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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Antiviral activity of nano-realgar against herpes simplex virus Type II in vitro].
Zhong Nan da Xue Xue Bao. Yi Xue Ban = Journal of Central South University. Medical Sciences 2019 October 29
OBJECTIVE: To explore the antiviral activity of nano-realgar against herpes simplex virus Type II (HSV-2) in vitro.
Methods: Acyclovir (ACV) as a positive control, the cytotoxicity of nano-realgar at different concentrations (including 200.00, 150.00, 100.00, 50.00, 25.00, 12.50, 6.25, 3.13, 1.54, 0.78, 0.39 and 0 mg/L) on normal Vero cells were determined by 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assay. HSV-2 virus titer was determined by plaque assay, and the Vero cells model of HSV-2 infection was established. Subsequently, the antiviral effects of nano-realgar at different concentrations (including 20.00, 10.00, 5.00, 2.50, 1.25, 0.63, 0.31, 0.15, 0.08, 0.04 and 0 mg/L) on infected cells model were evaluated by the observation of cytopathic effect (CPE) and MTT method under the 3 modes including pre-treatment, treatment and direct inactivation.
Results: The 50% cytotoxic concentration (CC50) of nano-realgar on Vero cells was 37.15 mg/L. The titer of HSV-2 was 7.30 log PFUs/mL. In the 3 modes, the half-maximal effective concentration (EC50) of nano-realgar on HSV-2 infected Vero cells were 0.13, 1.80 and 0.52 mg/L, and the corresponding therapeutic index (TI) were 285.77, 20.64, 71.44, respectively. The TI value of nano-realgar on pre-treatment mode was higher than that of nano-realgar on treatment and direct inactivation modes.
Conclusion: Nano-realgar can play a good anti-HSV-2 activity in the 3 modes (pre-treatment, treatment and direct inactivation), and the anti-HSV-2 efficacy of nano-realgar on pre-treatment mode is better than that of nano-realagr on other 2 modes.
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