首页> 外文期刊>Advanced Functional Materials >pH and Reactive Oxygen Species-Sequential Responsive Nano-in-Micro Composite for Targeted Therapy of Inflammatory Bowel Disease
【24h】

pH and Reactive Oxygen Species-Sequential Responsive Nano-in-Micro Composite for Targeted Therapy of Inflammatory Bowel Disease

机译:pH和活性氧物种-顺序响应纳米微复合物在炎症性肠病的靶向治疗中的应用

获取原文
获取原文并翻译 | 示例
           

摘要

Oxidative stress and abnormally high levels of reactive oxygen species (ROS) play an essential role in the pathogenesis and progression of inflammatory bowel disease (IBD). Oxidation-responsive nanoparticles (NPs) are formulated from a phenylboronic esters-modified dextran (OxiDEX) that degrades selectively in response to hydrogen peroxide (H2O2). OxiDEX NPs are coated with chitosan and encapsulated in a pH-sensitive polymer to produce nano-in-micro composites. The microparticles are spherical with homogeneous particle size (53 +/- 3 mu m) and maintain integrity at acidic pH, preventing the premature release of the NPs in gastric conditions. The degradation of NPs is highly responsive to the level of H2O2, and the release of the drug is sustained in the presence of physiologically relevant H2O2 concentrations. The presence of chitosan on the particles surface significantly enhances NPs stability in intestinal pH and their adhesion on the intestinal mucosa. Compared to a traditional enteric formulation, this formulation shows tenfold decreased drug permeability across C2BBe1/HT29MTX cell monolayer, implying that lower amount of drug would be absorbed to the blood stream and, therefore, limiting the undesired systemic side effects. Based on these results, a successful nano-in-micro composite for targeted therapy of IBD is obtained by combination of the responsiveness to pH and ROS.
机译:氧化应激和异常高水平的活性氧(ROS)在炎症性肠病(IBD)的发病机理和进程中起着至关重要的作用。氧化响应纳米颗粒(NPs)由苯基硼酸酯改性的葡聚糖(OxiDEX)配制而成,该葡聚糖可响应过氧化氢(H2O2)选择性降解。 OxiDEX NP涂有壳聚糖,并封装在对pH敏感的聚合物中,以生产纳米微复合材料。微粒是球形的,具有均一的粒径(53 +/- 3微米),并在酸性pH值下保持完整性,从而防止了在胃部条件下NP的过早释放。 NPs的降解对H2O2的含量高度敏感,在生理上相关的H2O2浓度存在的情况下,药物的释放得以持续。壳聚糖在颗粒表面的存在显着增强了NP在肠道pH中的稳定性以及它们在肠道粘膜上的粘附力。与传统的肠溶制剂相比,该制剂在整个C2BBe1 / HT29MTX细胞单层中的药物渗透性降低了十倍,这意味着较少量的药物将被吸收到血流中,因此限制了不良的全身性副作用。基于这些结果,通过结合对pH和ROS的响应性,获得了成功的用于IBD靶向治疗的纳米微复合材料。

著录项

  • 来源
    《Advanced Functional Materials》 |2018年第50期|1806175.1-1806175.11|共11页
  • 作者单位

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland|Univ Bologna, Dept Pharm & BioTechnol, PharmTech Lab, Via S Donato 19-2, I-40127 Bologna, Italy;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Dept Chem, Helsinki 00014, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland|Univ Helsinki, Helsinki Inst Life Sci HiLIFE, FIN-00014 Helsinki, Finland;

    Univ Bologna, Dept Pharm & BioTechnol, PharmTech Lab, Via S Donato 19-2, I-40127 Bologna, Italy;

    Univ Bologna, Dept Pharm & BioTechnol, PharmTech Lab, Via S Donato 19-2, I-40127 Bologna, Italy;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland;

    Univ Helsinki, Fac Pharm, Div Pharmaceut Chem & Technol, Drug Res Program, FIN-00014 Helsinki, Finland|Univ Helsinki, Helsinki Inst Life Sci HiLIFE, FIN-00014 Helsinki, Finland;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    inflammatory bowel disease; microfluidics; nanoparticles; oxidation-responsive; ROS-responsive delivery;

    机译:炎症性肠病;微流控;纳米颗粒;氧化反应性;ROS反应性传递;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号