首页> 外文期刊>Nanotechnology >Characterization of Gd loaded chitosan-TPP nanohydrogels by a multi-technique approach combining dynamic light scattering (DLS), asymetrical flow-field-flow-fractionation (AF4) and atomic force microscopy (AFM) and design of positive contrast agents for molecular resonance imaging (MRI)
【24h】

Characterization of Gd loaded chitosan-TPP nanohydrogels by a multi-technique approach combining dynamic light scattering (DLS), asymetrical flow-field-flow-fractionation (AF4) and atomic force microscopy (AFM) and design of positive contrast agents for molecular resonance imaging (MRI)

机译:用多种技术方法表征Gd加载的壳聚糖-TPP纳米水凝胶组合动态光散射(DLS),非对称流场 - 流量分级(AF4)和原子力显微镜(AFM)和分子共振成像的正造影剂设计 (MRI)

获取原文
获取原文并翻译 | 示例
           

摘要

Chitosan CS-tripolyphosphate TPP/hyaluronic acid HA nanohydrogels loaded with gadolinium chelates (GdDOTA subset of CS-TPP/HA NGs) synthesized by ionic gelation were designed for lymph node (LN) MRI. In order to be efficiently drained to LNs, nanogels (NGs) needed to exhibit a diameter phi < 100 nm. For that, formulation parameters were tuned, using (i) CS of two different molecular weights (51 and 37 kDa) and (ii) variable CS/TPP ratio (2 < CS/TPP < 8). Characterization of NG size distribution by dynamic light scattering (DLS) and asymetrical flow-field-flow-fractionation (AF4) showed discrepancies since DLS diameters were consistently above 200 nm while AF4 showed individual nano-objects with phi < 100 nm. Such a difference could be correlated to the presence of aggregates inherent to ionic gelation. This point microscopy (AFM) in liquid mode which highlighted the main presence of individual nano-objects in nanosuspensions. Thus, combination of DLS, AF4 and AFM provided a more precise characterization of GdDOTA subset of CS-TPP/HA nanohydrogels which, in turn, allowed to select formulations leading to NGs of suitable mean sizes showing good MRI efficiency and negligible toxicity.
机译:为淋巴结(LN)MRI设计了由离子凝胶合成的钆螯合物(CS-TPP / HA NGS的GDDOTA子集)负载的壳聚糖Cs-三聚磷酸磷酸酸HA纳米铁凝胶。为了有效地排出到LNS,纳米凝胶(NGS)所需的直径pHi <100nm。为此,使用两种不同分子量(51和37kDa)和(ii)可变Cs / TPP比(2

著录项

  • 来源
    《Nanotechnology》 |2017年第5期|共15页
  • 作者单位

    URCA Inst Chim Mol Reims CNRS UMR 7312 F-51685 Reims 2 France;

    Univ Bucharest Dept Biochem &

    Mol Biol Fac Biol Bucharest Romania;

    URCA Inst Chim Mol Reims CNRS UMR 7312 F-51685 Reims 2 France;

    URCA Inst Chim Mol Reims CNRS UMR 7312 F-51685 Reims 2 France;

    Univ Bucharest Dept Biochem &

    Mol Biol Fac Biol Bucharest Romania;

    Univ Bucharest Dept Biochem &

    Mol Biol Fac Biol Bucharest Romania;

    URCA Inst Chim Mol Reims CNRS UMR 7312 F-51685 Reims 2 France;

    Univ Mons Lab RMN &

    Imagerie Mol B-7000 Mons Belgium;

    Univ Mons Lab RMN &

    Imagerie Mol B-7000 Mons Belgium;

    Univ Mons Lab RMN &

    Imagerie Mol B-7000 Mons Belgium;

    URCA Lab Rech Nanosci EA 4682 Plate Forme Nano Mat F-51685 Reims 2 France;

    URCA Lab Rech Nanosci EA 4682 Plate Forme Nano Mat F-51685 Reims 2 France;

    Univ Nantes Ecole Mines Nantes Lab Subatech IN2P3 CNRS UMR 6457 4 Rue A Kastler BP 20722 F-44307 Nantes 3 France;

    URCA Inst Chim Mol Reims CNRS UMR 7312 F-51685 Reims 2 France;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    nanohydrogels; chitosan; DLS; AF4; AFM-PFQNM; MRI contrast agents;

    机译:纳米水凝胶;壳聚糖;DLS;AF4;AFM-PFQNM;MRI合同代理商;

相似文献

  • 外文文献
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