In addition to questions that can be answered by the randomised trial, we have also created a bioresource of the 50,000 trial participants to address other epidemiological questions, particularly those relating to genetics.
In all participants, we have:
- collated basic lifestyle and self-reported health nformation using a web-based questionnaire;
- assayed a genome-wide genotyping array containing >800,000 genetic variants;imputed from this array backbone to >80 million variants;
- used a Sysmex haematology analyser to assay >50 blood cell parameters;assessed ~230 metabolites using a NMR platform covering lipoproteins, lipids and low molecular weight metabolites.
In subsets of participants, we have:
- conducted high-depth (50x) whole exome sequencing;conducted low-pass (15x) whole genome sequencing;measured thousands of soluble proteins using a novel aptamer-based assay approach;
- assayed >1000 metabolites using a mass-spectrometry platform;
- assayed >400 lipid species using a bespoke mass-spectrometry platform;
- measured candidate biomarkers of relevance to blood donation (eg, iron-related markers);
- assessed cognitive function using a validated four-domain online testing platform.
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