Chance Deborah L, Wang Wei, Waters James K, Mawhinney Thomas P
Department of Molecular Microbiology & Immunology, University of Missouri School of Medicine, Columbia, MO 65212, USA.
Department of Pediatrics, University of Missouri School of Medicine, Columbia, MO 65212, USA.
Microorganisms. 2024 Apr 16;12(4):801. doi: 10.3390/microorganisms12040801.
contributes to frequent, persistent, and, often, polymicrobial respiratory tract infections for individuals with cystic fibrosis (CF). Chronic CF infections lead to bronchiectasis and a shortened lifespan. expresses numerous adhesins, including lectins known to bind the epithelial cell and mucin glycoconjugates. Blocking carbohydrate-mediated host-pathogen and intra-biofilm interactions critical to the initiation and perpetuation of colonization offer promise as anti-infective treatment strategies. To inform anti-adhesion therapies, we profiled the monosaccharide binding of from CF and non-CF sources, and assessed whether specific bacterial phenotypic characteristics affected carbohydrate-binding patterns. Focusing at the cellular level, microscopic and spectrofluorometric tools permitted the solution-phase analysis of binding to a panel of fluorescent glycopolymers possessing distinct pendant monosaccharides. All demonstrated significant binding to glycopolymers specific for α-D-galactose, β-D--acetylgalactosamine, and β-D-galactose-3-sulfate. In each culture, a small subpopulation accounted for the binding. The carbohydrate anomeric configuration and sulfate ester presence markedly influenced binding. While this opportunistic pathogen from CF hosts presented with various colony morphologies and physiological activities, no phenotypic, physiological, or structural feature predicted enhanced or diminished monosaccharide binding. Important to anti-adhesive therapeutic strategies, these findings suggest that, regardless of phenotype or clinical source, maintain a small subpopulation that may readily associate with specific configurations of specific monosaccharides. This report provides insights into whole-cell carbohydrate-binding profiles and into the context within which successful anti-adhesive and/or anti-virulence anti-infective agents for CF must contend.
对于患有囊性纤维化(CF)的个体,它会导致频繁、持续且通常为多微生物的呼吸道感染。慢性CF感染会导致支气管扩张并缩短寿命。它表达多种黏附素,包括已知能结合上皮细胞和黏蛋白糖缀合物的凝集素。阻断碳水化合物介导的宿主 - 病原体和生物膜内相互作用对于定植的起始和持续至关重要,这为抗感染治疗策略带来了希望。为了为抗黏附疗法提供信息,我们分析了来自CF和非CF来源的[具体细菌名称未给出]的单糖结合情况,并评估了特定细菌表型特征是否影响碳水化合物结合模式。聚焦于细胞水平,显微镜和光谱荧光工具允许对[具体细菌名称未给出]与一组具有不同侧链单糖的荧光糖聚合物的结合进行溶液相分析。所有[具体细菌名称未给出]都显示出与对α - D - 半乳糖、β - D - N - 乙酰半乳糖胺和β - D - 半乳糖 - 3 - 硫酸盐特异的糖聚合物有显著结合。在每种培养物中,一小部分亚群负责这种结合。碳水化合物的异头构型和硫酸酯的存在显著影响结合。虽然这种来自CF宿主的机会致病菌呈现出各种菌落形态和生理活性,但没有表型、生理或结构特征能预测单糖结合的增强或减弱。对于抗黏附治疗策略很重要的是,这些发现表明,无论表型或临床来源如何,[具体细菌名称未给出]都维持着一小部分亚群,它们可能很容易与特定单糖的特定构型相关联。本报告深入了解了全细胞[具体细菌名称未给出]的碳水化合物结合谱以及CF成功的抗黏附剂和/或抗毒力抗感染剂必须应对的背景。