BMC microbiology · 2022
The synergistic effect of minocycline and azole antifungal drugs against Scedosporium and Lomentospora species.
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Yang Fang, Sun Yi, Lu Qiaoyun
Аннотация
BACKGROUND: This study was aimed to determine the potency of Minocycline (MIN) and azoles, including itraconazole (ITR), voriconazole (VOR) and posaconazole (POS) against Scedosporium and Lomentospora species.
RESULTS: This study revealed that MIN exhibited no significant antifungal activity against any of the tested strains, whereas in vitro combination of MIN with ITR, VOR or POS showed satisfactory synergistic effects against 8 (80%), 1 (10%), and 9 (90%) strains, respectively. Moreover, combined use of MIN with azoles decreased the minimum inhibitory concentration (MIC) range from 5.33-16 μg/ml to 1-16 μg/ml for ITR, from 0.42-16 μg/ml to 0.21-16 μg/ml for VOR, and from 1.33-16 μg/ml to 0.33-16 μg/ml for POS. Meanwhile, no antagonistic interactions were observed between the above combinations. The G. mellonella infection model demonstrated the in vivo synergistic antifungal effect of MIN and azoles.
CONCLUSIONS: The present study demonstrated that combinations between MIN and azoles lead to synergistic antimicrobial effects on Scedosporium and Lomentospora species, while showing a potential for overcoming and preventing azole resistance.
RESULTS: This study revealed that MIN exhibited no significant antifungal activity against any of the tested strains, whereas in vitro combination of MIN with ITR, VOR or POS showed satisfactory synergistic effects against 8 (80%), 1 (10%), and 9 (90%) strains, respectively. Moreover, combined use of MIN with azoles decreased the minimum inhibitory concentration (MIC) range from 5.33-16 μg/ml to 1-16 μg/ml for ITR, from 0.42-16 μg/ml to 0.21-16 μg/ml for VOR, and from 1.33-16 μg/ml to 0.33-16 μg/ml for POS. Meanwhile, no antagonistic interactions were observed between the above combinations. The G. mellonella infection model demonstrated the in vivo synergistic antifungal effect of MIN and azoles.
CONCLUSIONS: The present study demonstrated that combinations between MIN and azoles lead to synergistic antimicrobial effects on Scedosporium and Lomentospora species, while showing a potential for overcoming and preventing azole resistance.