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Wrecking neutrophil extracellular traps and antagonizing cancer-associated neurotransmitters by interpenetrating network hydrogels prevent postsurgical cancer relapse and metastases
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作者 Hang zhou Chunyan Zhu +8 位作者 Qing Zhao Jinliang Ni Haipeng Zhang Guangcan Yang Jianchao Ge Chao Fang Hong Wei xianli zhou Kun Zhang 《Bioactive Materials》 SCIE CSCD 2024年第9期14-24,共11页
Tumor-promoting niche after incomplete surgery resection(SR)can lead to more aggressive local progression and distant metastasis with augmented angiogenesis-immunosuppressive tumor microenvironment(TME).Herein,elevate... Tumor-promoting niche after incomplete surgery resection(SR)can lead to more aggressive local progression and distant metastasis with augmented angiogenesis-immunosuppressive tumor microenvironment(TME).Herein,elevated neutrophil extracellular traps(NETs)and cancer-associated neurotransmitters(CANTs,e.g.,catecholamines)are firstly identified as two of the dominant inducements.Further,an injectable fibrin-alginate hydrogel with high tissue adhesion has been constructed to specifically co-deliver NETs inhibitor(DNase I)-encapsulated PLGA nanoparticles and an unselectiveβ-adrenergic receptor blocker(propranolol).The two components(i.e.,fibrin and alginate)can respond to two triggers(thrombin and Ca2+,respectively)in postoperative bleeding to gelate,shaping into an interpenetrating network(IPN)featuring high strength.The continuous release of DNase I and PR can wreck NETs and antagonize catecholamines to decrease microvessel density,blockade myeloid-derived suppressor cells,secrete various proinflammatory cytokines,potentiate natural killer cell function and hamper cytotoxic T cell exhaustion.The reprogrammed TME significantly suppress locally residual and distant tumors,induce strong immune memory effects and thus inhibit lung metastasis.Thus,targetedly degrading NETs and blocking CANTs enabled by this in-situ IPN-based hydrogel drug depot provides a simple and efficient approach against SR-induced cancer recurrence and metastasis. 展开更多
关键词 Neutrophil extracellular traps Cancer-associated neurotransmitters Interpenetrating network hydrogels Postsurgical cancer relapse and metastases Immunosuppressive tumor microenvironment
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主客体胶束水凝胶的制备及对神经生长因子的包载 被引量:2
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作者 冯俊峰 张晟 +3 位作者 柯朵 李帮经 周先礼 黄帅 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2020年第3期140-148,共9页
通过可逆加成-断裂链转移聚合(RAFT)反应制备了一种亲水性两嵌段聚合物——聚乙二醇/聚N-异丙基丙烯酰胺(PEG-PNIPAM),利用α-环糊精(α-CD)与其中PEG链段的选择性包合形成了一种独特的主客体胶束,这种胶束由于具备中空结构,可对亲水性... 通过可逆加成-断裂链转移聚合(RAFT)反应制备了一种亲水性两嵌段聚合物——聚乙二醇/聚N-异丙基丙烯酰胺(PEG-PNIPAM),利用α-环糊精(α-CD)与其中PEG链段的选择性包合形成了一种独特的主客体胶束,这种胶束由于具备中空结构,可对亲水性药物起到很好的负载作用。其对神经生长因子的包载率为经典普朗尼克F127胶束的2倍。进一步利用主客体胶束为大分子交联剂制备丙烯酰胺水凝胶,可赋予水凝胶优异的力学性能,拉伸伸长率为化学交联对照组5倍,并且强度高于对照组2倍以上。循环拉伸测试表明,该水凝胶具有良好的应力耗散机制。 展开更多
关键词 主客体 胶束 神经生长因子 水凝胶
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