Biomaterials:聚多巴胺涂层固定纳米Cu-MOFs可防止支架植入后的血栓形成

2019-03-21 不详 网络

在植入早期,血栓形成、急性炎症和不可控制的平滑肌细胞(SMC)增殖使支架内再狭窄恶化。调整支架表面可以抑制血栓形成,内膜增生,并加速再内皮化。原位一氧化氮(NO)的产生是一种改善抗凝血和抗增生能力的有前途的方法。铜基金属有机骨架作为NO生成催化剂显示出巨大的潜力,铜离子(Cu2 +)被证明可促进内皮细胞(ECs)的生长。在此,通过使用聚多巴胺作为接头和涂层基质,将纳米级铜基金属有机骨架(纳米Cu-

在植入早期,血栓形成、急性炎症和不可控制的平滑肌细胞(SMC)增殖使支架内再狭窄恶化。调整支架表面可以抑制血栓形成,内膜增生,并加速再内皮化。原位一氧化氮(NO)的产生是一种改善抗凝血和抗增生能力的有前途的方法。铜基金属有机骨架作为NO生成催化剂显示出巨大的潜力,铜离子(Cu2 +)被证明可促进内皮细胞(ECs)的生长。

在此,通过使用聚多巴胺作为接头和涂层基质,将纳米级铜基金属有机骨架(纳米Cu-MOF)固定在钛表面上,用于同时进行一氧化氮(NO)催化产生和Cu 2+递送。纳米Cu-MOFs固定的涂层显示出理想的NO释放和适应性Cu 2+递送。这种包衣通过NO-cGMP信号传导通路抑制血小板聚集和活化,并且在离体体外循环模型中显着减少血栓形成。NO释放和Cu2 +递送显示出协同作用以促进EC增殖。此外,通过纳米Cu-MOFs固定化涂层抑制SMC和巨噬细胞增殖,从而减少体内新内膜增生。

总的来说,这种生物相容性涂层便于血管支架的表面改性,并有效地防止晚期支架血栓形成和与支架植入相关的支架内再狭窄。

原始出处:

Fan Y, Zhang Y, et al., Immobilization of nano Cu-MOFs with polydopamine coating for adaptable gasotransmitter generation and copper ion delivery on cardiovascular stents. Biomaterials. 2019 Mar 9;204:36-45. doi: 10.1016/j.biomaterials.2019.03.007. 

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    2019-12-17 爆笑小医
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    2019-10-27 sunylz
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    2019-07-12 liao1627
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    2019-03-23 jiyangfei