Journal
FUTURE MICROBIOLOGY
Volume 15, Issue 1, Pages 9-20Publisher
FUTURE MEDICINE LTD
DOI: 10.2217/fmb-2019-0186
Keywords
antifungal resistance; biofilm resistance; biofilms; fungal keratitis; Fusarium solani; promethazine; synergism
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Funding
- CNPq (National Council for Scientific and Technological Development, Brazil) [430193/2018-1]
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Aim: To evaluate the inhibition of efflux pumps by using promethazine (PMZ) as a strategy to control Fusarium solani species complex (FSSC). Materials & methods: The susceptibility of FSSC strains to PMZ and the interaction between PMZ and antifungals were evaluated. The efflux pump activity was confirmed by flow cytometry with rhodamine 6G. Finally, PMZ was tested against FSSC biofilms. Results: PMZ inhibited FSSC planktonic growth and showed synergism with antifungals. PMZ reduced R6G efflux and inhibited cell adhesion, impaired the development of biofilms and disrupted mature biofilms. PMZ-challenged biofilms showed increased sensitivity to amphotericin B. Conclusion: The study provides indirect evidence of the occurrence of efflux pumps in FSSC and opens a perspective for this target in the control of fusariosis.
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