多基因衍生细胞类型特定的阿尔茨海默病多基因风险评分
Nicholas O'Neill1, Nuzulul Kurniansyah1, Congcong Zhu2
1Bioinformatics Program, Boston University, Boston, MA, USA; Departments of Medicine (Section of Biomedical Genetics), Boston University Chobanian & Avedisian School of Medicine, Boston, MA, USA.
Neurobiology of aging
|July 24, 2025
概括
使用单核ATAC-seq数据构建的阿尔茨海默病多基因风险评分 (ADPRS) 显示出比单核RNA-seq.的细胞类型特异性更高的细胞类型特异性. 这些分数将特定的细胞类型 (如星体细胞和微质细胞) 与AD内类型联系起来,NPY变异与SST+GABAergic神经元ADPRS密切相关.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 计算生物学 计算生物学
背景情况:
- 阿尔茨海默氏症 (AD) 病原体涉及复杂的遗传因素,影响大脑中的各种细胞类型.
- 多基因风险评分 (PRS) 是解剖复杂疾病的遗传贡献的宝贵工具.
- 细胞类型特异性PRS (ct-PRS) 可以为了解疾病机制提供更高的分辨率.
研究的目的:
- 使用单核RNA-seq (snRNA) 和单核ATAC-seq (snATAC) 数据开发和比较细胞类型特定的阿尔茨海默病多基因风险得分 (ct-ADPRS).
- 为了研究这些ct-ADPRSs的细胞类型特异性.
- 将ct-ADPRS与AD内类型关联起来,包括tau纠负担,神经质斑块负担和认知分数.
主要方法:
- 衍生ct-ADPRSs利用来自snRNA的细胞类型特定基因附近的遗传变异和来自snATAC的可访问的染色体区域.
- 为八种神经元亚型生成了一个多原子ct-ADPRS.
- 通过计算ct-ADPRSs之间的相关性来评估细胞类型特异性.
- 使用后勤和线性回归模型评估了与AD内类型的关联.
主要成果:
- 与snRNA衍生的ct-ADPRS相比,snATAC衍生的ct-ADPRS表现出明显较低的细胞间类型相关性 (平均r=0.071) (平均r=0.19),表明细胞类型特异性优越.
- 与天体细胞 (AST) 和微质细胞 (MIC) ct-ADPRS 来自 snATAC 和 snRNA 的 Tau 纠负担相关.
- 来自snATAC的AST ct-ADPRS与迷你精神状态考试成绩有独特的关联.
- SST+ GABAergic神经元ct-ADPRS与神经性斑块负担密切相关,并且是唯一与AD内类型有显著联系的神经元亚型ct-ADPRS.
- 神经Y (NPY) 基因的上游变体,特别是rs3940268,显示出与SST+GABAergic神经元ct-ADPRS最强的关联.
结论:
- 来自snATAC的ct-ADPRSs为剖析AD遗传结构提供了增强的细胞类型特异性.
- 特定的细胞类型,包括星球细胞,微质细胞和SST+GABAergic神经元,在AD病理学中起着不同的作用.
- 靠近NPY基因的遗传变异可能通过它们对SST+GABAergic神经元的影响显著影响AD风险.
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