分析小鼠微生物群中的生物学和技术变异性以及对样本大小确定性的影响.
Zachary McAdams1,2, Kevin Gustafson2,3,4, Aaron Ericsson5,6,7,8
1Molecular Pathogenesis and Therapeutics Program, University of Missouri, Columbia, MO, USA.
Lab animal
|December 18, 2025
概括
了解小鼠的肠道微生物群 (GM) 变异对于研究至关重要. 这项研究量化了转基因生物和技术的变异性,为实验设计提供了指导,并强调了样本大小和测序成本之间的权衡.
科学领域:
- 微生物学 微生物学
- 动物研究 动物研究
- 生物信息学是一种生物信息学.
背景情况:
- 肠道微生物群 (GM) 显著影响宿主表型,使其成为生物医学研究的关键领域.
- 环境和生物因素对小鼠的转基因成分带来了变化,这可能会影响研究结果.
- 标准化便样本采集对于实验室小鼠的可靠转基因研究至关重要.
研究的目的:
- 在小鼠肠道微生物群研究中量化生物和技术变化的效果大小.
- 为设计涉及实验室小鼠的微生物组研究提供实际指导.
- 评估重复便采样对统计能力和实验成本的影响.
主要方法:
- 采用分层便采样策略,分析多个小鼠的多个样本.
- 在技术和生物层面上对α和β多样性指标的量化变化.
- 在两组实验设计中模拟了对每只老鼠多个便样本测序对效果大小的影响.
主要成果:
- 生物和技术变异在高跨组变异性设置中的实验变量相比,贡献了显著的,但较小的 (3-30倍低) 变化.
- 测序每只老鼠的5个便样本增加了效果大小,减少了5%的动物数量,但显著增加了测序成本.
- 生物学和技术因素可以显著影响具有较低平均差异的实验范式.
结论:
- 虽然重复的便采样可以提高小鼠微生物组研究的统计能力,但随之而来的测序成本的增加可能使其变得不切实际.
- 了解和量化变异源对于肠道微生物群研究中强大的实验设计至关重要.
- 研究人员必须在确定样本采集策略时,平衡统计能力的需求与测序成本的实际约束.
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