Mosaic loss of Chromosome Y in aged human microglia.

Mosaic loss of Chromosome Y in aged human microglia.
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DOI:
10.1101/gr.276409.121
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发表时间:
2022-10
期刊:
影响因子:
7
通讯作者:
Mostafavi S
Mostafavi S
中科院分区:
生物学1区
文献类型:
--
作者:
Vermeulen MC;Pearse R;Young-Pearse T;Mostafavi S

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Y染色体嵌合缺失(LOY)是老年男性白细胞中常见的获得性结构突变,与包括阿尔茨海默病(AD)在内的几种年龄相关疾病相关。LOY在脑细胞中的分子基础尚未得到系统的研究。在这里,我们对单细胞和单核RNA脑数据集进行了大规模分析,产生了851,674个细胞,以研究LOY的细胞类型特异性负担。LOY频率在供体和CNS细胞类型之间差异很大。在五种代表性较好的神经细胞类型中,LOY在小胶质细胞中富集,在神经元、星形胶质细胞和少突胶质细胞中罕见。在小胶质细胞中,LOY在AD受试者中显著富集。在小胶质细胞中的差异基因表达(DE)分析发现172个常染色体基因,3个X连锁基因,和10个假常染色体基因与LOY相关。据我们所知,我们提供了LOY在小胶质细胞中的第一个证据,并强调了其在衰老和神经退行性疾病(如AD)发病机制中的潜在作用。
Mosaic loss of Chromosome Y (LOY) is a common acquired structural mutation in the leukocytes of aging men that is correlated with several age-related diseases, including Alzheimer's disease (AD). The molecular basis of LOY in brain cells has not been systematically investigated. Here, we present a large-scale analysis of single-cell and single-nuclei RNA brain data sets, yielding 851,674 cells, to investigate the cell type–specific burden of LOY. LOY frequencies differed widely between donors and CNS cell types. Among five well-represented neural cell types, LOY was enriched in microglia and rare in neurons, astrocytes, and oligodendrocytes. In microglia, LOY was significantly enriched in AD subjects. Differential gene expression (DE) analysis in microglia found 172 autosomal genes, three X-linked genes, and 10 pseudoautosomal genes associated with LOY. To our knowledge, we provide the first evidence of LOY in the microglia and highlight its potential roles in aging and the pathogenesis of neurodegenerative disorders such as AD.
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