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首页> 外文期刊>Molecular and Cellular Biology >Enhancement of cytotoxicities of ricin and Pseudomonas toxin in Chinese hamster ovary cells by nigericin.
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Enhancement of cytotoxicities of ricin and Pseudomonas toxin in Chinese hamster ovary cells by nigericin.

机译:黑色素增强中国仓鼠卵巢细胞中蓖麻毒素和假单胞菌毒素的细胞毒性。

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摘要

Nigericin and monensin, ionophores for Na+ and K+, have been found to enhance the cytotoxicities of abrin, ricin, and Pseudomonas aeruginosa exotoxin A in Chinese hamster ovary (CHO) cells. They do not affect the cytotoxicity of diphtheria toxin in the same cell line. Maximal sensitization of the CHO cells toward ricin and Pseudomonas toxin requires preculture of CHO cells in the presence of nigericin. Inhibition of protein synthesis in CHO cells by ricin or Pseudomonas toxin is also enhanced by preculture of CHO cells in the presence of nigericin. These results suggest a common step in the intoxication process of ricin and Pseudomonas toxin, the rate of which is facilitated by pretreatment with nigericin. This step is, however, not shared by the intoxication of CHO cells with diphtheria toxin.
机译:尼日尔和莫能菌素(Na +和K +的离子载体)已被发现能增强中国仓鼠卵巢(CHO)细胞中abrin,蓖麻毒蛋白和铜绿假单胞菌外毒素A的细胞毒性。它们不影响同一细胞系中白喉毒素的细胞毒性。 CHO细胞对蓖麻毒素和假单胞菌毒素的最大敏感性要求在尼日菌存在下对CHO细胞进行预培养。蓖麻毒素或假单胞菌毒素在CHO细胞中对蛋白质合成的抑制作用还可以通过在尼日利亚菌素存在下对CHO细胞进行预培养来增强。这些结果表明蓖麻毒蛋白和假单胞菌毒素的中毒过程中的一个共同步骤,尼日尔霉素预处理可加快其发生率。但是,白喉毒素对CHO细胞的中毒并不共有该步骤。

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