The efflux pump inhibitor tetrandrine exhibits synergism with fluconazole or voriconazole against Candida parapsilosis.

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ID: 4874
2019
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Abstract
In the last two decades, with the wide use of azoles, antifungal resistance among Candida parapsilosis has considered a matter of concern worldwide. The aim of this study is to evaluate the antifungal potentials of tetrandrine (TET) alone and in combination with fluconazole (FLC)/voriconazole (VRC) against C. parapsilosis. Susceptibility tests were performed by microdilution method, checkerboard assay, time-kill test, spot assay. Subsequently, rhodamine 6G efflux test and the expressions of transporter related genes, namely CDR1 and MDR1 for C. parapsilosis were analyzed by qRT-PCR. The susceptibility test showed that TET presented strong synergism with FLC and VRC with fractional inhibitory concentration index (FICI) in a range of 0.094-0.562. The susceptibility results were also confirmed by spot assay and time-kill studies. With TET treatment, a vast quantity of rhodamine 6G could not be pumped out from the cells as considerably intracellular red fluorescence was accumulated. Meanwhile, the expressions of efflux-associated genes presented varying degrees of inhibition. These results indicated that TET was a decent antifungal synergist to promote the antifungal efficacy of FLC/VRC, and the underlying antifungal mechanism might be associated with the inhibition of efflux pump and the elevation of intracellular drug content.
Reference Key
zhao2019themolecular Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zhao, Ya-Jing;Liu, Wei-Da;Shen, Yong-Nian;Li, Dong-Mei;Zhu, Kun-Ju;Zhang, Hong;
Journal molecular biology reports
Year 2019
DOI
10.1007/s11033-019-05020-1
URL
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