{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T16:51:55Z","timestamp":1793119915818,"version":"4.5.0"},"reference-count":54,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2025,1,19]],"date-time":"2025-01-19T00:00:00Z","timestamp":1737244800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["75N2019D00033"],"award-info":[{"award-number":["75N2019D00033"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["HHSN2682011"],"award-info":[{"award-number":["HHSN2682011"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL133049"],"award-info":[{"award-number":["R01HL133049"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL146442"],"award-info":[{"award-number":["R01HL146442"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL148151"],"award-info":[{"award-number":["R01HL148151"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000050","name":"National Heart, Lung, and Blood Institute","doi-asserted-by":"publisher","award":["R01HL149714"],"award-info":[{"award-number":["R01HL149714"]}],"id":[{"id":"10.13039\/100000050","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Transfusion"],"published-print":{"date-parts":[[2025,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Storage of packed red blood cells (RBCs) for transfusion leads to biochemical and morphological changes, increasing hemolysis risk. Urate levels in blood bags at donation contribute to the molecular heterogeneity and hemolytic propensity of stored RBCs. However, studies to date have been underpowered to investigate at scale the contribution of donor demographics and genetics to the heterogeneity in urate levels across donations.<\/jats:p><\/jats:sec><jats:sec><jats:title>Study Design and Methods<\/jats:title><jats:p>Urate levels were measured in 13,091 RBC units from the REDS study. Characteristics tested included hemolysis parameters (spontaneous, osmotic, oxidative) at storage end and post\u2010transfusion hemoglobin (Hb) increments in recipients. Donor demographics, urate levels, and genetic variants were analyzed for associations with these outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Elevated urate levels were linked to male sex, older age, high BMI, and Asian descent. Units with high urate levels exhibited increased spontaneous and osmotic hemolysis, while oxidative hemolysis was unaffected. Genetic variants in SLC2A9 (V282I) and ABCG2 (Q141K) were strongly associated with elevated urate, particularly in Asian donors. Post\u2010transfusion analyses revealed that units from female donors carrying these variants were associated with reduced Hb increments, with up to a 31% reduction in efficacy. This effect was not observed in male donors.<\/jats:p><\/jats:sec><jats:sec><jats:title>Discussion<\/jats:title><jats:p>RBC urate levels and genetic traits significantly impact storage quality and transfusion outcomes. These findings highlight the importance of donor molecular characteristics for optimizing transfusion strategies. Moreover, genetic and metabolic insights may inform donor recruitment efforts, providing health feedback to volunteers while ensuring effective transfusion products.<\/jats:p><\/jats:sec>","DOI":"10.1111\/trf.18140","type":"journal-article","created":{"date-parts":[[2025,1,19]],"date-time":"2025-01-19T23:34:57Z","timestamp":1737329697000},"page":"560-574","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Red blood cell urate levels are linked to hemolysis in vitro and post\u2010transfusion as a function of donor sex, population and genetic polymorphisms in <scp>SLC2A9<\/scp> and <scp>ABCG2<\/scp>"],"prefix":"10.1111","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8787-8144","authenticated-orcid":false,"given":"Alicia M.","family":"Key","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Molecular Genetics University of Colorado Anschutz Medical Campus  Aurora Colorado 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Colorado Anschutz Medical Campus  Aurora Colorado USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1843-7900","authenticated-orcid":false,"given":"Gregory R.","family":"Keele","sequence":"additional","affiliation":[{"name":"Department of Biostatistics and Epidemiology RTI International  Research Triangle Park North Carolina USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xutao","family":"Deng","sequence":"additional","affiliation":[{"name":"Vitalant Research Institute  San Francisco California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mars","family":"Stone","sequence":"additional","affiliation":[{"name":"Vitalant Research Institute  San Francisco California USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steve","family":"Kleinman","sequence":"additional","affiliation":[{"name":"University of British Columbia  Victoria British Columbia 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