Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice.

Recurrent Escherichia coli Urinary Tract Infection Triggered by Gardnerella vaginalis Bladder Exposure in Mice.
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DOI:
10.3791/61967
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发表时间:
2020-12-04
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
通讯作者:
Gilbert NM
Gilbert NM
中科院分区:
其他
文献类型:
--
作者:
O'Brien VP;Joens MS;Lewis AL;Gilbert NM

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由尿路致病性大肠杆菌 (UPEC) 引起的复发性尿路感染 (rUTI) 很常见,而且费用高昂。之前描述雄性和雌性小鼠尿路感染模型的文章已经说明了尿液和组织中细菌接种和计数的程序。在 C57BL/6 小鼠的初始膀胱感染期间,UPEC 在膀胱上皮细胞内建立潜在的储存库,并在 UPEC 菌尿清除后持续存在。该模型建立在这些研究的基础上,旨在检查由潜伏膀胱储库内出现 UPEC 引起的 rUTI。在该模型中,泌尿生殖细菌阴道加德纳菌被用作 rUTI 的触发因素,因为它经常存在于女性的泌尿生殖道中,特别是在与 UTI 相关的阴道菌群失调的情况下。此外,还描述了一种原位膀胱固定方法,然后对膀胱组织进行扫描电子显微镜(SEM)分析,该方法可能应用于涉及膀胱的其他研究。
Recurrent urinary tract infections (rUTI) caused by uropathogenic Escherichia coli (UPEC) are common and costly. Previous articles describing models of UTI in male and female mice have illustrated the procedures for bacterial inoculation and enumeration in urine and tissues. During an initial bladder infection in C57BL/6 mice, UPEC establish latent reservoirs inside bladder epithelial cells that persist following clearance of UPEC bacteriuria. This model builds on these studies to examine rUTI caused by the emergence of UPEC from within latent bladder reservoirs. The urogenital bacterium Gardnerella vaginalis is used as the trigger of rUTI in this model because it is frequently present in the urogenital tracts of women, especially in the context of vaginal dysbiosis that has been associated with UTI. In addition, a method for in situ bladder fixation followed by scanning electron microscopy (SEM) analysis of bladder tissue is also described, with potential application to other studies involving the bladder.
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