首页 理论教育 干扰对肌萎缩侧索硬化症动物模型神经变性的阻止

干扰对肌萎缩侧索硬化症动物模型神经变性的阻止

时间:2022-02-11 理论教育 版权反馈
【摘要】:使用干扰RNA抑制SOD1,可延迟小鼠ALS的发作和进展。图13-9 RNA干扰可阻止肌萎缩侧索硬化症动物模型的神经变性总之,随着RNAi机制研究的深入和RNAi技术的日趋完善,RNAi已经便捷实用地应用于基因组功能的研究,对基础和临床医学研究已有令人鼓舞的前景。
干扰对肌萎缩侧索硬化症动物模型神经变性的阻止_分子医学导论

五、RNA干扰对肌萎缩侧索硬化症动物模型神经变性的阻止

过度表达突变型超氧化物歧化酶(SOD1)的转基因小鼠有与人类肌萎缩侧索硬化症(ALS)类似的进行性麻痹表型。使用干扰RNA抑制SOD1,可延迟小鼠ALS的发作和进展。使用慢病毒载体转移该突变的SOD1为靶标的短干扰RNA,将此载体介导SOD1突变体为靶标的干扰RNA,突变小鼠的肌肉内注入此载体,ALS症状发作从平均94d延迟到202d(P<0.001),受治小鼠SOD1蛋白水平也下降了40%,即使小鼠进展为无力或不能活动,也无SOD1小鼠中可见的严重的后肢功能障碍和体重减轻,生存时间从128d延长到228d(P<0.001)(图13-9)。

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图13-9 RNA干扰可阻止肌萎缩侧索硬化症动物模型的神经变性

总之,随着RNAi机制研究的深入和RNAi技术的日趋完善,RNAi已经便捷实用地应用于基因组功能的研究,对基础和临床医学研究已有令人鼓舞的前景。

(王跃祥 宋后燕)

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