在基于细胞的查中发现的新型β-glucocerebrosidase chaperone化合物减少了iPS衍生的神经元细胞中病理积累的葡萄糖氨酸
Yusuke Naito1, Sou Sakamoto1, Takuto Kojima1
1Neuroscience Drug Discovery Unit, Research, Takeda Pharmaceutical Company Limited, Japan.
SLAS discovery : advancing life sciences R & D
|June 27, 2023
概括
研究人员确定了新的小分子化合物,它们作为药理伴侣来增强β-葡萄糖脑酶 (GCase) 活性. 这些化合物有望通过减少大脑中有毒脂质积累来治疗神经学氏病.
科学领域:
- 生物化学 生物化学
- 遗传学 遗传学 是一个
- 神经科学是一个神经科学.
背景情况:
- 氏病 (GD) 是由GBA1基因突变引起的,导致β-葡萄糖核糖酶 (GCase) 功能受损以及像葡萄糖胺 (GlcCer) 和葡萄糖素 (GlcSph) 等脂质的积累.
- 神经性GD尤其具有挑战性,因为目前的疗法不能有效地将GCase输送到中枢神经系统.
- 开发穿透大脑的小分子药理伴侣对于治疗神经性GD至关重要.
研究的目的:
- 确定可以增强中枢神经系统中GCase活性的新型小分子化合物.
- 研究这些化合物的作用机制及其在神经GD模型中减少基质积累的有效性.
主要方法:
- 利用基于细胞的查试验,使用光标记的GCase自杀抑制剂 (MDW933) 在L444P突变的GD患者的纤维细胞中.
- 使用细胞透基质进行了二次测定,以确认GCase增强.
- 产生诱导多能干细胞 (iPSC) 衍生的多巴胺基神经元,具有GBA1 L444P突变,以评估在相关神经学背景下对GlcSph水平的复合效应.
主要成果:
- 鉴定出新型化合物,其剂量取决于增加光信号,表明L444P突变细胞中增强的GCase活性.
- 证实这些化合物增强了 lysosomal GCase L444P 的活性,并增加了总的 GCase L444P 蛋白质水平,这表明了伴侣类机制.
- 从GBA1 L444P突变模型中证明,鉴定到的化合物有效地减少了来自iPSC的多巴胺基神经元中的病态GlcSph积累.
结论:
- 这些已识别的化合物作为GCase的强有力的药理伴侣,增强其活性和稳定性.
- 这些新型化合物通过清除大脑中积累的基质来显示神经学高氏病的治疗潜力.
- 这项研究为开发有效治疗GD神经表现的治疗提供了有希望的途径.
相关概念视频
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EPS and iPS Cells in Disease Research
Embryonic and induced pluripotent stem cells are excellent models for disease research because of their ability to self-renew and differentiate into most cell types. Somatic cells from a patient are isolated and reprogrammed into induced pluripotent stem cells or iPSCs. These iPSCs are later differentiated into the desired cell type, which mirrors the diseased cell of the patient. In this way, disease models have been created for investigating diseases such as Down syndrome, type I diabetes,...


