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Biomaterials:叶酸功能化生物活性离子释放纳米颗粒可有效发挥抗炎作用

2019-04-27 不详 网络

炎性环境延迟受损组织的愈合过程,导致功能障碍。尽管抗炎药物在临床上可用,但它们经常引起副作用。本研究中,我们报告了无药物合成纳米粒子,其靶向和内化促炎细胞并释放离子,最终显示出长期的抗炎功能。我们介绍了叶酸功能化的生物活性玻璃纳米粒子BGN(F),它可以结合促炎细胞内吞和释放离子。叶酸结合显著增强纳米颗粒内化至LPS诱导的促炎细胞。以适当剂量(80-160μg/ mL)直接处理BGN(F)可显着下

炎性环境延迟受损组织的愈合过程,导致功能障碍。尽管抗炎药物在临床上可用,但它们经常引起副作用。

本研究中,我们报告了无药物合成纳米粒子,其靶向和内化促炎细胞并释放离子,最终显示出长期的抗炎功能。我们介绍了叶酸功能化的生物活性玻璃纳米粒子BGN(F),它可以结合促炎细胞内吞和释放离子。叶酸结合显著增强纳米颗粒内化至LPS诱导的促炎细胞。以适当剂量(80-160μg/ mL)直接处理BGN(F)可显着下调基因和蛋白质水平的促炎分子,包括TNF-α,IL-6,iNOS和COX-2。通过BGN(F)处理显著抑制参与炎症事件的细胞内信号分子的磷酸化,例如p38MAPK,ERK(1/2),SAPK / JANK,IκBα和NF-κB。此外,BGN(F)有可能将巨噬细胞极化从M1转换为M2。观察到纳米颗粒的释放离子而非物理相互作用在很大程度上有助于BGN(F)的抗炎作用。当BGN(F)局部施用于小鼠中的Notexin诱导的肌损伤组织时,显着下调IL-6和TNF-α,将巨噬细胞表型从M1转换为M2,并加速组织愈合。

总之,目前的研究结果表明BGN(F)在体外和体内具有深远的抗炎作用,支持其作为新型无药物纳米治疗平台用于治疗发炎组织的用途。

原始出处:

Kim TH, Kang MS, et al., Anti-inflammatory actions of folate-functionalized bioactive ion-releasing nanoparticles imply drug-free nanotherapy of inflamed tissues. Biomaterials. 2019 Jul;207:23-38. doi: 10.1016/j.biomaterials.2019.03.034. Epub 2019 Mar 27.

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    2019-12-22 sunylz
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    2019-04-27 329523732

    不错

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