Periodontitis as a chronic infectious diseases, was characterized by periodontal tissue destruction, which was caused by microenvironmental immune hyperthyroidism. No related report was found which combining immunosuppressants and periodontal tissue engineering. We already successfully constructed nanoscaffolds by electrospinning technology with variety kind of nanoparticles, which effectively promote bone tissue regeneration. We aim to build a dimensional constructed nanoscaffold, with nanoparticles wrapping dispersed immunosuppressants as shell while the cell growth factor as core. By means of modifying the nanofiber structure, the releasing order and concentration of the immunosuppressants and growth factors was sequentially and targeted controlled, to achieve the anti-inflammatory and pro-regenerative effectively combined treatment of periodontal disease. Meanwhile, we will further study the expression of the inflammatory cytokines , from the perspective of JNK/ERK/p38 MAPK pathway, and explore more efficacious treatment.
牙周炎是一类以牙周支持组织破坏为特征的慢性感染性疾病,是免疫系统功能异常引发骨质破坏的疾患之一。将免疫抑制剂和牙周组织工程技术联合应用治疗牙周炎的研究目前尚未见报道。本项目组前期已成功构建多种纳米粒,并利用静电纺丝技术构建复合纳米支架,采用牙周组织工程技术有效地促进了骨组织再生。在此基础上,本项目拟应用同轴静电纺丝技术构建具有芯壳结构的纳米纤维,以纳米粒包裹免疫抑制剂使其分散在壳层结构,同时细胞生长因子分散在芯层结构。通过修饰免疫抑制剂和生长因子所在纤维的结构等手段来调节释放顺序和浓度,使其先释放免疫抑制剂后释放生长因子从而达到靶向控释的作用,将消炎和促再生有效地结合起来治疗牙周炎,同时从JNK/ERK/p38 MAPK 通路分析对炎症相关因子的表达情况,揭示其分子机制,并进一步探寻有针对性的治疗方法。
牙周炎是口腔常见疾病之一,其主要致病菌是革兰氏阴性厌氧杆菌,它的毒力因子---细菌外膜成分脂多糖(LPS)即内毒素,可穿过上皮进入深部组织,引发刺激性的骨丧失,在牙周炎发生、发展过程中发挥重要作用,研究表明牙周组织损害主要是由宿主对感染的持续免疫炎症反应引起的,牙周炎是免疫系统功能异常引发骨质破坏的疾患之一。探寻针对性的治疗方法,为患者解除痛苦,显得非常紧迫。.本项目在前期研究的基础上,利用纳米粒、同轴静电纺丝技术的优势,成功构建了一种局部分时、分型控释多重免疫抑制剂和生长因子的纳米粒同轴纤维牙周组织再生膜。应用同轴静电纺丝技术构建具有芯壳结构的纳米纤维支架,以纳米粒包裹疏水性小分子药物(免疫抑制剂)的形式使其分散在壳层结构,同时将细胞生长因子分散在芯层结构;通过修饰免疫抑制剂和生长因子所在纤维结构等手段来调节释放顺序和浓度,使前期先释放免疫抑制剂后释放生长因子,到达消炎和促再生有效地联合起来治疗牙周炎,并分析了其作用的分子机制。最后比较负载不同免疫抑制剂和生长因子的纳米粒同轴纤维牙周组织再生膜的局部分时分型控释、炎症控制和牙槽骨缺损修复能力,探究对牙周炎有针对性疗效的治疗方法。.研究结果对于解除牙周炎患者的痛苦,提高牙周炎治疗疗效等方面有着重要的理论意义和巨大的临床应用价值。已在国内外学术刊物上正式发表论文11篇,其中SCI收录论文6篇。在国际、国内全国学术会议上发表研究论文9篇。申请国家专利3项(其中申请发明专利2项),已授权发明专利1项。培养研究生5人。
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数据更新时间:2023-05-31
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