Vaginal microbial dynamics and pathogen colonization in a humanized microbiota mouse model.

Vaginal microbial dynamics and pathogen colonization in a humanized microbiota mouse model.
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阴道微生物动力学和病原体定植在人源化微生物群小鼠模型。

DOI:
10.1038/s41522-023-00454-9
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发表时间:
2023-11-20
影响因子:
9.2
通讯作者:
Patras, Kathryn A.
Patras, Kathryn A.
中科院分区:
生物学1区
文献类型:
--
作者:
Mejia, Marlyd E.;Mercado-Evans, Vicki;Zulk, Jacob J.;Ottinger, Samantha;Ruiz, Korinna;Ballard, Mallory B.;Fowler, Stephanie W.;Britton, Robert A.;Patras, Kathryn A.

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阴道微生物组成与泌尿生殖系统感染的不同风险相关。尽管乳酸菌被认为具有抗感染的作用,但缺乏类似于人类阴道微生物群的体内模型仍然是发现其机制的一个突出障碍。通过对C57BL/6J雌性小鼠的16S rRNA扩增子测序,我们发现在3个不同的小鼠体内,阴道微生物组成在菌落内和菌落之间存在差异。注意到常规小鼠阴道微生物的可塑性,我们评估了人源化微生物群小鼠(HMbmice)的阴道微生物组。与传统小鼠的群落结构一样,HMbmice阴道微生物群聚集成不同的群落状态类型,但其独特之处在于,HMbmice的群落往往以乳杆菌或肠杆菌科为主。与常规小鼠相比,hmb小鼠对泌尿生殖道病原体B组链球菌(GBS)和bivia普氏菌(Prevotella bivia)引起的子宫上升的易感性较低。虽然大肠杆菌和乳酸菌都与子宫GBS的不存在相关,但阴道预接种外源性hmbmouse来源的大肠杆菌,而不是轻乳酸菌,减少了阴道GBS的负担。总之,HMbmice可以作为一个有用的模型来阐明内源性微生物在保护泌尿生殖系统病原体方面的作用。
Vaginal microbial composition is associated with differential risk of urogenital infection. Although Lactobacillus spp. are thought to confer protection against infection, the lack of in vivo models resembling the human vaginal microbiota remains a prominent barrier to mechanistic discovery. Using 16S rRNA amplicon sequencing of C57BL/6J female mice, we found that vaginal microbial composition varies within and between colonies across three vivaria. Noting vaginal microbial plasticity in conventional mice, we assessed the vaginal microbiome of humanized microbiota mice (HMbmice). Like the community structure in conventional mice, HMbmice vaginal microbiota clustered into community state types but, uniquely, HMbmice communities were frequently dominated by Lactobacillus or Enterobacteriaceae. Compared to conventional mice, HMbmice were less susceptible to uterine ascension by urogenital pathobionts group B Streptococcus (GBS) and Prevotella bivia. Although Escherichia and Lactobacillus both correlated with the absence of uterine GBS, vaginal pre-inoculation with exogenous HMbmouse-derived E. coli, but not Ligilactobacillus murinus, reduced vaginal GBS burden. Overall, HMbmice serve as a useful model to elucidate the role of endogenous microbes in conferring protection against urogenital pathogens.
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