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lysosomal sialidase NEU1,其细胞内特性,缺乏,以及作为治疗剂的使用

Kohji Itoh¹, Jun Tsukimoto²

¹Department of Medicinal Biotechnology, Institute for Medicinal Biotechnology, Graduate School of Pharmaceutical Sciences, Tokushima University, Tokushima, Japan. kitoh@tokushima-u.ac.jp.

Glycoconjugate journal

|December 26, 2023

概括

神经氨基酶1 (NEU1) 缺乏导致溶解体储存疾病,如 Sialidosis 和 Galactosialidosis. 在这些条件下开发了一种修改后的NEU1 (modNEU1) 蛋白质,用于潜在的基因治疗.

科学领域:

生物化学生物化学
遗传学遗传学是一种遗传学.
分子生物学分子生物学

背景情况:

神经氨基酶1 (NEU1) 是一种溶解体的化酶,对降解化糖具有至关重要的作用.
NEU1需要与cathepsin A (CTSA) 结合,才能进行 lysosomal 的运输和激活.
在NEU1或CTSA中发生的突变,分别会引起状体病 (SiD) 和状体病 (GS),导致溶酶体储存障碍.

研究的目的:

为了建立一个新的小鼠模型Galactosialidosis (GS) 展示关键疾病表型.
开发一种能够进行 lysosomal 运输和功能的修饰 NEU1 (modNEU1) 蛋白质.
为在体内基因疗法奠定基础,使用腺相关病毒 (AAV) 载体用于SiD和GS.

主要方法:

产生了一种具有特定Ctsa突变的新型GS小鼠模型,导致部分表突跳转和Ctsa/Neu1综合缺乏.
开发一种改性NEU1 (modNEU1) 蛋白质,以防止自我聚合.
使用双促进子控制的AAV向量用于modNEU1和CTSA的共同表达.

主要成果:

该GS小鼠模型重复了人类的GS症状,包括发作,行为变化和神经状糖积累.
当 modNEU1 蛋白与 CTSA 共同表达时,它被成功地运送到溶酶体,从而避免了 RER 结晶.
这项研究为开发AAV介导的基因疗法为NEU1缺陷溶酶体储存疾病提供了基础.

结论:

新的GS小鼠模型对于研究疾病机制和测试治疗干预措施非常有价值.
modNEU1代表了与NEU1相关的溶酶体储存疾病的有前途的治疗候选者.
基于AAV的基因治疗有可能通过提供功能性的NEU1和CTSA来治疗 Sialidosis 和 Galactosialidosis.

关键词:

在 Galactosialidosis 中使用.基因治疗是一种基因疗法.溶酶体储存障碍溶酶体储存障碍缺乏 Neu1/Ctsa 的小鼠.蛋白质结晶的过程中的蛋白质结晶.化酸是一种化物.这是一种化剂 (sialidosis).基甘氨酸 (Sialylglycans) 是一种

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