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Effect of different salivary glucose concentrations on dual-species biofilms of Candida albicans and Streptococcus mutans

机译：不同唾液葡萄糖浓度对念珠菌和链球菌的双种生物膜的影响

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摘要

Diabetes mellitus is one of the most prevalent diseases worldwide. The glucose levels found in the blood of diabetic patients can be reflected in the saliva, which can favor biofilm growth and predispose denture wearers to oral candidiasis. This study aimed to evaluate the effect of different salivary glucose concentrations on dual-species biofilms of Candida albicans and Streptococcus mutans. A 96-h biofilm was developed on acrylic resin specimens exposed to 'feast' (10% sucrose) and 'famine' periods. Biofilms were constantly exposed to salivary glucose concentrations equivalent to 0, 20, 60 and 100 mM. Higher salivary glucose concentrations resulted in increased counts of C. albicans and a higher quantity of insoluble extracellular polysaccharides. All biofilms presented high phospholipase activity. The biofilms were characterized by the predominance of yeast cells and microcolonies in all the groups analyzed with co-localization of both species. Higher salivary glucose concentrations formed more robust and potentially virulent biofilms.
机译：糖尿病是全球最普遍的疾病之一。糖尿病患者的血液中发现的葡萄糖水平可以反映在唾液中，这可以有利于生物膜生长和使义齿佩戴者倾向于口腔念珠菌病。本研究旨在评估不同唾液葡萄糖浓度对念珠菌和链球菌的双种生物膜的影响。在暴露于“盛宴”（10％蔗糖）和“饥荒”时期的丙烯酸树脂标本上开发了96-H生物膜。生物膜恒定地暴露于当量的唾液葡萄糖浓度，其等于0,20,60和100mm。更高的唾液葡萄糖浓度导致C. albicans的数量增加和较高量的不溶性细胞外多糖。所有生物膜均呈现高磷脂酶活性。通过用两种物种的共定位分析的所有基团中的酵母细胞和微菌体的优势表征生物膜。更高的唾液葡萄糖浓度形成更稳健和潜在的毒性生物膜。

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