Host biomarkers of invasive pulmonary aspergillosis to monitor therapeutic response

Mila Krel, Vidmantas Petraitis, Ruta Petraitiene, Mohit Raja Jain, Yanan Zhao, Hong Li, Thomas J. Walsh, David S. Perlin

Research output: Contribution to journalArticlepeer-review

Abstract

Invasive pulmonary aspergillosis (IPA) is a life-threatening disease of immunocompromised patients that requires aggressive therapy. Detection of the disease and monitoring of the therapeutic response during IPA are complex, and current molecular diagnostics are not suitably robust. Here, we explored proteomic profiles of bronchoalveolar lavage fluid (BALF) specimens from a persistently neutropenic rabbit model of IPA. Three experimental arms, uninfected control animals, infected untreated animals, and animals infected and treated with ravuconazole/amphotericin B, were studied. Total proteins were evaluated by twodimensional (2D) gel electrophoresis, followed by matrix-Assisted laser desorption ionization-time of flight/time of flight (MALDI-TOF/TOF) mass spectrometry (MS) and quantified by enzyme-linked immunosorbent assay (ELISA). Host-derived proteins haptoglobin (Hp), C-reactive protein (CRP), and annexin A1 (Anx A1) were prominently found in BALF during the IPA infection and showed significant changes in response to antifungal therapy (P<0.0001). In serum, differences in Hp (P= 0.0001) between infected and treated rabbits were observed. Preliminary in vitro studies revealed that Aspergillus fumigatussecreted proteases may contribute to the cleavage of Anx A1 during IPA. In summary, host protein biomarkers Hp, CRP, and Anx A1 may have value in monitoring therapeutic response to antifungal agents in IPA patients with confirmed disease.

Original languageEnglish (US)
Pages (from-to)3373-3378
Number of pages6
JournalAntimicrobial agents and chemotherapy
Volume58
Issue number6
DOIs
StatePublished - Jun 2014

ASJC Scopus subject areas

  • Pharmacology
  • Pharmacology (medical)
  • Infectious Diseases

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