Mouth ulcer is associated with inflammation and high risk of bacterial infection, which aggravates the patient's condition.Currently, there is no effective treatment for mouth ulcer. Herein, we report that vitamin...Mouth ulcer is associated with inflammation and high risk of bacterial infection, which aggravates the patient's condition.Currently, there is no effective treatment for mouth ulcer. Herein, we report that vitamin-modified iron oxide nanoparticles improve the healing of mouth ulcer through anti-inflammation and antibacterial activities. We discovered that vitamin B2(VB2)modified iron oxide nanoparticles performed enhanced peroxidase-like, catalase-like, and superoxide dismutase(SOD)-like activities, acting as typical iron oxide nanozymes(IONzymes) with triad activities. In particular, VB2 modification significantly improved the SOD-like activity, thus providing a reactive oxygen species(ROS)-scavenging ability. Cellular antioxidant experiments showed that vitamin B2 modified IONzymes(VB2-IONzymes) protect human oral keratinocytes(HOK) and BALB/3 T3 cells from hydrogen peroxide(H2O2), and these cells have high biocompatibility to eukaryotic cells. In addition, VB2-IONzymes exerted an antibacterial activity against Streptococcus mutans, Staphylococcus aureus, and Escherichia coli. Importantly, VB2-IONzymes accelerated the recovery of mouth ulcer and reduced the local secretion of inflammatory factors in mouse ulcer model via ROS scavenging and antibacterial activity. Taken together, our work demonstrates that vitamin B2 modification endows iron oxide nanoparticles with enhanced enzyme-like activities and VB2-IONzymes may be a promising reagent in the treatment of mouth ulcer because of their intrinsic anti-inflammation and antibacterial capabilities.展开更多
基金supported by the National Key Research and Development Program of China(2018YFC1003500)the National Natural Science Foundation of China(81671810 and 31701236)the Jiangsu Provincial Basic Research Program for the Natural Science Foundation(BK20161333)
文摘Mouth ulcer is associated with inflammation and high risk of bacterial infection, which aggravates the patient's condition.Currently, there is no effective treatment for mouth ulcer. Herein, we report that vitamin-modified iron oxide nanoparticles improve the healing of mouth ulcer through anti-inflammation and antibacterial activities. We discovered that vitamin B2(VB2)modified iron oxide nanoparticles performed enhanced peroxidase-like, catalase-like, and superoxide dismutase(SOD)-like activities, acting as typical iron oxide nanozymes(IONzymes) with triad activities. In particular, VB2 modification significantly improved the SOD-like activity, thus providing a reactive oxygen species(ROS)-scavenging ability. Cellular antioxidant experiments showed that vitamin B2 modified IONzymes(VB2-IONzymes) protect human oral keratinocytes(HOK) and BALB/3 T3 cells from hydrogen peroxide(H2O2), and these cells have high biocompatibility to eukaryotic cells. In addition, VB2-IONzymes exerted an antibacterial activity against Streptococcus mutans, Staphylococcus aureus, and Escherichia coli. Importantly, VB2-IONzymes accelerated the recovery of mouth ulcer and reduced the local secretion of inflammatory factors in mouse ulcer model via ROS scavenging and antibacterial activity. Taken together, our work demonstrates that vitamin B2 modification endows iron oxide nanoparticles with enhanced enzyme-like activities and VB2-IONzymes may be a promising reagent in the treatment of mouth ulcer because of their intrinsic anti-inflammation and antibacterial capabilities.
文摘目的探讨康复新液联合西尼替丁治疗复发性口腔溃疡的疗效。方法选取2017年12月-2018年12月医院收治的140例复发性口腔溃疡患儿为研究对象,依据随机数字表法将其分为对照组70例与观察组70例,对照组施以西咪替丁,0.2g/次,3次/d,连续治疗7 d。观察组在对照组基础上加用康复新液治疗,将浸透5 m L的康复新液用医用脱脂棉球贴敷于溃疡患处,3次/d,饭后清洁口腔后使用,用药后半小时禁食、禁止漱口,连续治疗7 d。观察两组患儿的临床治疗效果,治疗前后疼痛评分、口腔溃疡愈合时间。结果治疗后,观察组治愈40例,显效21例,有效8例,无效1例,总有效率98.57%(69/70),对照组治愈33例,显效18例,有效11例,无效8例,总有效率88.57%(62/70)(P<0.05);治疗前两组VAS评分比较,差异无统计学以(P>0.05),具有可比性,治疗后较治疗前两组均有改善(P<0.05),观察组低于对照组(P<0.05);溃疡愈合时间观察组短于对照组(P<0.05)。结论康复新液联合西尼替丁治疗复发性口腔溃疡具有显著的临床效果,可减轻疼痛,促进溃疡愈合,值得推广。
