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DJ-1保护细胞死亡免受由GBA1缺乏引起的线粒体氧化应激

Younwoo Nam^1,2, Jiyeon Na², Shi-Xun Ma^3,4

¹Department of Biology, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.

Genes & genomics

|March 9, 2024

概括

葡萄糖大脑化酶 (GBA1) 缺乏会提高DJ-1的调节,DJ-1是一种保护性蛋白质,可以抵抗氧化应激. 损坏的DJ-1功能可能会使得GBA1突变的帕金森病患者的多巴胺基神经元存活率恶化.

科学领域:

神经科学是一个神经科学.
遗传学遗传学是一种遗传学.
细胞生物学细胞生物学

背景情况:

葡萄糖脑蛋白酶 (GBA1) 突变是帕金森病 (PD) 的主要遗传风险因素.
GBA1缺乏可能会增加PD的进展,但潜在的细胞机制仍然不清楚.
线粒体功能障碍与PD病变发生有关.

研究的目的:

在线粒体功能障碍和氧化应激的背景下,研究GBA1缺乏和DJ-1之间的遗传相互作用.
阐明DJ-1在细胞对GBA1缺乏的反应中的作用.

主要方法:

利用GBA1淘汰 (KO) SH-SY5Y细胞来研究DJ-1对抗氧化应激的功能.
使用MitoSOX.测量了细胞反应性氧物种 (ROS).
通过qRT-PCR分析了PARK7 (DJ-1) 基因表达.
给GBA1KO细胞使用ROS抑制剂 (N-乙囊) 和葡萄糖胺合成酶抑制剂 (miglustat).
评估了Gba1 L444P异构卵性小鼠与Park7淘汰赛小鼠交叉的多巴胺基性退化.

主要成果:

在转录水平 (PARK7 mRNA) 上,DJ-1 在GBA1 KO细胞中显著升级.
GBA1 KO细胞表现出ROS水平的增加和抗氧化基因和蛋白质的增强表达.
GBA1 KO细胞对H2O2诱导的细胞死亡的敏感性增加.
结合Gba1和Park7缺陷的小鼠显示中脑多巴胺基神经元减少和轻度运动缺陷.

结论:

在GBA1缺乏症中,DJ-1的升高调节对抗氧化应激起着保护作用.
DJ-1的保护机制涉及转录调节和抗氧化反应.
功能障碍的DJ-1可能会对患有帕金森病的GBA1突变载体的多巴胺基神经元存活产生负面影响.

关键词:

在DJ-1中,DJ-1是DJ-1.在GBA1缺陷中,GBA1的缺陷氧化应激是一种氧化应激.帕金森病是帕金森氏症的一种疾病.

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