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实验测试挑战了健康的人类血液微生物组的证据
Leandro Di Gloria1, Simone Baldi2, Lavinia Curini3
1Department of Experimental and Clinical Biomedical Sciences, University of Florence, Italy.
The FEBS journal
|December 17, 2024
概括
下一代测序挑战了无菌的人类血液信仰. 这项研究表明,在健康的血液中偶尔会检测到残留DNA,而不是可活的细菌,这突显了精确的元基因组学研究的关键控制需求.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 人类健康 人类健康 人类健康
背景情况:
- 下一代测序 (NGS) 能够在不同的人体部位进行微生物社区分析.
- 以往对人体无菌部位的信念,就像人类血液一样,受到元基因组研究的挑战.
- 微生物生物质量较低的环境在元基因组学研究中容易产生误解.
研究的目的:
- 从健康的献血者血液样本中批判性地评估16S rRNA基因测序结果.
- 解决潜在的偏见,加强对人类血液微生物组的研究.
- 为了调查健康人体血液中微生物DNA的存在和起源.
主要方法:
- 利用了来自健康血液样本的总DNA上的16S向安普利康序列.
- 整合了新的负控,添加了可丢弃的序列来识别污染.
- 量化和分析微生物DNA的存在,区分真实的信号和背景噪音.
主要成果:
- 在样本中偶尔检测到只有三种生物.
- 检测到的生物主要归因于无处不在的实验室试剂污染.
- 没有发现常见健康的人类血液微生物群的有力证据.
结论:
- 结果表明,在健康的血液中很少发现残留的细菌DNA,而不是可活的细菌.
- 强调在元基因组研究中强大的负控制具有至关重要的重要性.
- 强调需要仔细解释,以避免误认为污染是生物信号.
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