Differential nuclear localization of complexes may underlie in vivo intrabody efficacy in Huntington's disease.

Differential nuclear localization of complexes may underlie in vivo intrabody efficacy in Huntington's disease.
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DOI:
10.1093/protein/gzu041
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发表时间:
2014-10
期刊:
Protein engineering, design & selection : PEDS
影响因子:
--
通讯作者:
Messer A
Messer A
中科院分区:
其他
文献类型:
--
作者:
Butler DC;Snyder-Keller A;De Genst E;Messer A

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胞内抗体为操纵触发神经退行性疾病的蛋白质错误折叠提供了有吸引力的选择。在亨廷顿氏病中,亨廷顿蛋白外显子1的极端N-末端区域中的扩展的多聚谷氨酰胺束错误折叠,使用略微不同的方法选择了两个针对相邻肽的前导胞内抗体。两者均有效防止瞬时共转染测定中报告片段的聚集。然而,在颅内递送至突变小鼠脑后,主要定位于细胞核的VL12.3似乎加速突变表型,而主要位于细胞质的C4 scFv显示部分表型校正。这种比较突出了可以为多种蛋白质抑制性疾病的体内治疗提供信息的参数。
Intrabodies offer attractive options for manipulating the protein misfolding that triggers neurodegenerative diseases. In Huntington's disease, where the expanded polyglutamine tract in the extreme N-terminal region of huntingtin exon1 misfolds, two lead intrabodies have been selected against an adjacent peptide, using slightly different approaches. Both are effective at preventing aggregation of a reporter fragment in transient co-transfection assays. However, after intracranial delivery to mutant mouse brains, VL12.3, which is mainly localized to the nucleus, appears to accelerate the mutant phenotype, while C4 scFv, which is largely cytoplasmic, shows partial phenotypic correction. This comparison highlights parameters that could inform intrabody therapeutics for multiple proteostatic diseases.
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