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本实验改进了鸭乙型肝炎病毒(DHBV)复制复合体(RCs)的制备方法,研究了14种中药复方和单味药提取物及30种成分药对DHBV DNA、聚合酶(DNAP)和逆转录酶(RT)的抑制作用。发现小柴胡汤提取物对DHBV RT和DNAP有轻度抑制作用,其7味药提取物中,黄芩和半夏对RT的半数抑制浓度(IC50)分别为1.25和18.6mg/ml,黄芩对DNAP的IC50为0.925mg/ml。鸭体内实验证明,口服给予黄芩水煎剂(5g/kg,每日3次,共10天)可显著降低鸭血清中DHBV DNA水平。此外,虎杖提取物对RT的IC50为1.76mg/ml,鱼腥草素等9种成分药对RT有轻度抑制作用。 相似文献
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海南粗榧内酯(Hainanolide)的抗病毒作用 总被引:2,自引:0,他引:2
Hainanolide in tissue culture was noticed to have a plaque formation inhibiting activity against influenza virus type A (WS), Newcastle disease virus, Japanese B encephalitis virus (A 2) and vaccina virus. The maximal tolerated dose of the drug was 0.5 μg/disc. The minimal antiviral doses of the drug were 0.05~0.5μg/disc. The zone of inhibition against viruses extended about 15~50 mm wide. 相似文献
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