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Issue 11, 2010
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A practical approach to detect unique metabolic patterns for personalized medicine

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Abstract

Information-rich technologies have advanced personalized medicine, yet obstacles limit measurement of large numbers of chemicals in human samples. Current laboratory tests measure hundreds of chemicals based upon existing knowledge of exposures, metabolism and disease mechanisms. Practical issues of cost and throughput preclude measurement of thousands of chemicals. Additionally, individuals are genetically diverse and have different exposures and response characteristics; some have disease mechanisms that have not yet been elucidated. Consequently, methods are needed to detect unique metabolic characteristics without presumption of known pathways, exposures or disease mechanisms, i.e., using a top-down approach. In this report, we describe profiling of human plasma with liquid chromatography (LC) coupled to Fourier-transform mass spectrometry (FTMS). FTMS is a high-resolution mass spectrometer providing mass accuracy and resolution to discriminate thousands of m/z features, which are peaks defined by m/z, retention time and intensity. We demonstrate that LC-FTMS detects 2000 m/z features in 10 min. These features include known and unidentified chemicals with m/z between 85 and 850, most with <10% coefficient of variation. Comparison of metabolic profiles for 4 healthy individuals showed that 62% of the m/z features were common while 10% were unique and 770 discriminated the individuals. Because the simple one-step extraction and automated analysis is rapid and cost-effective, the approach is practical for personalized medicine. This provides a basis to rapidly characterize novel metabolic patterns which can be linked to genetics, environment and/or lifestyle.

Graphical abstract: A practical approach to detect unique metabolic patterns for personalized medicine

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Publication details

The article was received on 20 May 2010, accepted on 30 Jul 2010 and first published on 13 Sep 2010


Article type: Paper
DOI: 10.1039/C0AN00333F
Citation: Analyst, 2010,135, 2864-2870
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    A practical approach to detect unique metabolic patterns for personalized medicine

    J. M. Johnson, T. Yu, F. H. Strobel and D. P. Jones, Analyst, 2010, 135, 2864
    DOI: 10.1039/C0AN00333F

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