LISA2: Learning Complex Single-Cell Trajectory and Expression Trends.

LISA2: Learning Complex Single-Cell Trajectory and Expression Trends.
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DOI:
10.3389/fgene.2021.681206
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发表时间:
2021
影响因子:
3.7
通讯作者:
Ouyang Z
Ouyang Z
中科院分区:
生物学3区
文献类型:
--
作者:
Chen Y;Zhang Y;Li JYH;Ouyang Z

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单细胞转录和表观基因组学图谱已经被应用于各种组织和疾病中,以发现新的细胞类型、分化轨迹和基因调控网络。已经开发了许多方法,如Monocle 2/3、URD和STREAM,用于基于树的轨迹生成。在这里,我们提出了一种快速而灵活的轨迹学习方法LISA2,用于单细胞数据分析。这种新方法有两个明显的特点:(1)LISA2利用特定的叶片和根来降低建立发育轨迹的复杂性,特别是对于一些特殊情况,如稀有细胞群和相邻的末端细胞状态;(2)LISA2既适用于转录组学数据,也适用于表观基因组学数据。LISA2使用3D Landmark等距特征映射(L-ISOMAP)可视化复杂的轨迹。我们将LISA2应用于小脑、间脑和造血干细胞的模拟和真实数据集,包括单细胞转录数据和转座酶可访问的染色质数据的单细胞分析。LISA2可以有效地估计不同分子状态细胞的单细胞轨迹和表达趋势。
Single-cell transcriptional and epigenomics profiles have been applied in a variety of tissues and diseases for discovering new cell types, differentiation trajectories, and gene regulatory networks. Many methods such as Monocle 2/3, URD, and STREAM have been developed for tree-based trajectory building. Here, we propose a fast and flexible trajectory learning method, LISA2, for single-cell data analysis. This new method has two distinctive features: (1) LISA2 utilizes specified leaves and root to reduce the complexity for building the developmental trajectory, especially for some special cases such as rare cell populations and adjacent terminal cell states; and (2) LISA2 is applicable for both transcriptomics and epigenomics data. LISA2 visualizes complex trajectories using 3D Landmark ISOmetric feature MAPping (L-ISOMAP). We apply LISA2 to simulation and real datasets in cerebellum, diencephalon, and hematopoietic stem cells including both single-cell transcriptomics data and single-cell assay for transposase-accessible chromatin data. LISA2 is efficient in estimating single-cell trajectory and expression trends for different kinds of molecular state of cells.
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