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      Potentiation activity of multiple antibacterial agents by Salvianolate from the Chinese medicine Danshen against methicillin-resistant Staphylococcus aureus (MRSA).

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          Abstract

          Salvianolate (SAL) is a prescribed medicine from the Chinese herb Danshen (Salvia miltiorrhiza Bunge). It has been widely used in treatment of coronary and other diseases with significant effects. The in vitro antimicrobial activities of SAL against infectious pathogens were assayed and its combined effects on 10 clinical isolates of SCCmec III type methicillin-resistant Staphylococcus aureus (MRSA) with ten antibiotics were evaluated. Susceptibility to each agent alone was tested using a broth microdilution method, and the chequerboard and time-kill experiments were used for the combined activities. The results showed MIC was 128-256 mg/L for SAL used alone against MRSA. Significant synergies were observed for SAL/Ampicillin (Fosfomycin, Erythromycin, Piperacillin-tazobactam or Clindamycin) combination against over half of the isolates, with their MICs reduced by times of dilution (TOD) to 4-32 (FICIs 0.375-0.5), respectively. SAL/AMP combination showed the best combined effect of synergy on bacteriostatic and bactericidal activities, while SAL/AMK combination reversed the resistance of MRSA to AMK. The results demonstrated that SAL enhanced widely the in vitro anti-MRSA efficacy of the ten antibacterial agents, which had potential for combinatory therapy of patients infected with MRSA and warrants further investigations.

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          Author and article information

          Journal
          J. Pharmacol. Sci.
          Journal of pharmacological sciences
          Elsevier BV
          1347-8648
          1347-8613
          May 2016
          : 131
          : 1
          Affiliations
          [1 ] Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China; School of Pharmacy, Kunming Medical University, Kunming 650500, China.
          [2 ] School of Basic Medical Sciences, Yunnan Traditional Chinese Medical College, Kunming 650500, China.
          [3 ] Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China. Electronic address: zuoguoying@263.net.
          [4 ] Research Center for Natural Medicines, Kunming General Hospital of Chengdu Military Command, Kunming 650032, China.
          Article
          S1347-8613(15)00220-0
          10.1016/j.jphs.2015.10.009
          26639445
          f650d9e7-89e0-4bda-abb9-f11c2f9f9b0c
          History

          Antibacterial agents,FICI,MRSA,Potentiation,Salvianolate (SAL)

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