An extract from the earthworm Eisenia fetida non-specifically inhibits the activity of influenza and adenoviruses  

作　　者：Zhizhen Liu Jianhua Wang Jianlin Zhang Baofeng Yu Bo Niu 

机构地区：[1]Biochemistry and Molecular Biology,Shanxi Medical University [2]Department of Biology technology,Capital Institute of Pediatrics

出　　处：《Journal of Traditional Chinese Medicine》2012年第4期657-663,共7页中医杂志（英文版）

摘　　要：OBJECTIVE： To test the in vitro antiviral activity of a crude tissue extract （CTE/from the earthworm Eisenia fetida, determine any effective components in the CTE, andelucidate possiblemechanismsofaction. METHODS： A CTE was made by homogenizing earthworms, followed by treatment with ammoni- um sulfate, then thermal denaturation. Inhibition of virus-induced cytopathic effect （CPE） was used to assess antiviral activity. Chromatographic analy- sis was used to identify effective components in the CTE. RESULTS： The CTE inhibited viral CPE at non-cyto- toxic concentrations. Chromatography indicated that antiviral components corresponded to three active peaks indicative of proteases, nucleases and lysozymes. For adenoviruses, reduction in viral ac- tivity occurred for 100 lag/mL CTE. The reduction in adenoviral activity for four fractions was 100%, 91.8%, 86.9%, and 94.7%. For influenza viruses, re- duction in viral activity of 100%, 86.6%, 69.1% and 88.3% was observed for 37 pg/mL CTE. In addition, three active fractions mixture had stronger antiviral activity （98.7% and 96.7%） than three fractions alone.Gel electrophoresis results indicated that nu- cleases from E. fetida could degrade the genome of influenza viruses and adenoviruses. CONCLUSION： The earthworm CTE displayed non-specific antiviral properties, possibly mediated by a combination of proteases, nucleases and lyso- zymes. Nucleases likely participate in the antiviral process, and degrade the genome of the virus thereby preventing further replication.OBJECTIVE:To test the in vitro antiviral activity of a crudetissueextract(CTE)fromtheearthwormEisenia fetida,determine any effective components in the CTE,andelucidatepossiblemechanismsofaction.METHODS:A CTE was made by homogenizing earthworms,followed by treatment with ammonium sulfate,then thermal denaturation.Inhibition of virus-induced cytopathic effect(CPE) was used to assess antiviral activity.Chromatographic analysis was used to identify effective components in the CTE.RESULTS:The CTE inhibited viral CPE at non-cytotoxic concentrations.Chromatography indicated that antiviral components corresponded to three active peaks indicative of proteases,nucleases and lysozymes.For adenoviruses,reduction in viral activity occurred for 100 μg/mL CTE.The reduction in adenoviral activity for four fractions was 100%,91.8%,86.9%,and 94.7%.For influenza viruses,reduction in viral activity of 100%,86.6%,69.1% and 88.3% was observed for 37 μg/mL CTE.In addition,three active fractions mixture had stronger antiviral activity(98.7% and 96.7%) than three fractions alone.Gel electrophoresis results indicated that nucleases from E.fetida could degrade the genome of influenza viruses and adenoviruses.CONCLUSION:The earthworm CTE displayed non-specific antiviral properties,possibly mediated by a combination of proteases,nucleases and lysozymes.Nucleases likely participate in the antiviral process,and degrade the genome of the virus thereby preventing further replication.

关 键 词：Oligochaeta Complex mixtures Influ-enza a virus  HI NI subtype ADENOVIRUSES 

分 类 号：R285[医药卫生—中药学]