Journal of Microbiology and Biotechnology

  • 제27권1호
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  • Pages.19-25
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  • 2017
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  • 1017-7825(pISSN)
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  • 1738-8872(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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Sclareol Protects Staphylococcus aureus-Induced Lung Cell Injury via Inhibiting Alpha-Hemolysin Expression

  • Ouyang, Ping (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Sun, Mao (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • He, Xuewen (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Wang, Kaiyu (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Yin, Zhongqiong (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Fu, Hualin (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Li, Yinglun (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Geng, Yi (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Shu, Gang (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • He, Changliang (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Liang, Xiaoxia (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Lai, Weiming (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Li, Lixia (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Zou, Yunfeng (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Song, Xu (College of Veterinary Medicine, Sichuan Agriculture University) ;
  • Yin, Lizi (College of Veterinary Medicine, Sichuan Agriculture University)
  • 투고 : 2016.06.16
  • 심사 : 2016.09.20
  • 발행 : 2017.01.28
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초록

Staphylococcus aureus (S. aureus) is a common gram-positive bacterium that causes serious infections in humans and animals. With the continuous emergence of methicillin-resistant S. aureus (MRSA) strains, antibiotics have limited efficacy in treating MRSA infections. Accordingly, novel agents that act on new targets are desperately needed to combat these infections. S. aureus alpha-hemolysin plays an indispensable role in its pathogenicity. In this study, we demonstrate that sclareol, a fragrant chemical compound found in clary sage, can prominently decrease alpha-hemolysin secretion in S. aureus strain USA300 at sub-inhibitory concentrations. Hemolysis assays, western-blotting, and RT-PCR were used to detect the production of alpha-hemolysin in the culture supernatant. When USA300 was co-cultured with A549 epithelial cells, sclareol could protect the A549 cells at a final concentration of $8{\mu}g/ml$. The protective capability of sclareol against the USA300-mediated injury of A549 cells was further shown by cytotoxicity assays and live/dead analysis. In conclusion, sclareol was shown to inhibit the production of S. aureus alpha-hemolysin. Sclareol has potential for development as a new agent to treat S. aureus infections.

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