Structural Transformative Antioxidants for Dual‐Responsive Anti‐Inflammatory Delivery and Photoacoustic Inflammation Imaging
作者:Caiyan Zhao、Jingxiao Chen、Jiamin Ye、Zhi Li、Lichao Su、Junqing Wang、Ye Zhang、Jinghua Chen、Huanghao Yang、Jinjun Shi、Jibin Song
DOI:10.1002/anie.202100873
日期:2021.6.21
for more effective treatment of inflammation. Upon exposure to ROS, pPADN convert into the active form of L-DOPA, and a cascade of oxidative reactions transform it into antioxidative melanin-like materials. Concomitantly, the structural transformation of pPADN triggers the specific release of Dex, along with the acidic pH of inflammatory tissue. In a rat model of osteoarthritis, Dex-loaded pPADN markedly
我们已经合成了一种聚乙二醇化、苯基硼酸修饰的 L-DOPA 前抗氧化剂 (pPAD),它可以自组装成纳米颗粒 (pPADN),用于通过 1,3-二醇/苯基硼酸化学加载模型糖皮质激素地塞米松 (Dex) 和疏水相互作用以更有效地治疗炎症。暴露于 ROS 后,pPADN 转化为 L-DOPA 的活性形式,一系列氧化反应将其转化为抗氧化的黑色素样物质。同时,pPADN 的结构转变触发了 Dex 的特异性释放,以及炎症组织的酸性 pH。在骨关节炎大鼠模型中,加载 Dex 的 pPADN 显着减轻滑膜炎症,抑制关节破坏和软骨基质降解,体内毒性可忽略不计。而且,