Simple data-reduction method for high-resolution LC-MS data in metabolomics

RA Scheltema, S Decuypere, JC Dujardin, DG Watson, RC Jansen, R Breitling

    Research output: Contribution to journalA1: Web of Science-article

    Abstract

    Metabolomics LC-MS experiments yield large numbers of peaks, few of which can be identified by database matching. Many of the remaining peaks correspond to derivatives of identified peaks (e.g., isotope peaks, adducts, fragments and multiply charged molecules). In this article, we present a data-reduction approach that automatically identifies these derivative peaks. Results: Using data-driven clustering based on chromatographic peak shape correlation and intensity patterns across biological replicates, derivative peaks can be reliably identified. Using a test data set obtained from Leishmania donovani extracts, we achieved a 60% reduction of the number of peaks. After quality control filtering, almost 80% of the peaks could putatively be identified by database matching. Conclusion: Automated peak filtering substantially speeds up the data-interpretation process.
    Original languageEnglish
    JournalBioanalysis
    Volume1
    Issue number9
    Pages (from-to)1551-1557
    Number of pages7
    ISSN1757-6180
    DOIs
    Publication statusPublished - 2009

    Keywords

    • B780-tropical-medicine
    • Protozoal diseases
    • Leishmaniasis
    • Leishmania donovani
    • Vectors
    • Sandflies
    • Metabolomics
    • Experimental
    • Clustering
    • Chromatography
    • Data processing
    • Laboratory techniques and procedures

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