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Craddock RM, Huang JT, Jackson E, Harris N, Torrey EF, Herberth M, Bahn S. Increased alpha-defensins as a blood marker for schizophrenia susceptibility. Mol Cell Proteomics . 2008 Jul 1 ; 7(7):1204-13. PubMed Abstract

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Comment by:  Stephen J. Glatt
Submitted 16 July 2008 Posted 16 July 2008

The approach taken by Rachel Craddock and Sabine Bahn’s group is highly laudable. The work represents a beautiful marriage of highly technical cutting-edge proteomics and classical genetic epidemiology, which still shows its worth. Only by including discordant monozygotic twins is it possible to see that the increase in α-defensins is associated not only with having schizophrenia, but with the risk for the disorder. This goes a long way to establish these as possible early risk indicators. Obvious future studies would include longitudinal profiling of α-defensin levels in individuals who are clinically or genetically at risk for schizophrenia, as well as analyses of the specificity (vis-à-vis bipolar disorder, for example). In addition, while this type of high(er)-throughput proteomic research is likely to identify some potentially distinguishing biomarkers, it is likely that the effects of some risk-conferring genetic polymorphisms are not easily reflected in alterations in protein levels or even in their configuration, so a multi-level analysis and integration of...  Read more

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