Anti-biofilm activity of a novel nanoemulsion containing Curcuma xanthorrhiza oil

生物膜 化学 姜黄 活力测定 抗菌剂 食品科学 蒸馏水 微生物学 色谱法 细菌 生物化学 生物 细胞 有机化学 植物 遗传学
作者
Minseo Cho,Eun‐Song Lee,Hoi‐In Jung,Baek‐Il Kim
出处
期刊:Journal of Dentistry [Elsevier BV]
卷期号:137: 104647-104647 被引量:2
标识
DOI:10.1016/j.jdent.2023.104647
摘要

We aimed to solubilize Curcuma xanthorrhiza oil (CXO) using nanoemulsification and evaluate its inhibitory effects against biofilm formation.The components of CXO were evaluated through high-performance liquid chromatography (HPLC) analysis. Healthy human saliva was inoculated onto hydroxyapatite discs to form microcosm biofilms for four days and treated six times with each antimicrobial agent: distilled water (DW), CXO emulsion (EM), CXO nanoemulsion (NE), and positive controls (Listerine and chlorhexidine). Biofilm fluorescence imaging was performed using quantitative light-induced fluorescence, and cell viability and dry-weight measurements were obtained. We compared the bacterial cell and extracellular polysaccharide (EPS) biovolume and thickness using confocal laser scanning microscopy (CLSM).HPLC analysis revealed that CXO was composed of approximately 47% xanthorrhizol. Compared with DW, NE exhibited significantly lower red fluorescence intensity and area (42% and 37%, p < 0.001 and p < 0.001, respectively), and reduced total and aciduric bacterial cell viability (7.3% and 3.9%, p < 0.001, p = 0.01, respectively). Furthermore, the bacterial cell and EPS biovolume and thickness in NE decreased by 40-80% compared to DW, similar to chlorhexidine. Conversely, EM showed a significant difference only in cell viability against total bacteria when compared with DW (p = 0.003), with EPS biovolume and thickness exhibiting higher values than DW.Nanoemulsification successfully solubilized CXO and demonstrated superior anti-biofilm effects compared to the emulsion form.These findings suggest the potential use of NE as a novel antimicrobial agent for preventing oral diseases.
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