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<p><i>Lactobacillus</i> displacement from the vaginal microbiome associates with adverse health outcomes and is linked to increased risk of preterm birth. Glycans mediate bacterial adhesion events involved in colonisation and infection. Using customised glycan microarrays, we establish glycan interaction profiles of vaginal bacteria implicated in reproductive health. Glycan binding signatures of the opportunistic pathogens <i>Escherichia coli</i>, <i>Fusobacterium nucleatum</i> and <i>Streptococcus agalactiae</i> to oligomannose N-glycans, galactose-terminating glycans and hyaluronic acid, respectively are highly distinct from <i>Lactobacillus</i> commensals. Binding to sulphated glycosaminoglycans by vaginal bacteria is pH dependent, as is binding to neutral and sialic acid-terminating glycans by <i>F. nucleatum</i>. Adhesion of <i>Lactobacillus crispatus</i>, <i>Lactobacillus iners</i>, <i>Gardnerella vaginalis</i>, <i>S. agalactiae</i> and <i>F. nucleatum</i> to vaginal epithelial cells is partially mediated by chondroitin sulphate. <i>S. agalactiae</i> binding to chondroitin sulphate C oligosaccharides is inhibited by <i>L. crispatus</i>. This study highlights glycans as mediators of vaginal bacterial binding events involved in reproductive health and disease.</p>

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Identification and characterisation of vaginal bacteria-glycan interactions implicated in reproductive tract health and pregnancy outcomes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月5日

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  • Virginia Tajadura-Ortega,
  • Wengang Chai,
  • Lauren A. Roberts,
  • Yibing Zhang,
  • Antonio Di Maio,
  • Alexiane C. Decout,
  • Benedita A. Pinheiro,
  • Angelina S. Palma,
  • Gian De Nicola,
  • Lucia Riaposova,
  • Belen Gimeno-Molina,
  • Yun S. Lee,
  • Hongzhi Cao,
  • Vladimir Piskarev,
  • Yukie Akune,
  • Tiago R. D. Costa,
  • Himani Amin,
  • Lynne Sykes,
  • Phillip R. Bennett,
  • Julian R. Marchesi,
  • Ten Feizi,
  • Yan Liu,
  • David A. MacIntyre

摘要

Lactobacillus displacement from the vaginal microbiome associates with adverse health outcomes and is linked to increased risk of preterm birth. Glycans mediate bacterial adhesion events involved in colonisation and infection. Using customised glycan microarrays, we establish glycan interaction profiles of vaginal bacteria implicated in reproductive health. Glycan binding signatures of the opportunistic pathogens Escherichia coli, Fusobacterium nucleatum and Streptococcus agalactiae to oligomannose N-glycans, galactose-terminating glycans and hyaluronic acid, respectively are highly distinct from Lactobacillus commensals. Binding to sulphated glycosaminoglycans by vaginal bacteria is pH dependent, as is binding to neutral and sialic acid-terminating glycans by F. nucleatum. Adhesion of Lactobacillus crispatus, Lactobacillus iners, Gardnerella vaginalis, S. agalactiae and F. nucleatum to vaginal epithelial cells is partially mediated by chondroitin sulphate. S. agalactiae binding to chondroitin sulphate C oligosaccharides is inhibited by L. crispatus. This study highlights glycans as mediators of vaginal bacterial binding events involved in reproductive health and disease.