mo-xor-i703v Ile703Val increased urate and NO formation without increasing superoxide formation in the reported comparison. Condition category: normal nutrient_topic: Molybdenum research collection; topical membership is not evidence of a direct dietary effect. plain_language: Another variant changed the balance of products differently. organism: Homo sapiens protein tissue_or_cell_type: Purified human enzyme experimental_model: Recombinant human XDH variants with urate, superoxide and NO assays limitations: The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response. exposure: Xanthine, oxygen and inorganic nitrite assays evidence_span: {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"} [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. Baseline reduced glutathione concentration and erythrocyte superoxide dismutase and catalase activities were higher in winter swimmers than in controls, which the authors interpret as an adaptive response to repeated oxidative stress and postulate as a mechanism of increased tolerance to environmental stress.

    Cold water immersion → Adaptation to repeated oxidative stress source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/cold-research/10396606.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b", "start_char": 0, "end_char": 1139, "text_sha256": "fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b"}
    experimental_model
    Winter swimmers compared with people who had never taken part, sampled for erythrocyte and plasma antioxidants
    exposure
    Habitual ice bathing
    limitations
    A cross-sectional comparison, so self-selection cannot be excluded. The authors frame it as adaptation to repeated oxidative stress.
    nutrient_topic
    Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. · Cold water immersion
    organism
    Human
    plain_language
    People who swim in ice water carry more antioxidant defence at rest.
    primary_references
    [cold-p10396606] Improved antioxidative protection in winter swimmers. (1999). https://pubmed.ncbi.nlm.nih.gov/10396606/ DOI: 10.1093/qjmed/92.4.193
    tissue_or_cell_type
    Erythrocytes and plasma

    Cold water immersion: cold sensing, heat production, the catecholamine axis and what repeated exposure changes (2026-09-19) · lines 689–700

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Winter swimmers compared with people who had never taken part, sampled for erythrocyte and plasma antioxidants · source_derived_draft · unverified_draft

    ### cold-winter-swimmer-antioxidants Baseline reduced glutathione concentration and erythrocyte superoxide dismutase and catalase activities were higher in winter swimmers than in controls, which the authors interpret as an adaptive response to repeated oxidative stress and postulate as a mechanism of increased tolerance to environmental stress. Condition category: normal nutrient_topic: Cold water immersion research collection; topical membership is not evidence of a direct clinical effect, and a therapeutic exposure is not a dietary intake. plain_language: People who swim in ice water carry more antioxidant defence at rest. organism: Human tissue_or_cell_type: Erythrocytes and plasma experimental_model: Winter swimmers compared with people who had never taken part, sampled for erythrocyte and plasma antioxidants limitations: A cross-sectional comparison, so self-selection cannot be excluded. The authors frame it as adaptation to repeated oxidative stress. exposure: Habitual ice bathing evidence_span: {"source_cache": "artifacts/cold-research/10396606.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b", "start_char": 0, "end_char": 1139, "text_sha256": "fdd2deec82fad8f9e148848c443d5b173ec42c0e07d9045c59773f7109883a7b"} [cold-p10396606] Improved antioxidative protection in winter swimmers. (1999). https://pubmed.ncbi.nlm.nih.gov/10396606/ DOI: 10.1093/qjmed/92.4.193
    Complete structured claim and evidence

  2. Allopurinol prevented the fructose-associated increase in 24-hour diastolic and daytime systolic/diastolic blood pressure.

    Allopurinol → Human ambulatory blood pressure during experimental fructose loading source_derived_draftungraded
    Experimental context and source evidence
    dose
    200 g fructose/day with or without allopurinol; drug dose not recovered in accessed abstract
    duration
    2 weeks
    evidence_access
    Primary abstract/metadata; unrecovered methods explicitly retained.
    evidence_scope
    literature_reviewed; source-specific curation
    experimental_model
    74 adult men in randomized fructose-loading intervention
    exposure_scope
    Isolated fructose / drug perturbation
    limitations
    Very high pure-fructose dose; allopurinol did not correct every outcome. Pharmacological rescue does not prove sole mediation by urate or justify treatment of ordinary HFCS intake.
    nutrient_topic
    HFCS chapter: actual formulation studies, component biochemistry and interventions are explicitly distinguished. · High-Fructose Corn Syrup / HFCS
    organism
    74 adult men in randomized fructose-loading intervention
    plain_language
    Allopurinol prevented the fructose-associated increase in 24-hour diastolic and daytime systolic/diastolic blood pressure.
    primary_references
    Excessive fructose intake induces the features of metabolic syndrome in healthy adult men: role of uric acid in the hypertensive response. (2010). https://pubmed.ncbi.nlm.nih.gov/20029377/ DOI: 10.1038/ijo.2009.259
    route
    Oral fructose and oral drug
    tissue
    Urate, ambulatory blood pressure and metabolic markers

    High-Fructose Corn Syrup: mechanism of action and metabolic impact (2026-09-20) · lines 545–555

    Original AI-assisted curation of twenty primary studies and official FDA composition information, with one reused canonical glucose-transport claim. Study-specific citations, negative findings and limitations retained. Not publisher full text. · supports · 74 adult men in randomized fructose-loading intervention · source_derived_draft · unverified_draft

    ## hfcs-allopurinol-bp Allopurinol prevented the fructose-associated increase in 24-hour diastolic and daytime systolic/diastolic blood pressure. Model/species: 74 adult men in randomized fructose-loading intervention Tissue: Urate, ambulatory blood pressure and metabolic markers Exposure: 200 g fructose/day with or without allopurinol; drug dose not recovered in accessed abstract Route: Oral fructose and oral drug Duration: 2 weeks Exposure scope: Isolated fructose / drug perturbation Limits: Very high pure-fructose dose; allopurinol did not correct every outcome. Pharmacological rescue does not prove sole mediation by urate or justify treatment of ordinary HFCS intake. Reference: Excessive fructose intake induces the features of metabolic syndrome in healthy adult men: role of uric acid in the hypertensive response. (2010). https://pubmed.ncbi.nlm.nih.gov/20029377/ DOI: 10.1038/ijo.2009.259 Access: Primary abstract/metadata; unrecovered methods explicitly retained.
    Complete structured claim and evidence

  3. Allopurinol lowered serum urate during the high-dose fructose intervention.

    Allopurinol → Human plasma urate concentration source_derived_draftungraded
    Experimental context and source evidence
    dose
    200 g fructose/day with or without allopurinol; drug dose not recovered in accessed abstract
    duration
    2 weeks
    evidence_access
    Primary abstract/metadata; unrecovered methods explicitly retained.
    evidence_scope
    literature_reviewed; source-specific curation
    experimental_model
    74 adult men in randomized fructose-loading intervention
    exposure_scope
    Isolated fructose / drug perturbation
    limitations
    Very high pure-fructose dose; allopurinol did not correct every outcome. Pharmacological rescue does not prove sole mediation by urate or justify treatment of ordinary HFCS intake.
    nutrient_topic
    HFCS chapter: actual formulation studies, component biochemistry and interventions are explicitly distinguished. · High-Fructose Corn Syrup / HFCS
    organism
    74 adult men in randomized fructose-loading intervention
    plain_language
    Allopurinol lowered serum urate during the high-dose fructose intervention.
    primary_references
    Excessive fructose intake induces the features of metabolic syndrome in healthy adult men: role of uric acid in the hypertensive response. (2010). https://pubmed.ncbi.nlm.nih.gov/20029377/ DOI: 10.1038/ijo.2009.259
    route
    Oral fructose and oral drug
    tissue
    Urate, ambulatory blood pressure and metabolic markers

    High-Fructose Corn Syrup: mechanism of action and metabolic impact (2026-09-20) · lines 533–543

    Original AI-assisted curation of twenty primary studies and official FDA composition information, with one reused canonical glucose-transport claim. Study-specific citations, negative findings and limitations retained. Not publisher full text. · supports · 74 adult men in randomized fructose-loading intervention · source_derived_draft · unverified_draft

    ## hfcs-allopurinol-urate Allopurinol lowered serum urate during the high-dose fructose intervention. Model/species: 74 adult men in randomized fructose-loading intervention Tissue: Urate, ambulatory blood pressure and metabolic markers Exposure: 200 g fructose/day with or without allopurinol; drug dose not recovered in accessed abstract Route: Oral fructose and oral drug Duration: 2 weeks Exposure scope: Isolated fructose / drug perturbation Limits: Very high pure-fructose dose; allopurinol did not correct every outcome. Pharmacological rescue does not prove sole mediation by urate or justify treatment of ordinary HFCS intake. Reference: Excessive fructose intake induces the features of metabolic syndrome in healthy adult men: role of uric acid in the hypertensive response. (2010). https://pubmed.ncbi.nlm.nih.gov/20029377/ DOI: 10.1038/ijo.2009.259 Access: Primary abstract/metadata; unrecovered methods explicitly retained.
    Complete structured claim and evidence

  4. Mean 24-hour urate increased with HFCS dose in the two-week study.

    HFCS-55 → Human plasma urate concentration source_derived_draftungraded
    Experimental context and source evidence
    dose
    HFCS-55 beverages at 0%, 10%, 17.5% or 25% energy requirement; 0% aspartame control
    duration
    Approximately 2 weeks
    evidence_access
    Primary abstract/metadata; unrecovered methods explicitly retained.
    evidence_scope
    literature_reviewed; source-specific curation
    experimental_model
    85 adults aged 18-40; nonrandomized double-blinded matched groups
    exposure_scope
    Direct HFCS-55 evidence
    limitations
    Short biomarker study; outpatient calories were not fixed and clinical cardiovascular events were not measured. NCT01103921 overlaps HFCS/control participants with the 2021 report.
    nutrient_topic
    HFCS chapter: actual formulation studies, component biochemistry and interventions are explicitly distinguished. · High-Fructose Corn Syrup / HFCS
    organism
    85 adults aged 18-40; nonrandomized double-blinded matched groups
    plain_language
    Mean 24-hour urate increased with HFCS dose in the two-week study.
    primary_references
    A dose-response study of consuming high-fructose corn syrup-sweetened beverages on lipid/lipoprotein risk factors for cardiovascular disease in young adults. (2015). https://pubmed.ncbi.nlm.nih.gov/25904601/ DOI: 10.3945/ajcn.114.100461
    route
    Oral beverages, with outpatient ad libitum diet and controlled inpatient meals
    tissue
    Circulating lipids and urate

    High-Fructose Corn Syrup: mechanism of action and metabolic impact (2026-09-20) · lines 305–315

    Original AI-assisted curation of twenty primary studies and official FDA composition information, with one reused canonical glucose-transport claim. Study-specific citations, negative findings and limitations retained. Not publisher full text. · supports · 85 adults aged 18-40; nonrandomized double-blinded matched groups · source_derived_draft · unverified_draft

    ## hfcs-dose-urate Mean 24-hour urate increased with HFCS dose in the two-week study. Model/species: 85 adults aged 18-40; nonrandomized double-blinded matched groups Tissue: Circulating lipids and urate Exposure: HFCS-55 beverages at 0%, 10%, 17.5% or 25% energy requirement; 0% aspartame control Route: Oral beverages, with outpatient ad libitum diet and controlled inpatient meals Duration: Approximately 2 weeks Exposure scope: Direct HFCS-55 evidence Limits: Short biomarker study; outpatient calories were not fixed and clinical cardiovascular events were not measured. NCT01103921 overlaps HFCS/control participants with the 2021 report. Reference: A dose-response study of consuming high-fructose corn syrup-sweetened beverages on lipid/lipoprotein risk factors for cardiovascular disease in young adults. (2015). https://pubmed.ncbi.nlm.nih.gov/25904601/ DOI: 10.3945/ajcn.114.100461 Access: Primary abstract/metadata; unrecovered methods explicitly retained.
    Complete structured claim and evidence

  5. Sucrose beverages increased 24-hour plasma urate exposure compared with aspartame.

    Sucrose → Human plasma urate concentration source_derived_draftungraded
    Experimental context and source evidence
    dose
    Sucrose or HFCS beverages at 25% of energy requirement versus aspartame, 3 servings/day
    duration
    16 days, approximately two weeks
    evidence_access
    Primary full-text methods/results and metadata inspected.
    evidence_scope
    literature_reviewed; source-specific curation
    experimental_model
    75 adults in nonrandomized double-blind matched groups; sucrose n=24, HFCS n=28, aspartame n=23
    exposure_scope
    Direct sucrose beverage comparison
    limitations
    Nonrandomized; paired MRI n=23 sucrose, 23 HFCS, 20 control. Outpatient calories not clamped; weight adjustment does not establish calorie independence. HFCS/control participants and some plasma outcomes overlap PMID 25904601. Short biomarkers are not clinical disease incidence.
    nutrient_topic
    Sucrose chapter; direct sucrose observations are distinguished from shared component metabolism. · Sucrose
    organism
    75 adults in nonrandomized double-blind matched groups; sucrose n=24, HFCS n=28, aspartame n=23
    plain_language
    Sucrose beverages increased 24-hour plasma urate exposure compared with aspartame.
    primary_references
    Consuming Sucrose- or HFCS-sweetened Beverages Increases Hepatic Lipid and Decreases Insulin Sensitivity in Adults. (2021). https://pubmed.ncbi.nlm.nih.gov/34265055/ DOI: 10.1210/clinem/dgab508
    route
    Oral beverages; outpatient usual diet, controlled inpatient meal substitutions
    tissue
    MRI liver fat, OGTT-derived insulin sensitivity and plasma markers

    Sucrose: mechanism of action and metabolic impact (2026-09-20) · lines 379–389

    Original AI-assisted source-specific sucrose curation with shared canonical claims retained by identity. Primary-study citations, negative findings, exposure details and limitations preserved. Not publisher full text. · supports · 75 adults in nonrandomized double-blind matched groups; sucrose n=24, HFCS n=28, aspartame n=23 · source_derived_draft · unverified_draft

    ## sucrose-urate Sucrose beverages increased 24-hour plasma urate exposure compared with aspartame. Model/species: 75 adults in nonrandomized double-blind matched groups; sucrose n=24, HFCS n=28, aspartame n=23 Tissue: MRI liver fat, OGTT-derived insulin sensitivity and plasma markers Exposure: Sucrose or HFCS beverages at 25% of energy requirement versus aspartame, 3 servings/day Route: Oral beverages; outpatient usual diet, controlled inpatient meal substitutions Duration: 16 days, approximately two weeks Exposure scope: Direct sucrose beverage comparison Limits: Nonrandomized; paired MRI n=23 sucrose, 23 HFCS, 20 control. Outpatient calories not clamped; weight adjustment does not establish calorie independence. HFCS/control participants and some plasma outcomes overlap PMID 25904601. Short biomarkers are not clinical disease incidence. Reference: Consuming Sucrose- or HFCS-sweetened Beverages Increases Hepatic Lipid and Decreases Insulin Sensitivity in Adults. (2021). https://pubmed.ncbi.nlm.nih.gov/34265055/ DOI: 10.1210/clinem/dgab508 Access: Primary full-text methods/results and metadata inspected.
    Complete structured claim and evidence

  6. MoCD-A and MoCD-B patients had elevated plasma/urinary S-sulfocysteine and xanthine, while urate stayed below reference ranges.

    Molybdenum cofactor / Moco → Combined sulfur and purine biomarker pattern in Moco deficiency source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_span
    {"source_cache": "artifacts/molybdenum-research/35192225.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "ab9083746ef775c196770d3f4d0208378f1796abf1d7056fe5b23f60421032d4", "start_char": 0, "end_char": 1812, "text_sha256": "ab9083746ef775c196770d3f4d0208378f1796abf1d7056fe5b23f60421032d4"}
    experimental_model
    Retrospective natural history in 58 patients; prospective biomarkers in 21 survivors
    exposure
    MoCD A:41; MoCD B:17
    limitations
    Severe inherited cofactor defects; not a prevalence study of ordinary nutritional deficiency or a validated population screening threshold.
    nutrient_topic
    Molybdenum research collection; topical membership is not evidence of a direct dietary effect. · Molybdenum
    organism
    Homo sapiens
    plain_language
    The combined pattern reflects failures in two cofactor-dependent pathways.
    primary_references
    [mo-p35192225] Molybdenum cofactor deficiency: A natural history. (2022). https://pubmed.ncbi.nlm.nih.gov/35192225/ DOI: 10.1002/jimd.12488
    tissue_or_cell_type
    Neurological course and plasma/urine
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Molybdenum: cofactor assembly, sulfur metabolism and nutrient interactions (2026-09-17) · lines 1158–1169

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Retrospective natural history in 58 patients; prospective biomarkers in 21 survivors · source_derived_draft · unverified_draft

    ### mo-mocd-biomarkers MoCD-A and MoCD-B patients had elevated plasma/urinary S-sulfocysteine and xanthine, while urate stayed below reference ranges. Condition category: machinery_impairment nutrient_topic: Molybdenum research collection; topical membership is not evidence of a direct dietary effect. plain_language: The combined pattern reflects failures in two cofactor-dependent pathways. organism: Homo sapiens tissue_or_cell_type: Neurological course and plasma/urine experimental_model: Retrospective natural history in 58 patients; prospective biomarkers in 21 survivors limitations: Severe inherited cofactor defects; not a prevalence study of ordinary nutritional deficiency or a validated population screening threshold. exposure: MoCD A:41; MoCD B:17 evidence_span: {"source_cache": "artifacts/molybdenum-research/35192225.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "ab9083746ef775c196770d3f4d0208378f1796abf1d7056fe5b23f60421032d4", "start_char": 0, "end_char": 1812, "text_sha256": "ab9083746ef775c196770d3f4d0208378f1796abf1d7056fe5b23f60421032d4"} [mo-p35192225] Molybdenum cofactor deficiency: A natural history. (2022). https://pubmed.ncbi.nlm.nih.gov/35192225/ DOI: 10.1002/jimd.12488
    Complete structured claim and evidence

  7. Recombinant human XDH/XOR catalyzed conversion of xanthine to urate.

    Human xanthine oxidoreductase / XDH → Xanthine source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"}
    experimental_model
    Recombinant human XDH variants with urate, superoxide and NO assays
    exposure
    Xanthine, oxygen and inorganic nitrite assays
    limitations
    The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response.
    nutrient_topic
    Molybdenum research collection; topical membership is not evidence of a direct dietary effect. · Molybdenum
    organism
    Homo sapiens protein
    plain_language
    The purine-breakdown pathway uses a molybdenum enzyme to make urate.
    primary_references
    [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
    tissue_or_cell_type
    Purified human enzyme

    Molybdenum: cofactor assembly, sulfur metabolism and nutrient interactions (2026-09-17) · lines 742–753

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Recombinant human XDH variants with urate, superoxide and NO assays · source_derived_draft · unverified_draft

    ### mo-xdh-xanthine Recombinant human XDH/XOR catalyzed conversion of xanthine to urate. Condition category: normal nutrient_topic: Molybdenum research collection; topical membership is not evidence of a direct dietary effect. plain_language: The purine-breakdown pathway uses a molybdenum enzyme to make urate. organism: Homo sapiens protein tissue_or_cell_type: Purified human enzyme experimental_model: Recombinant human XDH variants with urate, superoxide and NO assays limitations: The 2023 Fig. 6E corrigendum corrects a displayed panel; authors state data and conclusions are unchanged. Enzyme activity is not a clinical benefit or dietary response. exposure: Xanthine, oxygen and inorganic nitrite assays evidence_span: {"source_cache": "artifacts/molybdenum-research/37713777.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9", "start_char": 0, "end_char": 1655, "text_sha256": "30e93ea24784120403bef1dfe72cf46411f1af88946b9cc1cba3d4c45a367bf9"} [mo-p37713777] Natural mutations of human XDH promote the nitrite (NO2-)-reductase capacity of xanthine oxidoreductase: A novel mechanism to promote redox health? (2023). https://pubmed.ncbi.nlm.nih.gov/37713777/ DOI: 10.1016/j.redox.2023.102864
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