Ibuprofen reverts antifungal resistance on Candida albicans showing overexpression of CDR genes

• Type: Article in International Scientific Journal
• Date: 2009

Authors

ricardo, e (Author) Other; costa-de-oliveira, s (Author) FMUP; dias, as (Author) Other; guerra, j (Author) Other; rodrigues, ag (Author) FMUP; pina-vaz, c (Author) FMUP

Journal

Title: FEMS Yeast Research

Vol. 9

Pages: 618-625

ISSN: 1567-1356

Publisher: Oxford University Press

Indexing

ISI Web of Knowledge - 48 Citations

Scopus - 52 Citations

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

Authenticus ID: P-003-JGJ

DOI: 10.1111/j.1567-1364.2009.00504.x

Abstract (EN): Several mechanisms may be associated with Candida albicans resistance to azoles. Ibuprofen was described as being able to revert resistance related to efflux activity in Candida. The aim of this study was to uncover the molecular base of antifungal resistance in C. albicans clinical strains that could be reverted by ibuprofen. Sixty-two clinical isolates and five control strains of C. albicans were studied: the azole susceptibility phenotype was determined according to the Clinical Laboratory for Standards Institute, M27-A2 protocol and minimal inhibitory concentration values were recalculated with ibuprofen (100 mu g mL(-1)); synergistic studies between fluconazole and FK506, a Cdr1p inhibitor, were performed using an agar disk diffusion assay and were compared with ibuprofen results. Gene expression was quantified by real-time PCR, with and without ibuprofen, regarding CDR1, CDR2, MDR1, encoding for efflux pumps, and ERG11, encoding for azole target protein. A correlation between susceptibility phenotype and resistance gene expression profiles was determined. Ibuprofen and FK506 showed a clear synergistic effect when combined with fluconazole. Resistant isolates reverting to susceptible after incubation with ibuprofen showed CDR1 and CDR2 overexpression especially of the latter. Conversely, strains that did not revert displayed a remarkable increase in ERG11 expression along with CDR genes. Ibuprofen did not alter resistance gene expression significantly (P > 0.05), probably acting as a Cdrp blocker.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8