在固定在甲中的氨酸嵌入组织中,染色质可访问性的空间概况
Pengfei Guo1, Yufan Chen2, Liran Mao3,4,5
1Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. pengfei.guo@pennmedicine.upenn.edu.
Nature communications
|July 2, 2025
概括
一种新的空间表观基因组技术,FFPE-ATAC-seq,分析了已存档的甲固定嵌 (FFPE) 组织中的染色质可访问性. 这种方法在完整组织中绘制基因调节和细胞类型的地图,从而释放出巨大的研究潜力.
科学领域:
- 表观基因组学是指表观基因组学.
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 甲固定嵌 (FFPE) 组织丰富,但由于有限的分子工具,在表观遗传学研究中未得到充分利用.
- 现有的方法难以分析FFPE样本中的染色质可访问性,同时保留空间信息.
研究的目的:
- 引入空间FFPE-ATAC-seq,这是一个新的方法,用于在存档的FFPE组织中进行in situ染色质可访问性分析.
- 为了克服与高分辨率表观基因组分析的形式因子交叉连接相关的挑战.
主要方法:
- 空间FFPE-ATAC-seq是为了直接在FFPE组织段内描述染色质可访问性而开发的.
- 该方法应用于小鼠和人类组织 (大脑,胸腺) 和人类黑色素瘤样本.
- 与单细胞RNA测序 (scRNA-seq) 的整合用于验证.
主要成果:
- 空间FFPE-ATAC-seq成功地绘制了高分辨率的染色质景观,保留了组织结构.
- 在各种组织中确定了不同的细胞类型和空间组织,与形态学保持一致.
- 该方法精确识别了细胞类型和调控元素,通过scRNA-seq集成进行验证.
- 在人黑色素瘤的瘤和非瘤区域中,染色素可访问性得到了全面的特征.
结论:
- 空间FFPE-ATAC-seq显著扩大了对存档的FFPE样本进行表观遗传学研究的工具包.
- 该方法使得基因调节和疾病机制的研究能够在前所未有的空间背景下进行.
- 这种方法释放了FFPE庞大的档案的潜力,以便在各种生物和疾病背景下进行发现.
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