Abstract
Purpose
Infections and subsequent septicemia are major complications in neutropenic patients with hematological malignancies. Here, we identify biomarker candidates for the early detection of an infectious origin, and monitoring of febrile neutropenia (FN).
Methods
Proteome, metabolome, and conventional biomarkers from 20 patients with febrile neutropenia without proven infection (FNPI) were compared to 28 patients with proven infection, including 17 patients with bacteremia.
Results
Three peptides (mass to charge ratio 1017.4–1057.3; p-values 0.011–0.024), six proteins (mass to charge ratio 6881–17,215; p-values 0.002–0.004), and six phosphatidylcholines (p-values 0.007–0.037) were identified that differed in FNPI patients compared to patients with infection or bacteremia. Seven of these marker candidates discriminated FNPI from infection at fever onset with higher sensitivity and specificity (ROC-AUC 0.688–0.824) than conventional biomarkers i.e., procalcitonin, C–reactive protein, or interleukin–6 (ROC-AUC 0.535–0.672). In a post hoc analysis, monitoring the time course of four lysophosphatidylcholines, threonine, and tryptophan allowed for discrimination of patients with or without resolution of FN (ROC-AUC 0.648–0.919) with higher accuracy compared to conventional markers (ROC-AUC 0.514–0.871).
Conclusions
Twenty-one promising biomarker candidates for the early detection of an infectious origin or for monitoring the course of FN were found which might overcome known shortcomings of conventional markers.
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Acknowledgments
We wish to thank Viola Bahr, Cora Richert, Julia Köhler, Kay Stötzer, Sandra Wacker, Andrea Naumann, Heike Simon, and Sandra Pöschmann for technical assistance. This study was supported by the Federal Ministry of Education and Research (BMBF), Germany, FKZ: 01EO1002. The project was further supported by the Paul-Martini-Sepsis Research Group, funded by the Thuringian Ministry of Education, Science and Culture (ProExcellence; grant PE 108-2); the public funded Thuringian Foundation for Technology, Innovation and Research (STIFT), and the German Sepsis Society (GSS).
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M. E. Richter and S. Neugebauer contributed equally to this manuscript.
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Richter, M.E., Neugebauer, S., Engelmann, F. et al. Biomarker candidates for the detection of an infectious etiology of febrile neutropenia. Infection 44, 175–186 (2016). https://doi.org/10.1007/s15010-015-0830-6
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DOI: https://doi.org/10.1007/s15010-015-0830-6