期刊
JOURNAL OF MICROBIOLOGY
卷 50, 期 2, 页码 293-300出版社
MICROBIOLOGICAL SOCIETY KOREA
DOI: 10.1007/s12275-012-2068-7
关键词
Rhus verniciflua; anti-viral activity; infectious hematopoietic necrosis virus; viral hemorrhagic septicemia virus; flavonoids
类别
资金
- Chonnam National University
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2009-0076909]
- National Research Foundation of Korea [2009-0076909] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
An 80% methanolic extract of Rhus verniciflua Stokes bark showed significant anti-viral activity against fish pathogenic infectious hematopoietic necrosis virus (IHNV) and viral hemorrhagic septicemia virus (VHSV) in a cell-based assay measuring virus-induced cytopathic effect (CPE). Activity-guided fractionation and isolation for the 80% methanolic extract of R. verniciflua yielded the most active ethyl acetate fraction, and methyl gallate (1) and four flavonoids: fustin (2), fisetin (3), butin (4) and sulfuretin (5). Among them, fisetin (3) exhibited high antiviral activities against both IHNV and VHSV showing EC50 values of 27.1 and 33.3 mu M with selective indices (SI = CC50/EC50) more than 15, respectively. Fustin (2) and sulfuretin (5) displayed significant antiviral activities showing EC50 values of 91.2-197.3 mu M against IHNV and VHSV. In addition, the antiviral activity of fisetin against IHNV and VHSV occurred up to 5 hr post-infection and was not associated with direct virucidal effects in a timed addition study using a plaque reduction assay. These results suggested that the bark of R. verniciflua and isolated flavonoids have significant anti-viral activity against IHNV and VHSV, and also have potential to be used as anti-viral therapeutics against fish viral diseases.
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