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Activity of anti-CR3-RP polyclonal antibody against biofilms formed by Candida auris, a multidrug-resistant emerging fungal pathogen

  • Jaroslava Dekkerová
  • Jose L. Lopez-Ribot
  • Helena BujdákováEmail author
Original Article

Abstract

Fungal biofilm has remained a serious medical problem that complicates treatment of mycoses. In particular, once biofilms are formed, they display high levels of resistance against most common antifungals. Candida auris is currently considered as a serious emerging fungal pathogen frequently exhibiting high levels of resistance to antifungals. Recent studies have confirmed that C. auris shares similarity with Candida albicans in regards to virulence-associated proteins involved in adherence and biofilm development. Complement receptor 3-related protein (CR3-RP) is one of the key surface antigens expressed by Candida species during biofilm formation. Here, we have investigated the presence of this cell surface moiety on the surface of C. auris, as well as the potential of anti-CR3-RP polyclonal antibody (Ab) to inhibit biofilm formation by this emerging fungal pathogen. Using indirect immunofluorescence and ELISA, we were able to confirm the presence of CR3-RP in C. auris cells within biofilms. Further, not only anti-CR3-RP Ab was able to inhibit biofilm formation by multiple C. auris strains when added during the adherence phase, but it also demonstrated activity against C. auris 24-h pre-formed biofilms, which compared favorably to levels of inhibition achieved by treatment with current conventional antifungals fluconazole, amphotericin B, and caspofungin. Overall, our data demonstrate the presence of this antigen on the surface of C. auris and points to the potential of anti-CR3-RP Ab in eradication of biofilms formed by this novel fungal pathogen.

Keywords

CR3-RP Polyclonal antibody Biofilm Resistance Candida auris 

Notes

Acknowledgements

The authors wish to thank Daniel Montelongo-Jauregui, MSc. (The University of Texas at San Antonio, TX, USA) for help with performing fluorescence microscopy of indirect immunofluorescence.

Funding

This work was supported by the Slovak Research and Development Agency under contract no. [APVV-15-0347 to H. B.], and by the grant VEGA [1/0628/15 to H. B.] supported by the Ministry of Education, Science, Research and Sport of the Slovak Republic. This research was also supported by Fulbright Commission in Slovak Republic (J. D. was the Fulbright Visiting Student Researcher at J.L.L.R lab during period Sept 2017–Feb 2018). J.L.L.R acknowledges support by the Margaret Batts Tobin Foundation.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Not applicable.

Informed consent

Not applicable.

Supplementary material

10096_2018_3400_MOESM1_ESM.docx (202 kb)
ESM 1 (DOCX 202 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Jaroslava Dekkerová
    • 1
  • Jose L. Lopez-Ribot
    • 2
  • Helena Bujdáková
    • 1
    Email author
  1. 1.Department of Microbiology and Virology, Faculty of Natural SciencesComenius University in BratislavaBratislavaSlovakia
  2. 2.Department of Biology and South Texas Center for Emerging Infectious DiseasesThe University of Texas at San AntonioSan AntonioUSA

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