[Intracellular clearance of Coxsakievirus B3 infection by short interfering RNA and its mechanism study].

OBJECTIVE: To evaluate the possibility of short interfering RNA (siRNA) inhibiting Coxsackievirus B3 (CVB3) infection in vitro, and discover the mechanism initially. METHODS: We obtained proper effective dosage of siRNA by observing cytopathic effect (CPE). Estimate its antiviral activities and its pathway of siRNA by Western Blot assay and RT-PCR. RESULTS: Results showed that siRNA-3753 can be effectively transfected into HeLa cells, we can achieve a high transfection efficiency up to 98.77% and its effect can last for 48 h stably in cells. 0.6 micromol/L siRNA-3753 got a high inhibiting effect of virus and didn't show any toxicity to cells. So we consider this concentration as the experimental concentration. siRNA-3753 can debase virus reproduction. The antiviral effect is sequence-specific and is not attributable to either interferon or the interferon response effectors protein kinase R (PKR). CONCLUSION: The data confirmed that siRNA can effectively inhibit CVB3 infection in vitro, its antivirus effect was gained from specific debase of virus genome.