Evaluation of host-based molecular markers for the early detection of human sepsis.

J Biotechnol

Institute of Computational Biotechnology, Graz University of Technology, Petersgasse 14/V, 8010, Graz, Styria, Austria; CNA Diagnostics GmbH, Parkring 18, 8074, Grambach, Styria, Austria; BioTechMed Graz, Mozartgasse 12/II, 8010, Graz, Styria, Austria. Electronic address:

Published: February 2020

We have identified 24 molecular markers, based on circulating nucleic acids (CNA) originating from the human genome, which in combination can be used in a quantitative real-time PCR (qPCR) assay to identify the presence of human sepsis, starting two to three days before the first clinical signs develop and including patients who meet the SEPSIS-3 criteria. The accuracy was more than 87 % inside of the same patient cohort for which the markers were developed and up to 81 % in blind studies of patient cohorts which were not included in the marker development. As our markers are host-based, they can be used to capture bacterial as well as fungal sepsis, unlike the current PCR-based tests, which require species-specific primer sets for each organism causing human sepsis. Our assay directly uses an aliquot of cell-free blood as the substrate for the PCR reaction, thus allowing to obtain the diagnostic results in three to four hours after the collection of the blood samples.

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http://dx.doi.org/10.1016/j.jbiotec.2020.01.013DOI Listing

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