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相关概念视频

Cell Lines01:16

Cell Lines

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A cell line is a population of cells grown in vitro that can be subcultured over several generations. Normal cells cease to divide after a certain number of cell divisions, a process known as replicative senescence. This number, called the Hayflick limit, was conceptualized by Leonard Hayflick in 1961 when he observed that fetal cells grown in culture could only divide 40-60 times. This limit is due to the shortening of the telomeres during each round of cell division, preventing cell division...
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A Combinatorial Single-cell Approach to Characterize the Molecular and Immunophenotypic Heterogeneity of Human Stem and Progenitor Populations
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单细胞参考映射用于构建和扩展细胞类型层次结构.

Lieke Michielsen1,2,3, Mohammad Lotfollahi4,5, Daniel Strobl4,6

  • 1Department of Human Genetics, Leiden University Medical Center, 2333ZC Leiden, The Netherlands.

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|July 28, 2023
PubMed
概括
此摘要是机器生成的。

整合单细胞基因组学数据集需要协调细胞类型注释. 我们的treeArches框架构建了具有层次细胞注释的动态参考地图,使得共识和发现新的细胞状态成为可能.

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科学领域:

  • 计算生物学是一种计算生物学.
  • 基因组学就是基因组学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 单细胞基因组学产生了大量的数据集,用于健康和疾病地图.
  • 整合这些数据集受到不同的单元注释术语和深度的挑战.
  • 现有的参考映射方法缺乏对细胞类型注释的系统协调.

研究的目的:

  • 开发一个用于自动构建和扩展参考地图的框架.
  • 通过可更新的,跨数据集的层次细胞类型注释来丰富地图集.
  • 为了实现基于共识的细胞类型注释和发现新细胞状态.

主要方法:

  • 介绍"treeArches",一个新的计算框架.
  • 自动构建和扩展参考地图集.
  • 来自多个数据集的细胞类型注释的层次组织.

主要成果:

  • 证明了用于解决参考和查询数据集之间的单元类型关系的用例.
  • 成功识别了新的细胞类型,包括与疾病相关的细胞状态,在参考中缺席.
  • 建立了一种数据驱动的构建共识单元类型层次结构的方法.

结论:

  • 树木Arches 方便创建全面的,协调的单细胞参考地图.
  • 该框架支持识别新的细胞类型和状态.
  • 能够有效地使用和扩展生物发现的参考地图集.