四季抗病毒合剂抗A16型柯萨奇病毒作用

Effect of Siji Kangbingdu Mixture on Inhibition of the Proliferation of Coxsackievirus A16

目的观察四季抗病毒合剂的抗A16型柯萨奇病毒(CoxA16)作用。方法采用75倍半数(75TCID50)、50 TCID50CoxA16感染Vero细胞模型,5日龄BALB/c乳鼠腹腔注射感染1×106TCID50CoxA16建立动物模型,分别检测四季抗病毒合剂对CoxA16感染Vero细胞损伤的量效、时效指标;观察不同剂量四季抗病毒合剂对病毒感染乳鼠死亡率、存活时间、体质量、临床症状评分等的影响。结果 (1)四季抗病毒合剂对Vero细胞的半数抑制浓度为9.59 mg·m L^(-1);(2)32.3 g·kg^(-1)单次和连续给予四季抗病毒合剂对5日龄BALB/c乳鼠无明显致毒作用;(3)四季抗病毒合剂对CoxA16病毒具有显著抑制作用。浓度>1.22 mg·m L^(-1)四季抗病毒合剂能显著提高Vero细胞存活率,抑制75 TCID50和50 TCID50CoxA16诱发Vero细胞病变;(4)四季抗病毒合剂可显著改善CoxA16病毒感染乳鼠的临床症状,当剂量>1.62g·kg^(-1)时,乳鼠存活率等指标与利巴韦林相当或略高,且临床评分优于利巴韦林。结论四季抗病毒合剂可显著抑制CoxA16细胞增殖,明显降低CoxA16诱发乳鼠病毒性致死率,显著改善乳鼠感染病毒的临床症状评分。

Objective To verify the antiviral effects of Siji Kangbingdu mixture （SJKBDM） against coxsackievirus A16 （CoxA16）.Methods Vero cells and 5-day-old suckling mice, injected with 75/50 and 1×106 TCID50 CoxA16, were used as evaluation models.The preventive influences of SJKBDM against CoxA16 in Vero cells were assessed in the models.The effects of SJKBDM on the mortality, survival time, change rate of body weight, and clinical symptom scores of suckling mice were observed.Results ①The half maximal inhibitory concentration of SJKBDM on Vero cells was 9.59 mg·mL-1.②Toxic effects were not observed from 32.3 g·kg-1 single dose or continuous intraperitoneal injectin of SJKBDM in suckling BALB/c mice.③The SJKBDM had significant inhibitory effect against CoxA16 virus.Doses higher than 1.22 mg·mL-1 could significantly improve the Vero cell survival rate, and the SJKBDM inhibition of 75/50 TCID50 CoxA16 induced pathological changes in Vero cells.④The SJKBDM significantly improved clinical symptoms of mice with CoxA16 viral infection, especially with crude drug doses of higher than 1.62 g·kg-1.The survival rate and other indicators were comparable or slightly higher compared with ribavirin, and the clinical score was higher than that of ribavirin.Conclusion The SJKBDM has significant inhibitory effect on CoxA16 cell proliferation, significantly decreases death rate, and improves clinical symptoms of mice infected with CoxA16 virus.