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Ann Clin Transl Neurol:有效治疗ALS的新组合疗法

2014-11-28 佚名 生物谷

肌萎缩性侧索硬化症(ALS)也称为葛雷克氏症,是一种神经退行性疾病,主要杀死运动神经元,导致瘫痪和死亡。目前ALS无法治愈,大部分开发ALS的药物在实验过程中都失败了。 在发表于11月20日的Annals of Clinical and Translational Neurology杂志上的研究中,研究人员表明,大脑泵出毒素的能力在ALS患者中增强,而且大脑的这种能力还泵出治疗ALS的药物,从而

肌萎缩性侧索硬化症(ALS)也称为葛雷克氏症,是一种神经退行性疾病,主要杀死运动神经元,导致瘫痪和死亡。目前ALS无法治愈,大部分开发ALS的药物在实验过程中都失败了。

在发表于11月20日的Annals of Clinical and Translational Neurology杂志上的研究中,研究人员表明,大脑泵出毒素的能力在ALS患者中增强,而且大脑的这种能力还泵出治疗ALS的药物,从而降低了药物疗效。研究工作表明,当这些泵被阻断,治疗ALS药物在小鼠模型中变更加有效,疾病变得进展减慢。

这种大脑泵出机制通常可以保护大脑和脊髓避免环境毒素的损伤,也会把治疗药物泵出,因此研究提示阻断泵或转运蛋白提高了ALS药物效果。

在早期发表的研究中,研究小组显示在小鼠中,该泵随着疾病的进展功能会发生改变,在症状变得更加严重后泵变得更加活跃。为了解决这个问题,研究人员在ALS小鼠模型中使用已经批准用于治疗ALS的药物利鲁唑和泵阻滞剂(elacridar)组合。

先前的工作已经表明,随着患者病情的发展该药物失去有效性。药物仅延长ALS患者生存期3-6个月。研究人员选择利鲁唑开展动物研究,因为他们知道利鲁唑与两个耐药泵即P-糖蛋白(P-gp)和乳腺癌耐药蛋白BCRP相互作用。

用ALS药物(利鲁唑)和泵阻滞剂(elacridar)组合疗法处理小鼠,结果发现与那些只用利鲁唑治疗小鼠相比,该组合能更好的延长小鼠寿命。

原始出处

Michael R. Jablonski,et al. Inhibiting drug efflux transporters improves efficacy of ALS Therapeutics.Ann Clin Transl Neurol.2014 

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    2015-01-18 bsmagic9140
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    2015-09-13 yinhl1978
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