A series of novel benzimidazole derivatives was synthesized and their anti-Coxsackie virus B3 (CVB3) activity was evaluated in VERO ceils. Compounds 9 and 10 exhibited better inhibitory activity than those of ribavi...A series of novel benzimidazole derivatives was synthesized and their anti-Coxsackie virus B3 (CVB3) activity was evaluated in VERO ceils. Compounds 9 and 10 exhibited better inhibitory activity than those of ribavirin (RBV) with IC50 values of 5.30 and 1.06 μg/mL, respectively. ?2009 Xian Jin Luo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.展开更多
文摘A series of novel benzimidazole derivatives was synthesized and their anti-Coxsackie virus B3 (CVB3) activity was evaluated in VERO ceils. Compounds 9 and 10 exhibited better inhibitory activity than those of ribavirin (RBV) with IC50 values of 5.30 and 1.06 μg/mL, respectively. ?2009 Xian Jin Luo. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
文摘目的观察黄芪甲苷(Astragaloside Ⅳ,AsⅣ)对柯萨奇B组3型病毒(coxsackie virus B3,CVB3)感染的乳鼠心肌细胞和病毒性心肌炎(VMC)乳鼠心脏的修复作用,并探讨其可能作用机制。方法 ①分离培养原代乳鼠心肌细胞,测算AsⅣ对乳鼠心肌细胞的最大无毒浓度(TC0),取乳鼠心肌细胞分为正常对照组、病毒对照组、AsⅣ组。病毒对照组和AsⅣ组分别用1000 TCID50的CVB3病毒感染心肌细胞。AsⅣ组分为五个亚组,细胞长至单层细胞时,分别加入20、10、5、2.5、1.25 mg/L的AsⅣ,当病毒对照组中75%以上的细胞出现病变时结束培养。 MTT法观察各组细胞存活情况(以OD值表示),收集各组细胞上清液,全自动生化分析仪检测乳酸脱氢酶(LDH)、肌酸磷酸激酶(CK-MB)含量。②75只小鼠分为正常对照组、模型对照组、AsⅣ高剂量组、AsⅣ中剂量组、AsⅣ低剂量组,每组15只。除正常对照组外,其余各组小鼠均腹腔注射1000 TCID50的 CVB3病毒液0.1 mL/只,建立VMC动物模型。接种病毒24 h时,AsⅣ高、中、低剂量组分别给予4、2、1 g/kg的AsⅣ灌胃,正常对照组、模型对照组每日予0.5%羧甲基纤维素钠20 mL/kg灌胃,各组均灌胃7 d,灌胃第8 d脱颈椎处死小鼠,取心肌组织,观察心肌组织病理学变化,全自动生化分析仪检测各组小鼠血清中LDH、CK-MB含量。结果与空白对照组比较,病毒对照组及AsⅣ组各亚组细胞OD值降低( P 均<0.05);与病毒对照组比较,及AsⅣ组各亚组细胞OD值降低( P 均<0.05)。与正常对照组比较,病毒对照组心肌细胞LDH、CK-MB含量升高( P 均<0.05);与病毒对照组比较,10、20 mg/L的AsⅣ组心肌细胞LDH、CK-MB含量降低( P 均<0.05)。与空白对照组比较,病毒对照组心肌组织排列紊乱,淋巴细胞和单核细胞出现介导的炎性浸润、心肌细胞出现明显出血水肿甚至坏死。AsⅣ组不同剂量心肌组织排列紊乱情况轻,淋巴细胞和单核细胞出现介导的炎性浸润、心肌细胞轻微出血水肿,心肌组织坏死以点状炎症和坏死灶为主。与空白对照组比较,模型对照组心肌细胞LDH、CK-MB含量升高( P 均<0.05);与模型对照组比较,AsⅣ高、中、低剂量组心肌细胞LDH、CK-MB含量降低( P 均<0.05)。结论 AsⅣ对CVB3感染的心肌细胞和VMC乳鼠心肌细胞均具有明显的保护作用,其机制可能为AsⅣ降低LDH、CK-MB含量。