过度表达TFEB可缓解由progranulin不足引起的自-溶酶缺陷
Wren O Nader1, Kaylan S Brown1, Nicholas R Boyle1
1Killion Center for Neurodegeneration and Experimental Therapeutics, Alzheimer's Disease Center, Evelyn F. McKnight Brain Institute, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA.
进子素 (GRN) 突变通过损害 lysosomal 功能导致前性痴呆症 (FTD). TFEB激活有助于纠正这些缺陷,这表明基于溶酶体的疗法可以治疗GRN相关的FTD.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 进激素 (GRN) 缺乏是前性痴呆症 (FTD) 的主要遗传原因.
- GRN突变导致溶酶体功能障碍和大脑中存储物质的积累.
- 转录因子TFEB调节 lysosomal 和 autophagy 基因,并且可能参与 FTD 病变发生.
研究的目的:
- 研究TFEB在GRN缺陷的细胞和动物模型中的作用.
- 确定TFEB激活是否可以改善与GRN突变相关的溶酶体缺陷.
主要方法:
- 生成的GRN淘汰赛 (KO) HEK-293细胞.
- 在GRN KO细胞中过度表达的TFEB.
- 注射表达Tfeb的腺相关病毒 (AAV) 进入Grn淘汰赛小鼠的体质层.
主要成果:
- GRN KO细胞显示TFEB核局部化和 lysosomal转录的增加,但自功能受损.
- 在GRN KO细胞中过度表达TFEB使自细胞正常化,并增加了 lysosomal转录.
- 在Grn淘汰赛小鼠中注射AAV-TFEB减少了 lysosomal存储物质和增加了 lysosomal转录.
结论:
- 激活TFEB可以缓解无原蛋白缺乏模型中的自-溶酶体缺陷.
- 针对TFEB的基于lysosome的治疗策略可能对治疗GRN相关的前性痴呆有益.
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