{"title":"Effect of 6-Shogaol Derived from Ginger (<i>Zingiber officinale</i>) on Dual-Species Biofilm Formation by <i>Streptococcus mutans</i> and <i>Candida albicans</i>.","authors":"Eun-Ha Jung, Geelsu Hwang, Ki-Rim Kim","doi":"10.3390/nu17182999","DOIUrl":null,"url":null,"abstract":"<p><strong>Background/objectives: </strong>Dental plaque, a biofilm composed of accumulated oral microorganisms, is a key contributor to various oral diseases. 6-shogaol, a bioactive compound of ginger, is known to have pharmacological activities, including anticancer, anti-inflammatory, and antimicrobial activities. Therefore, we aimed to determine the effects of 6-shogaol on dual-species biofilms of <i>Streptococcus mutans</i> (<i>S. mutans</i>) and <i>Candida albicans</i> (<i>C. albicans</i>).</p><p><strong>Methods: </strong>Dual-species oral biofilms were formed on hydroxyapatite (HA) disks for 42 h and exposed to 6-shogaol. The pH was measured in the experimental medium, and the biomass, colony-forming unit (CFU) of microbial cells, and insoluble extracellular polysaccharides (EPS) were quantified in the biofilm formed on the HA disk. Confocal laser scanning microscopy (CLSM) was used to assess biofilm morphology, and quantitative polymerase chain reaction was performed to analyze <i>gtf</i> gene expression.</p><p><strong>Results: </strong>6-shogaol dose-dependently reduced insoluble EPS, CFU counts, and dry weight of biofilms. The pH was maintained above 5.5 in the 6-shogaol-treated group. CLSM images showed that <i>S. mutans</i> proliferation, <i>C. albicans</i> hyphal development, and EPS production were markedly inhibited in biofilms treated with 6-shogaol. The expression of <i>gtfB</i> and <i>gtfC</i> was significantly downregulated by 6-shogaol.</p><p><strong>Conclusions: </strong>These findings suggest that 6-shogaol has the potential to be a promising natural product for the prevention and management of oral biofilm-related oral diseases.</p>","PeriodicalId":19486,"journal":{"name":"Nutrients","volume":"17 18","pages":""},"PeriodicalIF":5.0000,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12472764/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nutrients","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.3390/nu17182999","RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUTRITION & DIETETICS","Score":null,"Total":0}
引用次数: 0
Abstract
Background/objectives: Dental plaque, a biofilm composed of accumulated oral microorganisms, is a key contributor to various oral diseases. 6-shogaol, a bioactive compound of ginger, is known to have pharmacological activities, including anticancer, anti-inflammatory, and antimicrobial activities. Therefore, we aimed to determine the effects of 6-shogaol on dual-species biofilms of Streptococcus mutans (S. mutans) and Candida albicans (C. albicans).
Methods: Dual-species oral biofilms were formed on hydroxyapatite (HA) disks for 42 h and exposed to 6-shogaol. The pH was measured in the experimental medium, and the biomass, colony-forming unit (CFU) of microbial cells, and insoluble extracellular polysaccharides (EPS) were quantified in the biofilm formed on the HA disk. Confocal laser scanning microscopy (CLSM) was used to assess biofilm morphology, and quantitative polymerase chain reaction was performed to analyze gtf gene expression.
Results: 6-shogaol dose-dependently reduced insoluble EPS, CFU counts, and dry weight of biofilms. The pH was maintained above 5.5 in the 6-shogaol-treated group. CLSM images showed that S. mutans proliferation, C. albicans hyphal development, and EPS production were markedly inhibited in biofilms treated with 6-shogaol. The expression of gtfB and gtfC was significantly downregulated by 6-shogaol.
Conclusions: These findings suggest that 6-shogaol has the potential to be a promising natural product for the prevention and management of oral biofilm-related oral diseases.
期刊介绍:
Nutrients (ISSN 2072-6643) is an international, peer-reviewed open access advanced forum for studies related to Human Nutrition. It publishes reviews, regular research papers and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.