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Variance decomposition of protein profiles from antibody arrays using a longitudinal twin model
KTH, School of Biotechnology (BIO), Proteomics (closed 20130101). KTH, Centres, Science for Life Laboratory, SciLifeLab.ORCID iD: 0000-0002-1855-703X
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2011 (English)In: Proteome Science, ISSN 1477-5956, Vol. 9, no 1, 73- p.Article in journal (Refereed) Published
Abstract [en]

The advent of affinity-based proteomics technologies for global protein profiling provides the prospect of finding new molecular biomarkers for common, multifactorial disorders. The molecular phenotypes obtained from studies on such platforms are driven by multiple sources, including genetic, environmental, and experimental. In characterizing the contribution of different sources of variation to the measured phenotypes, the aim is to facilitate the design and interpretation of future biomedical studies employing exploratory and multiplexed technologies. Thus, biometrical genetic modelling of twin or other family data can be used to decompose the variation underlying a phenotype into biological and experimental components. RESULTS: Using antibody suspension bead arrays and antibodies from the Human Protein Atlas, we study unfractionated serum from a longitudinal study on 154 twins. In this study, we provide a detailed description of how the variation in a molecular phenotype in terms of protein profile can be decomposed into familial i.e. genetic and common environmental; individual environmental, short-term biological and experimental components. The results show that across 69 antibodies analyzed in the study, the median proportion of the total variation explained by familial sources is 12% (IQR 1-22%), and the median proportion of the total variation attributable to experimental sources is 63% (IQR 53-72%). CONCLUSION: The variability analysis of antibody arrays highlights the importance to consider variability components and their relative contributions when designing and evaluating studies for biomarker discover with exploratory, high-throughput and multiplexed methods.

Place, publisher, year, edition, pages
2011. Vol. 9, no 1, 73- p.
Keyword [en]
Variance decomposition, linear mixed-effects model, longitudinal twin study, suspension bead arrays, antibodies, protein profiling
National Category
Medical Biotechnology
URN: urn:nbn:se:kth:diva-52331DOI: 10.1186/1477-5956-9-73ISI: 000298250300001PubMedID: 22093360ScopusID: 2-s2.0-81155151492OAI: diva2:466296
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Available from: 2011-12-15 Created: 2011-12-15 Last updated: 2012-09-05Bibliographically approved

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Neiman, MajaUhlén, MathiasNilsson, PeterSchwenk, Jochen M.
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Proteomics (closed 20130101)Science for Life Laboratory, SciLifeLab
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