TY - JOUR A1 - Gruden, Kristina A1 - Hren, Matjaz A1 - Herman, Ana A1 - Blejec, Andrej A1 - Albrecht, Tanja A1 - Selbig, Joachim A1 - Bauer, Christian G. A1 - Schuchardt, Johannes A1 - Or-Guil, Michal A1 - Zupancic, Klemen A1 - Svajger, Urban A1 - Stabuc, Borut A1 - Ihan, Alojz A1 - Kopitar, Andreja Natasa A1 - Ravnikar, Maja A1 - Knezevic, Miomir A1 - Rozman, Primoz A1 - Jeras, Matjaz T1 - A "Crossomics" study analysing variability of different components in peripheral blood of healthy caucasoid individuals JF - PLoS one N2 - Background: Different immunotherapy approaches for the treatment of cancer and autoimmune diseases are being developed and tested in clinical studies worldwide. Their resulting complex experimental data should be properly evaluated, therefore reliable normal healthy control baseline values are indispensable. Methodology/Principal Findings: To assess intra- and inter-individual variability of various biomarkers, peripheral blood of 16 age and gender equilibrated healthy volunteers was sampled on 3 different days within a period of one month. Complex "crossomics'' analyses of plasma metabolite profiles, antibody concentrations and lymphocyte subset counts as well as whole genome expression profiling in CD4(+)T and NK cells were performed. Some of the observed age, gender and BMI dependences are in agreement with the existing knowledge, like negative correlation between sex hormone levels and age or BMI related increase in lipids and soluble sugars. Thus we can assume that the distribution of all 39.743 analysed markers is well representing the normal Caucasoid population. All lymphocyte subsets, 20% of metabolites and less than 10% of genes, were identified as highly variable in our dataset. Conclusions/Significance: Our study shows that the intra- individual variability was at least two-fold lower compared to the inter-individual one at all investigated levels, showing the importance of personalised medicine approach from yet another perspective. Y1 - 2012 U6 - https://doi.org/10.1371/journal.pone.0028761 SN - 1932-6203 VL - 7 IS - 1 PB - PLoS CY - San Fransisco ER -