定义阴道群落动态:日常微生物群过渡、月经的作用、噬菌体和细菌基因。

IF 13.8 1区 生物学 Q1 MICROBIOLOGY
Luisa W Hugerth, Maria Christine Krog, Kilian Vomstein, Juan Du, Zahra Bashir, Vilde Kaldhusdal, Emma Fransson, Lars Engstrand, Henriette Svarre Nielsen, Ina Schuppe-Koistinen
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引用次数: 0

摘要

背景:月经周期中阴道微生物群的组成是动态的,一些女性保持平衡或菌群失调,而另一些女性则在这两种状态之间转换。究竟是什么决定了这些动态变化,这些差异是微生物内在的还是主要由宿主驱动,目前尚不清楚。为了解决这个问题,我们对 49 名健康的年轻女性在月经周期中每天采集的阴道拭子进行了元基因组测序。我们对阴道微生物群的动态进行了分类,并评估了宿主行为的影响以及微生物群在物种、菌株、基因和噬菌体水平上的差异:根据月经周期中群落状态类型(CSTs)的每日变化,阴道微生物组被分为四种阴道群落动态(VCDs),并在一个名为VALODY的分类工具中进行了报告:恒定优生群、恒定失调群、月经相关群和不稳定失调群。对四种 VCD 的细菌、噬菌体和细菌基因含量进行了比较。即使被分配到相同的 CST,不同 VCD 的妇女在相对噬菌体丰度和细菌组成方面也存在显著差异。VCD 不稳定的女性噬菌体数量较高,而且更可能以 L. iners 为主。她们的加德纳菌属菌株也更有可能携带细菌素编码基因:结论:阴道菌群失调是一种新的时间序列分类方法,突出了不同程度阴道菌群失调的复杂性。通过了解噬菌体基因丰度和基因组菌株的差异,可以更深入地了解永久性菌群失调的启动和维持过程。应用 VCDs 进一步描述不同类型的微生物组动态特征,可提高疾病调查的质量,并可在个体和群体水平上进行比较。根据我们的数据,要将菌群失调样本准确归类到 VCD 中,临床医生需要两到三个周期中期样本和两个月经期样本。未来,重要的是要解决一过性 VCD 是否与持续性菌群失调具有相似的风险特征和相似的临床结果。这一框架可帮助跨学科转化团队破译阴道微生物组在女性健康和生殖中的作用。视频摘要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Defining Vaginal Community Dynamics: daily microbiome transitions, the role of menstruation, bacteriophages, and bacterial genes.

Background: The composition of the vaginal microbiota during the menstrual cycle is dynamic, with some women remaining eu- or dysbiotic and others transitioning between these states. What defines these dynamics, and whether these differences are microbiome-intrinsic or mostly driven by the host is unknown. To address this, we characterized 49 healthy, young women by metagenomic sequencing of daily vaginal swabs during a menstrual cycle. We classified the dynamics of the vaginal microbiome and assessed the impact of host behavior as well as microbiome differences at the species, strain, gene, and phage levels.

Results: Based on the daily shifts in community state types (CSTs) during a menstrual cycle, the vaginal microbiome was classified into four Vaginal Community Dynamics (VCDs) and reported in a classification tool, named VALODY: constant eubiotic, constant dysbiotic, menses-related, and unstable dysbiotic. The abundance of bacteria, phages, and bacterial gene content was compared between the four VCDs. Women with different VCDs showed significant differences in relative phage abundance and bacterial composition even when assigned to the same CST. Women with unstable VCDs had higher phage counts and were more likely dominated by L. iners. Their Gardnerella spp. strains were also more likely to harbor bacteriocin-coding genes.

Conclusions: The VCDs present a novel time series classification that highlights the complexity of varying degrees of vaginal dysbiosis. Knowing the differences in phage gene abundances and the genomic strains present allows a deeper understanding of the initiation and maintenance of permanent dysbiosis. Applying the VCDs to further characterize the different types of microbiome dynamics qualifies the investigation of disease and enables comparisons at individual and population levels. Based on our data, to be able to classify a dysbiotic sample into the accurate VCD, clinicians would need two to three mid-cycle samples and two samples during menses. In the future, it will be important to address whether transient VCDs pose a similar risk profile to persistent dysbiosis with similar clinical outcomes. This framework may aid interdisciplinary translational teams in deciphering the role of the vaginal microbiome in women's health and reproduction. Video Abstract.

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来源期刊
Microbiome
Microbiome MICROBIOLOGY-
CiteScore
21.90
自引率
2.60%
发文量
198
审稿时长
4 weeks
期刊介绍: Microbiome is a journal that focuses on studies of microbiomes in humans, animals, plants, and the environment. It covers both natural and manipulated microbiomes, such as those in agriculture. The journal is interested in research that uses meta-omics approaches or novel bioinformatics tools and emphasizes the community/host interaction and structure-function relationship within the microbiome. Studies that go beyond descriptive omics surveys and include experimental or theoretical approaches will be considered for publication. The journal also encourages research that establishes cause and effect relationships and supports proposed microbiome functions. However, studies of individual microbial isolates/species without exploring their impact on the host or the complex microbiome structures and functions will not be considered for publication. Microbiome is indexed in BIOSIS, Current Contents, DOAJ, Embase, MEDLINE, PubMed, PubMed Central, and Science Citations Index Expanded.
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