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Synergistic Effects from Combination of Cryptotanshinone and Fosfomycin Against Fosfomycin-Susceptible and Fosfomycin-Resistant Staphylococcus aureus.


ABSTRACT: Purpose:Fosfomycin is now widely used to treat methicillin-resistant S. aureus due to its unique antibacterial activity. However, fosfomycin-resistant S. aureus has rapidly emerged, it is urgent to find new treatments to eliminate fosfomycin-resistant S. aureus infection. The purpose of this study was to analyze the activity of cryptanshinone, a traditional Chinese medicine monomer, in combination with fosfomycin against fosfomycin-sensitive S. aureus (FSSA) and fosfomycin-resistant S. aureus (FRSA). Methods:The MICs of fosfomycin and/or cryptanshinone were determined by agar dilution assay and checkerboard microdilution assay. Furthermore, synergistic effects from fosfomycin and/or cryptanshinone were analyzed by the time-kill assay in vitro. Results:The combination of fosfomycin and cryptotanshinone had a synergistic effect on most (71.43%) of the FRSA and had a partial (28.57%) synergistic effect on a small part. In addition, time sterilization curve verified synergistic activity between cryptanshinone and fosfomycin against FSSA and FRSA, especially when fosfomycin was added for a second time. Conclusion:These data suggest that cryptanshinone combined with fosfomycin could be a novel treatment for FRSA and provide a new direction for the treatment of bacterial infections in the future.

SUBMITTER: Ruan Z 

PROVIDER: S-EPMC7431450 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Synergistic Effects from Combination of Cryptotanshinone and Fosfomycin Against Fosfomycin-Susceptible and Fosfomycin-Resistant <i>Staphylococcus aureus</i>.

Ruan Zijing Z   Cui Jiaqi J   He Zhenqing Z   Guo Yuting Y   Jia Xu X   Huang Xinhe X  

Infection and drug resistance 20200813


<h4>Purpose</h4>Fosfomycin is now widely used to treat methicillin-resistant <i>S. aureus</i> due to its unique antibacterial activity. However, fosfomycin-resistant <i>S. aureus</i> has rapidly emerged, it is urgent to find new treatments to eliminate fosfomycin-resistant <i>S. aureus</i> infection. The purpose of this study was to analyze the activity of cryptanshinone, a traditional Chinese medicine monomer, in combination with fosfomycin against fosfomycin-sensitive <i>S. aureus</i> (FSSA) a  ...[more]

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