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Screening compounds of Chinese medicinal herbs anti-Marek's disease virus

Screening compounds of Chinese medicinal herbs anti-Marek's disease virus

Pharmaceutical Biology 52(7): 841-847

Marek's disease (MD) seriously threatens the world poultry industry and has resulted in great economic losses. Chinese medicinal herbs are a rich source for lead compounds and drug candidates for antiviral treatments. To investigate the anti-MDV activity and mechanism of 20 compounds extracted from Chinese medicinal herbs. Antiviral assay, time of addition experiments, and virucidal assay were performed on chicken embryo fibroblast cells. The 50% cytotoxic concentration and 50% effective concentration were determined and, accordingly, selectivity index and inhibition ratio were calculated. Antiviral assay showed dipotassium glycyrrhizinate (DG) and sodium tanshinone IIA sulfonate (STS) exhibited significantly inhibitory activity against MDV in a dose-dependent manner. EC50 of DG and STS were 893.5 ± 36.99 µg/mL and 54.82 ± 2.99 µg/mL, and selective index (SI) were >3.36 and >9.12, respectively. Time of addition experiment and virucidal assay demonstrated DG inhibited viral replication in the full replication cycle and inactivated MDV particles in non-time-dependent manner, but STS interfered with the early stage of MDV replication and inactivated MDV particles in a time-dependent manner. Moreover, both DG and STS promoted apoptosis of cells infected by MDV. DG and STS have great potential for developing new anti-MDV drugs for clinic application.

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Accession: 055670560

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PMID: 24920229

DOI: 10.3109/13880209.2013.871639

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