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在物种划分方面应用了遗传学方法,以区分B细胞克隆家族

Katalin Voss¹, Katrina M Kaur², Rituparna Banerjee³

¹Department of Quantitative and Computational Biology, University of Southern California, Los Angeles, CA, United States.

Frontiers in immunology

|December 17, 2024

概括

一种新的遗传学方法可以准确地识别B细胞克隆家族,而不需要生殖系参考集. 这种方法即使在非模型系统中也有效,为研究适应性免疫力学提供了强大的工具.

科学领域:

免疫学免疫学免疫学
计算生物学计算生物学
进化生物学进化生物学

背景情况:

适应性免疫依赖于由V(D) J重组和体质突变产生的B细胞受体 (BCR).
抗原特异性B细胞的克隆扩张创造了进化动态,需要识别来自同一祖先重组事件 (克隆家族) 的BCR.
目前用于识别克隆家族的方法通常依赖于生殖系参考集,在具有有限已知等位基因多样性的非模型生物中提出挑战.

研究的目的:

开发和验证一种新的,从遗传学上明确的方法来界定B细胞克隆家族.
评估该方法的性能,特别是在缺乏生殖系参考数据的场景中.
为了证明一般的遗传学工具的适用性,用于分析B细胞谱系动态.

主要方法:

对样本内的所有B细胞序列的遗传树的重建.
应用多速率Poisson Tree Processes (mPTP) 的物种划分算法来识别克隆家族.
进行了广泛的模拟,以评估在各种条件下的性能,包括没有参考等位基因.
对实证B细胞数据集的分析.

主要成果:

遗传学上明确的mPTP方法准确地界定了B细胞克隆家族,即使没有生殖系参考集.
性能可与最先进的B细胞特异性方法相提并论,当有一个完整的参考集可用时.
该方法在经验数据集上显示了与领先技术相似的性能.
遗传学推断是B细胞在非模型系统中的克隆动态的一个可行的策略.

结论:

现成的遗传学技术,如mPTP,对于分析B细胞的克隆动态非常有效,特别是在非模型系统中.
这种基因组学上明确的方法为取决于映射的方法提供了一个强大的替代方案.
将基因推理与基于映射的方法相结合,可以在模型和非模型系统中增强推理的稳定性.

关键词:

在AIRR-seqq.B细胞克隆家族划界方法乙细胞受体谱B细胞受体谱基准测试 (benchmarking) 是一种比较的方法.身体上的超突变.种类划分种类划分

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