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脑转录组变化与蛋白质O-GlcNAcylation急剧增加相关,以及神经退行性疾病的影响

Margaret B Bell¹, Mariame S Kane¹, Xiaosen Ouyang¹

¹Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama, USA.

Journal of neurochemistry

|January 17, 2025

概括

抑制O-GlcNAcase (OGA) 增加了O-GlcNAcylation,可能治疗阿尔茨海默病 (AD). 用Thiamet G (TG) 的急性治疗改变了基因表达,揭示了对AD和衰老相关的途径的影响.

科学领域:

神经科学是一个神经科学.
生物化学生物化学
基因组学就是基因组学.

背景情况:

药理上抑制O-GlcNAcase (OGA) 增强了蛋白质O-GlcNAcylation,这是阿尔茨海默病 (AD) 探索的一种策略,以减少tau和粉样β病理.
了解增加O-GlcNAcylation的广泛影响对于评估OGA抑制剂作为神经退行性疾病治疗药物至关重要.

研究的目的:

在正常小鼠中使用Thiamet G (TG) 调查OGA抑制对大脑转录组的急性影响.
为了识别由急性OGA抑制引起的基因表达特征和受影响的途径.

主要方法:

正常的小鼠接受了OGA抑制剂Thiamet G (TG) 或盐水治疗3小时.
使用NovaSeq PE 150进行了全脑mRNA测序,以分析差异性基因表达.
使用定量PCR (qPCR) 验证特定基因表达的变化,例如AMPK子单元Prkab2.

主要成果:

与盐水相比,TG治疗导致1234个显著差异地表达的基因.
上调的基因在通常在AD下调的路径中得到丰富,而下调的基因包括细胞粘附路径和通常在AD和衰老中上调的基因.
无论是急性还是慢性TG治疗,都显示出蛋白自酸化和激酶活性通路的升高调节,以及细胞粘附和星细胞标记物的降低调节. 线粒体基因在急性和慢性治疗之间显示了相反的趋势.

结论:

由TG引起的急性OGA抑制显著改变了大脑的转录组,影响了与AD和衰老相关的途径.
该研究强调了OGA抑制剂对生物能量的潜在下游影响,这可能会影响它们在AD治疗中的疗效.
研究结果提供了关于OGA抑制机制及其在治疗神经退行性疾病方面的潜在局限性的见解.

关键词:

阿尔茨海默病的疾病阿尔茨海默病的疾病.O-GlcNAccc 的使用情况.在RNAseqqq中使用.代谢过程中的代谢.

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