Single chain variable fragment antibodies block aggregation and toxicity induced by familial ALS-linked mutant forms of SOD1.

Single chain variable fragment antibodies block aggregation and toxicity induced by familial ALS-linked mutant forms of SOD1.
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DOI:
10.1016/j.nbd.2013.04.007
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发表时间:
2013-08
影响因子:
6.1
通讯作者:
Roos RP
Roos RP
中科院分区:
医学1区
文献类型:
--
作者:
Ghadge GD;Pavlovic JD;Koduvayur SP;Kay BK;Roos RP

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大约10%的肌萎缩侧索硬化症(ALS)病例是具有常染色体显性遗传模式的家族性(称为FALS),约25%的FALS病例是由Cu/Zn超氧化物歧化酶(SOD1)突变引起的。有令人信服的证据表明,突变SOD 1(mtSOD 1)杀死运动神经元(MN),因为获得的功能毒性,最有可能与mtSOD 1的聚集。最近的一些报告表明,抗体可用于治疗mtSOD 1诱导的FALS。为了进一步研究抗体作为潜在治疗方法的应用,我们生成了针对SOD 1的可变区抗体(scFvs)的单链片段,然后将其表达为运动神经元细胞系内的“胞内抗体”。在本研究中,我们描述了分离的人单链抗体,干扰mtSOD 1在体外聚集和毒性。这些scFv可能在散发性ALS以及FALS中具有治疗潜力,因为散发性ALS也可能涉及SOD1蛋白或活性的异常。
Approximately 10% of amyotrophic lateral sclerosis (ALS) cases are familial (known as FALS) with an autosomal dominant inheritance pattern, and ~25% of FALS cases are caused by mutations in Cu/Zn superoxide dismutase (SOD1). There is convincing evidence that mutant SOD1 (mtSOD1) kills motor neurons (MNs) because of a gain-of-function toxicity, most likely related to aggregation of mtSOD1. A number of recent reports have suggested that antibodies can be used to treat mtSOD1-induced FALS. To follow up on the use of antibodies as potential therapeutics, we generated single chain fragments of variable region antibodies (scFvs) against SOD1, and then expressed them as ‘intrabodies’ within a motor neuron cell line. In the present study, we describe isolation of human scFvs that interfere with mtSOD1 in vitro aggregation and toxicity. These scFvs may have therapeutic potential in sporadic ALS, as well as FALS, given that sporadic ALS may also involve abnormalities in the SOD1 protein or activity.
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