维生素C、E对柯萨奇B_3病毒感染的心肌细胞的保护作用

目的 探讨抗氧化剂维生素C、E在治疗病毒性心肌炎过程中的重要作用。方法 体外培养乳鼠心肌细胞,分别在感染柯萨奇B3 病毒前后加入一定浓度的维生素C、E及其合剂,待病毒对照组细胞病变达+ + + +时,以MTT法测定细胞存活率,应用全自动生化分析仪测定细胞上清液中的心肌酶活性。结果 实验组的细胞存活率明显高于病毒对照组,心肌酶活性明显低于病毒对照组。结论 维生素C、E对病毒感染的心肌细胞具有一定的保护作用,联合使用的效果明显优于单独使用。

柯萨奇B_3病毒感染的受体学进展

最近相继揭示了柯萨奇 B3 病毒 (CVB3 )感染的细胞受体 ,本文对其结构、功能及与病毒的作用机制作一综述。

双黄连抗柯萨奇B_3型病毒感染大鼠原代心肌细胞的效应

目的 观察双黄连抗柯萨奇B3 病毒感染原代大鼠心肌细胞的作用 ,并初步探讨其机制。方法 选用出生 1～ 3天的Sprague Dawley大鼠 ,取其心室肌组织 ,制备原代大鼠心肌细胞 ,培养 72h后 ,用不同浓度的双黄连对抗10 0TCID50 柯萨奇B3 型病毒感染细胞 ,观察细胞病变 ,测定感染 36h后细胞上清液中的病毒滴度及肌酸磷酸激酶。结果 0 5、0 2 5、0 12 5 g/L双黄连均可明显减轻心肌细胞病变 ,降低细胞上清液的病毒滴度 ,减少感染心肌细胞肌酸磷酸激酶的释放 (分别和病毒对照组相比 ,P <0 0 1)。结论 双黄连对柯萨奇病毒感染的新生大鼠原代心肌细胞有保护作用。

EFFECT OF VERAPAMIL ONCa^（2＋） INFLUX ANDCVB3－RNA REPLICATION IN CULTURED NEONATALRAT HEART CELLS INFECTED WITH CVB3

The effect of verapamil on Ca2+ influx across the myocardial plasma membrane and coxsackie virus B3 ( CVB3)-RNA replication in cultured neonatal rat heart cells infected with CVB3 was investigated. It was found that the Ca2+ influx could be inhibited significantly (P<O. 01) by verapamil (1 μmol/L) after infection of heart cells for 48h. However, when the cultured heart cells infected with CVB3 and treated with verapamil (Iμmol/L and 10 nmo/L) at the same time for 48h, the amounts of CVB3-RNA in myocytes were significantly higher than that in infected control group (P<O. 05). These phenomena suggest that the increase of Ca2+ influx of cultured heart cells infected with CVB3 could be inhibited by some calcium antagonists, e. g. verapamil at the early stage. On the other hand, verapamil might accelerate viral replication in myocardium. Thus, although verapamil could be beneficial for decreasing the secondary Ca2+ damages and improve the myocardial electric activity, it isn’t a sensible choice for therapy in early stage of virus infection with cardiac symptoms.

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