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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近日,梅奥诊所与斯克里普斯研究所研究人员,已经制定了新治疗策略,用于打击那些引发神经退行性疾病肌萎缩侧索硬化(ALS或卢伽雷氏病)和额颞叶痴呆(FTD)疾病的最常见遗传风险因子。相关研究发表在Neuron杂志上,新研究也发现了潜在生物标志物,来跟踪疾病的进展和治疗功效。科学家开发出一种小分子化合物,可以防止因C9ORF72基因突变引起的异常细胞过程。这项发现是在梅奥诊所先前研究成果基础上获得的,先

Neuron:新发现的TUBA4A 基因变异与家族性 ALS 相关

肌萎缩性侧索硬化症 (ALS)也称葛雷克氏症,是一种神经退行性疾病,其特征是中枢神经系统中的运动神经元逐渐死亡,最终导致受这些病变神经元控制的肌肉功能永久丧失以及人体彻底瘫痪。导致 ALS 的原因尚不得而知,但有 5-10% 的病例显然是由遗传引起。家族性 ALS 具有基因异质性,迄今为止已确认约有十多个基因可引发这种疾病或与其有关。近来流行的“冰桶挑战”的目的就是增进人们对这种疾病的了解,并鼓励