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南昌大学万文兵联合中科院陈世萱团队ACS Nano丨核壳结构多功能微针贴片:协同抗菌、抗氧化与促再生实现无疤痕伤口愈合

  • 2026-03-29 20:30:03
南昌大学万文兵联合中科院陈世萱团队ACS Nano丨核壳结构多功能微针贴片:协同抗菌、抗氧化与促再生实现无疤痕伤口愈合

文献溯源

原名: Multifunctional Microneedle Patch with Antibacterial, Antioxidant, and Pro-Regenerative Properties for Scarless Wound Healing

译名: 具有抗菌、抗氧化和促再生特性的多功能微针贴片用于无疤痕伤口愈合
期刊ACS Nano
影响因子:16.1
发表时间:  2026.3.25
链接:https://pubmed.ncbi.nlm.nih.gov/41883048/                              

01

研究内容

创伤尤其是大面积皮肤缺损常伴随细菌感染过量活性氧(ROS)产生炎症失控,导致愈合延迟疤痕形成。现有治疗手段难以同时解决这些问题。因此,开发兼具抗菌、抗氧化、抗炎和促再生功能的新型敷料成为研究热点

本研究设计了一核壳结构微针贴片。外壳采用螯合铜离子黑色素纳米颗粒(Melanin@Cu),用于抗菌光热治疗;内核装载丹酚酸B微球(Sal B),用于抑制疤痕形成。通过模具浇铸法制备微针阵列,并进行材料表征、药物释放模拟、体外细胞实验和体内感染伤口模型(兔背部及兔耳)验证其疗效

该微针贴片在体外表现出优异的ROS清除能力抗菌活性(对金黄色葡萄球菌抑制率达98.36%)、促进成纤维细胞迁移血管形成的作用。在兔感染伤口模型中,显著加速愈合减少炎症改善胶原重塑。兔耳疤痕模型中,有效降低疤痕升高指数(SEI)和I/III型胶原比,实现无疤痕愈合RNA-seq揭示调控炎症胶原沉积相关通路
该示意图系统展示了本研究中核壳结构微针贴片的构建流程与核心治疗机制:首先从墨鱼中提取天然黑色素,经EDTA纯化去除杂质后与CuCl₂混合,通过螯合作用制备出Melanin@Cu纳米颗粒;同时通过化学修饰合成HA-PBA,并利用双乳液法制备负载丹酚酸B(Sal B)的PLGA微球。在近红外光照射下,微针外壳中的Melanin@Cu响应性释放Cu⁺/Cu²⁺并产生ROS,协同光热效应高效杀灭金黄色葡萄球菌和大肠杆菌;随后内核中的Sal B缓慢释放,下调促炎因子(TNF、IL-1β)、上调抗炎因子(IL-10),并促进M1向M2巨噬细胞极化,同时诱导III型胶原沉积、减少I型胶原比例,最终实现无疤痕的皮肤再生。

02

研究亮点及创新点

1.三重协同抗菌机制: 该微针系统通过铜离子的直接杀菌作用、黑色素介导的光热效应(温度升至44.5°C)以及光热诱导的ROS产生,实现对金黄色葡萄球菌和大肠杆菌的高效杀灭(抑制率分别达98.36%和99.59%),远超单一机制的治疗效果。

2.调控巨噬细胞极化实现抗炎与促再生: 研究发现,该微针贴片能显著下调M1型巨噬细胞标志物iNOS,上调M2型标志物CD206,促使巨噬细胞从促炎表型向促再生表型转化。同时,抗炎因子IL-10表达升高,促炎因子TNF-α降低,从而营造有利于组织修复的微环境。
3.核壳结构实现程序性药物释放: 通过计算模拟和实验验证,外壳中的Melanin@Cu在ROS和pH响应下优先释放,快速抗菌;内核中的Sal B微球缓慢释放,持续抑制疤痕形成。这种时间上的“先杀菌、后抗疤”策略,实现了治疗功能的时序匹配,显著提升了整体愈合质量。

科研思维积累

1.多问题导向的整合设计思维:研究者并未孤立处理感染、氧化应激、疤痕等问题,而是将它们视为一个相互关联的系统,设计出一种微针平台同时应对多重挑战。这种从“单一功能”向“多功能集成”的转变,体现了系统性和工程化的科研思维

2.从机制到应用的逆向转化思维: 研究从临床问题(感染性伤口易留疤)出发,反向推导所需功能(抗菌、抗氧化、促再生),再筛选相应材料(Melanin@Cu、Sal B),最后构建并验证平台。这种“需求驱动”的逆向思维,有助于提高研究的临床转化效率

3.多模态验证与交叉验证思维:研究者不仅做了常规的体外细胞实验和动物模型验证,还引入了计算模拟(药物扩散)、RNA-seq转录组分析、组织病理多染色(H&E、Masson、Sirius Red)和免疫荧光等多维度手段。不同方法之间相互印证,显著增强了结论的可靠性和机制的深度。

END

往期回顾

华南理工大学邵丹教授团队ACS Nano:口服抗原工程酵母疫苗引发强大的肠道粘膜免疫!

  国家纳米科学中心朱墨桃教授团队APSB:阿克曼菌外膜囊泡共载系统靶向诱导肿瘤细胞铜死亡!
  唐本忠院士/李莹教授团队Nature子刊:AIEgen细菌混合仿生机器人实现肿瘤多模态诊疗!

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  1. CONNECT:[ UseTime:0.000365s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000780s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000298s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000248s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000527s ]
  6. SELECT * FROM `set` [ RunTime:0.000230s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000538s ]
  8. SELECT * FROM `article` WHERE `id` = 491876 LIMIT 1 [ RunTime:0.000418s ]
  9. UPDATE `article` SET `lasttime` = 1774800333 WHERE `id` = 491876 [ RunTime:0.003004s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000308s ]
  11. SELECT * FROM `article` WHERE `id` < 491876 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000378s ]
  12. SELECT * FROM `article` WHERE `id` > 491876 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000919s ]
  13. SELECT * FROM `article` WHERE `id` < 491876 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001195s ]
  14. SELECT * FROM `article` WHERE `id` < 491876 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002545s ]
  15. SELECT * FROM `article` WHERE `id` < 491876 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003528s ]
0.082932s