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相关概念视频

B Cell Activation and Differentiation01:24

B Cell Activation and Differentiation

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The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
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The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
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相关实验视频

Updated: Jul 11, 2025

Induction and Assessment of Class Switch Recombination in Purified Murine B Cells
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sciCSR推断了B细胞状态过渡,并使用单细胞转录基因数据预测了类切换重组动态.

Joseph C F Ng1, Guillem Montamat Garcia2, Alexander T Stewart3

  • 1Department of Structural and Molecular Biology, Division of Biosciences and Institute of Structural and Molecular Biology, University College London, London, UK. joseph.ng@ucl.ac.uk.

Nature methods
|November 6, 2023
PubMed
概括

本研究介绍了sciCSR,这是一种用于分析单细胞RNA测序数据的B细胞成熟和类交换重组 (CSR) 的计算工具. sciCSR准确地预测了B细胞受体同型分布,为免疫反应提供了新的见解.

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科学领域:

  • 免疫学 免疫学 免疫学
  • 计算生物学 计算生物学
  • 基因组学就是基因组学.

背景情况:

  • 类交换重组 (CSR) 是B细胞成熟的一个关键过程,对于适应性免疫来说至关重要.
  • 在单细胞水平上分析CSR动态,可以更深入地了解B细胞发育和免疫反应.
  • 目前从单细胞RNA测序 (scRNA-seq) 数据分析CSR的方法存在局限性.

研究的目的:

  • 开发和验证sciCSR,一种新的计算管道,用于从scRNA-seq数据中推断CSR事件和动态.
  • 为准确的CSR分析区分生产性免疫球蛋白重链转录与生殖系转录.
  • 用马尔科夫状态模型建模B细胞的CSR动态.

主要方法:

  • sciCSR管道重新分析scRNA-seq对齐以区分生产性和生殖免疫球蛋白转录.
  • 从scRNA-seq数据构建一个马尔科夫状态模型,以推断CSR动态和方向.
  • 该管道使用模拟数据和来自SARS-CoV-2疫苗接种时间过程实验的真实scRNA-seq数据进行验证.

主要成果:

  • sciCSR准确地区分生产性和生殖免疫球蛋白转录.
  • 计算管道成功地预测了B细胞受体同型分布的高准确度 (共小数相似度~0.9) 从早期的时间点.
  • sciCSR识别了B细胞特异性转换,这些转换被传统的RNA速度分析遗漏了.

结论:

  • sciCSR是一种经过验证的计算工具,用于分析B细胞中的CSR事件和动态,使用scRNA-seq.
  • 该管道提供同型分布的准确预测,有助于了解免疫反应.
  • sciCSR增强了B细胞成熟和CSR的分析,为免疫力学提供了新的见解.