对于高通量酶性DNA甲基化测序的成本效益高的解决方案
bioRxiv : the preprint server for biology
|September 24, 2024
概括
一个新的向甲基化测序 (TMS) 协议提供了一种具有成本效益的方法来研究跨种群的DNA甲基化. 这种优化的方法提供了与昂贵的技术相比较的准确结果,使大规模的基因组研究成为可能.
科学领域:
- 基因组学就是基因组学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 进化生物学 进化生物学
背景情况:
- 对进化生物学,老年科学和医学基因组学来说,DNA甲基化分析非常重要.
- 全基因组甲基化分析对于人口研究来说往往太昂贵了.
- 使用双硫酸盐转换的现有减少表示方法可能会导致DNA损伤和偏差.
研究的目的:
- 优化和基准定向甲基化测序 (TMS) 协议以进行经济高效的,人口规模的DNA甲基化研究.
- 评估TMS性能与已建立的方法比如甲基化EPIC BeadChip和全基因组双硫酸盐测序.
- 评估TMS在非人类灵长类动物和各种人类种群中的适用性.
主要方法:
- 优化了针对性甲基化测序 (TMS) 协议,以实现小型化和降低成本 (目标为400万个CpG站点,价格为80美元).
- 通过多重复合增加吞吐量,减少DNA输入和酶分裂.
- 将TMS与Infinium MethylationEPIC BeadChip (n=55) 和全基因组双硫酸盐测序 (n=6) 进行比较.
- 在三种非人类灵长类动物物种和两个人类生存种群中验证了TMS.
主要成果:
- 优化的TMS与甲基化EPIC BeadChip (R2 = 0.97) 和全基因组双硫酸盐测序 (R2 = 0.99) 有着强烈的一致性.
- 在非人类灵长类动物中实现了高CpG位点捕获 (平均=77.1%),甲基化估计与减少表示双硫酸盐测序 (R2 = 0.98) 相一致.
- 在人类群体中确定了与年龄相关的DNA甲基化模式,与高收入群体一致.
结论:
- 优化的TMS协议是一种经过验证,具有成本效益和准确的方法,用于人口规模的DNA甲基化分析.
- TMS适用于多种应用,包括人类和非人类灵长类动物.
- 该协议促进了对表观基因组变异及其与不同人群的衰老和生活方式相关性的大规模研究.
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