Escherichia coli FimH adhesins act synergistically with PapGII adhesins for enhancing establishment and maintenance of kidney infection

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Background: FimH adhesin is proposed to enhance Escherichia coli kidney infection by acting with PapGII adhesin, but genetic epidemiology study and animal study have not been widely conducted to confirm this hypothesis. Methods: We compared the prevalence of adhesin gene and their coexistent pattern between upper and lower urinary tract infection (UTI) strains. fimH mutant (EC114FM), papGII mutant (EC114PM) and fimH/papGII double mutant (EC114DM) were constructed from a pylonephritogenic strain (EC114). We compared among these strains for the infection ability in bladders and kidneys of female BALB/c mice challenged transurethrally with these bacteria and assessed 1, 3, and 7 days after inoculation. Results: Strains carrying fimH-only genotype were significantly more prevalent in lower UTI (P < 0.001). Strains carrying the fimH/papGII, but not papGII-only, were significantly associated with upper UTI (P = 0.001). Incidence of kidney infection increased after inoculation with EC114 on days 1 and 3, at both low and high dose, as compared with EC114DM; and the effect was greater than the sum of individual effect of EC114PM and EC114FM. Geometric means of quantitative bacterial counts in the kidneys significantly decreased when challenged with EC114FM on days 3 and 7, EC114PM on day 3 and EC114DM on day 1 after inoculation at high dose, as compared with EC114 (all P < 0.05). Conclusions: We confirmed the advantage and synergistic action of FimH and PapGII for E. coli kidney infection and concluded that antagonists against FimH and PapGII adhesin may prevent kidney infection and enable its management.

原文English
頁(從 - 到)44-50
頁數7
期刊Journal of Microbiology, Immunology and Infection
55
發行號1
DOIs
出版狀態Published - 2022 2月

All Science Journal Classification (ASJC) codes

  • 免疫學和過敏
  • 免疫學與微生物學 (全部)
  • 微生物學(醫學)
  • 傳染性疾病

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