生物过程的系统分析揭示了基因同表达模块驱动路径失调在阿尔茨海默氏症的疾病
Temitope Adeoye1, Syed I Shah1, Ghanim Ullah1
1Department of Physics, University of South Florida, Tampa, FL 33620.
bioRxiv : the preprint server for biology
|April 1, 2024
概括
阿尔茨海默病涉及复杂的基因相互作用. 系统方法揭示了超越差异性基因表达的细胞特异性干扰,突出了质细胞功能抑制和保存的神经元基因作用.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 系统生物学 系统生物学
背景情况:
- 阿尔茨海默氏病 (AD) 是一种复杂的病理,具有复杂的基因和生物过程相互作用.
- 传统的差异基因表达 (DEG) 分析不足以捕捉AD驱动的生物干扰的全谱.
研究的目的:
- 通过以系统为导向的方法,全面分析阿尔茨海默病中被破坏的生物过程.
- 通过整合途径和共同表达网络分析来确定AD相关生物过程的区域和细胞类型特定驱动因素.
- 超越以DEG为中心的分析,以更深入地了解AD的病原性.
主要方法:
- 利用来自死后脑样本的单核RNA测序数据 (中环,上额环,内腔皮层).
- 综合性通路活动分析与权重基因共同表达网络分析.
- 绘制基因相互连接的地图,并确定了特定细胞类型的基因模块和枢纽基因.
主要成果:
- 揭示了神经元和质细胞中显著的模块异质性,具有广泛的AD相关功能障碍.
- 同表达网络显示,星体细胞和微质细胞参与了超出神经炎症的过程,包括平衡,谷氨酸调节和TOR信号传递.
- 在失调的途径中发现了DEGs的有限表现,表明单独的DEG分析是不够的;观察到AD中的星细胞和微质模块的整体下调.
结论:
- 结合途径和网络分析的综合系统方法对于理解AD中的细胞类型特定基因作用至关重要.
- 只有差异基因表达分析可能不能完全代表AD的复杂性.
- 保存的神经元枢纽基因 (例如,CALM,HSP90家族) 驱动AD中的突触功能障碍,而质细胞显示功能抑制.
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