{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,17]],"date-time":"2026-08-17T14:42:10Z","timestamp":1786977730656,"version":"build-2736575974"},"reference-count":32,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2014,4,17]],"date-time":"2014-04-17T00:00:00Z","timestamp":1397692800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"EnviroGenomarkers","award":["226756"],"award-info":[{"award-number":["226756"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Environ and Mol Mutagen"],"published-print":{"date-parts":[[2014,7]]},"abstract":"<jats:p>In the context of environmental health research, biobank blood samples have recently been identified as suitable for high\u2010throughput omics analyses enabling the identification of new biomarkers of exposure and disease. However, blood samples containing the anti\u2010coagulant heparin could complicate transcriptomic analysis because heparin may inhibit RNA polymerase causing inefficient cRNA synthesis and fluorophore labelling. We investigated the inhibitory effect of heparin and the influence of storage conditions (0 or 3 hr bench times, storage at room temperature or \u221280\u00b0C) on fluorophore labelling in heparinized fresh human buffy coat and whole blood biobank samples during the mRNA work\u2010up protocol for microarray analysis. Subsequently, we removed heparin by lithium chloride (LiCl) treatment and performed a quality control analysis of LiCl\u2010treated biobank sample microarrays to prove their suitability for downstream data analysis. Both fresh and biobank samples experienced varying degrees of heparin\u2010induced inhibition of fluorophore labelling, making most samples unusable for microarray analysis. RNA derived from EDTA and citrate blood was not inhibited. No effect of bench time was observed but room temperature storage gave slightly better results. Strong correlations were observed between original blood sample RNA yield and the amount of synthesized cRNA. LiCl treatment restored sample quality to normal standards in both fresh and biobank samples and the previously identified correlations disappeared. Microarrays hybridized with LiCl\u2010treated biobank samples were of excellent quality with no identifiable influence of heparin. We conclude that, to obtain high quality results, in most cases heparin removal is essential in blood\u2010derived RNA samples intended for microarray analysis. Environ. Mol. Mutagen. 55:482\u2013491, 2014. \u00a9 2014 Wiley Periodicals, Inc.<\/jats:p>","DOI":"10.1002\/em.21869","type":"journal-article","created":{"date-parts":[[2014,4,17]],"date-time":"2014-04-17T01:49:24Z","timestamp":1397699364000},"page":"482-491","source":"Crossref","is-referenced-by-count":8,"title":["Elimination of heparin interference during microarray processing of fresh and biobank\u2010archived blood samples"],"prefix":"10.1002","volume":"55","author":[{"given":"Dennie G.A.J.","family":"Hebels","sequence":"first","affiliation":[{"name":"Department of Toxicogenomics Maastricht University, Universiteitssingel 50 6229 ER Maastricht The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcel H.M.","family":"van Herwijnen","sequence":"additional","affiliation":[{"name":"Department of Toxicogenomics Maastricht University, Universiteitssingel 50 6229 ER Maastricht The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karen 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