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Validity Assessment for the Results of Three Inflammatory Markers in Exhaled Breath Condensate: A Pilot Study

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Abstract

This study was initiated to assess the validity of eicosanoid determination in exhaled breath condensate by immunoassays. The results were compared to those obtained from liquid chromatographic methods with mass spectrometric detection and with the theoretical spiked amount of condensate. Therefore, spiked exhaled breath condensate was prepared achieving samples for comparison of identical aliquots. The three most often analysed inflammatory markers in the literature, i.e. leukotriene B4, prostaglandin E2, and 8-isoprostane-prostaglandin F2α were selected for comparison. Three concentrations of spiked and non-spiked breath condensate matrix were examined. There was an up to 800% overestimation of the eicosanoid quantities revealed by the immunoassay kits used in this study compared to the liquid chromatographic method with mass spectrometric detection which was in line with the nominal amount spiked. Full validation of immunoassay for the determination of inflammatory markers should be performed before further interpretations and consequences will be taken from the absolute values quantified by enzyme-immunoassays. For improving the accuracy of enzyme linked immunoassay (ELISA) results a collaborative work applying ELISA and LC–MS–MS should be performed in order to spotlight the advantages of the ELISA-method.

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Acknowledgments

The authors want to thank Mrs. Musiol and Mrs. Dewes for the support organizing this study and Mrs. Decker for her technical assistance for the ELISA technique. Special thanks to Kathy Bischof for her editorial assistance. Furthermore, the authors would like to thank Dr. Thomas Schettgen for preparing the revision of the manuscript.

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Authors and Affiliations

  1. Institute and Outpatient-Clinic for Occupational and Social Medicine, Medical Faculty, RWTH Aachen University, Pauwelsstrasse 30, 52074, Aachen, Germany

    Luis M. Gonzalez-Reche, Thomas Göen & Thomas Kraus

  2. Medizinische Klinik III, Division of Allergology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Universitätsstr. 29, 91054, Erlangen, Germany

    Dirk Schaefer

  3. Institute of Occupational, Social and Environmental Medicine, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schillerstr. 25, 91054, Erlangen, Germany

    Thomas Göen

Authors
  1. Luis M. Gonzalez-Reche
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  2. Dirk Schaefer
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  3. Thomas Göen
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  4. Thomas Kraus
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Correspondence to Thomas Kraus.

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Gonzalez-Reche, L.M., Schaefer, D., Göen, T. et al. Validity Assessment for the Results of Three Inflammatory Markers in Exhaled Breath Condensate: A Pilot Study. Chroma 70, 1387–1392 (2009). https://doi.org/10.1365/s10337-009-1313-7

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  • DOI: https://doi.org/10.1365/s10337-009-1313-7

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