使用spa-ChIPseq的自动化染色体分析揭示了条件变化的影响
Yuwei Cao1,2, Lauren Patel1,3, Lauren Alcoser4
1Department of Medicine, Division of Genomics & Precision Medicine, University of California San Diego, La Jolla, CA.
bioRxiv : the preprint server for biology
|September 2, 2025
概括
我们开发了一种完全自动化的单染色体免疫沉法,其次是测序 (ChIP-seq) 协议. 这种可扩展的spa-ChIP-seq方法显著减少了分析DNA相关蛋白质定位的手动步骤,成本和时间.
科学领域:
- 分子生物学
- 基因组学
- 表观遗传学
背景情况:
- 染色体免疫沉后的测序 (ChIP-seq) 对于全基因组的DNA相关蛋白质映射至关重要.
- 现有的ChIP-seq协议是劳动密集型的,涉及多个手动步骤,并对高吞吐量分析和自动化提出挑战,特别是对于非基因组蛋白.
- 之前的自动化工作只涉及ChIP-seq步骤的子集,限制了可扩展性和一致性.
研究的目的:
- 开发和验证一个端到端,完全自动化的单ChIP-seq (spa-ChIP-seq) 协议.
- 为 ChIP-seq 创建可扩展和成本高效的工作流程,减少手工劳动和提高可重复性.
- 系统地优化ChIP-seq参数并评估试剂比对信号检测的影响.
主要方法:
- 为先前建立的单ChIP-seq协议开发液体处理操作.
- 对ChIP-seq实现端到端自动化,可从8个到96个反应进行扩展.
- 与手动ChIPseq对比,对交叉连接,缓冲器和抗体与细胞比率等参数进行系统评估.
主要成果:
- spa-ChIP-seq协议是完全自动化的,可扩展的,并将图书馆准备时间缩短到大约3天,每个样本的成本约为70美元.
- spa-ChIP-seq显示了与手动ChIP-seq几乎无法区分的信号与噪声比率.
- 该研究确定了双交联色素的最佳条件,并显示抗体对细胞数量的比率对检测弱基因组定位信号产生了重大影响.
结论:
- 开发的 spa-ChIP-seq 协议为 ChIP-seq 实验提供了强大的,经济高效的,可扩展的解决方案.
- 这种自动化可促进ChIP-seq条件的系统优化,并增强微妙的基因组定位信号的检测.
- spa-ChIP-seq有可能通过提高吞吐量,改进量化和在人口基因组学和诊断等领域的更广泛应用来推进研究.
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