当前位置:首页>南昌>南昌大学附一院 Materials Today Bio | 靶向Ce-MOF纳米酶 | ROS清除炎症重编程 | 慢性胰腺炎

南昌大学附一院 Materials Today Bio | 靶向Ce-MOF纳米酶 | ROS清除炎症重编程 | 慢性胰腺炎

  • 2026-05-13 21:26:12
南昌大学附一院 Materials Today Bio | 靶向Ce-MOF纳米酶 | ROS清除炎症重编程 | 慢性胰腺炎

一、研究背景

慢性胰腺炎(CP)是一种以持续炎症和进行性纤维化为特征的不可逆疾病,其核心机制在于ROS介导的氧化应激与炎症反应形成恶性循环,同时激活胰腺星状细胞促进胶原沉积与组织破坏,然而传统抗氧化治疗由于递送效率低、作用短暂及缺乏靶向性,难以有效阻断疾病进展,因此开发能够靶向病灶并协同清除ROS与抑制炎症信号的策略至关重要。

二、研究思路

作者构建透明质酸(HA)修饰的姜黄素负载Ce基MOF纳米酶(HC@CeMOF),利用HA-CD44介导炎症靶向,实现纳米酶在胰腺病灶富集,通过Ce³⁺/Ce⁴⁺循环高效清除ROS,同时缓释Cur抑制NF-κB通路,在机制上协同实现抗氧化、抗炎与抗纤维化,从而打破ROS驱动的炎症-纤维化循环。

三、研究内容

作者首先通过水热法合成约60 nm的CeMOF,并负载Cur后包覆HA形成HC@CeMOF,TEM/SEM显示颗粒均一,EDS证实元素均匀分布,XPS揭示Ce³⁺/Ce⁴⁺共存,XRD表明结构稳定未被破坏。

图1:HC@CeMOF的构建及结构表征。

进一步表征显示HC@CeMOF粒径约68 nm、Zeta电位约-5.7 mV,具有良好稳定性与分散性,同时Cur实现高效负载并呈现响应性释放,在透明质酸酶及ROS环境下释放加快。

图2:材料理化性质与药物释放行为。

体外实验表明HC@CeMOF具有良好细胞及血液相容性,同时可高效清除ABTS⁺、DPPH、PTIO、H₂O₂及O₂⁻等多种自由基,并显著降低细胞内ROS水平,同时抑制α-SMA与Collagen I表达并下调NF-κB活性。

图3:细胞相容性、ROS清除及抗纤维化作用。

在体内安全性评价中,HC@CeMOF连续给药28天未引起血常规、肝肾功能异常,主要脏器HE染色无明显损伤,显示良好的生物安全性。

图4:体内生物安全性评估。

机制研究与体内分布结果表明HA可与CD44稳定结合,HC@CeMOF在CP小鼠胰腺显著富集并长时间滞留,而HA阻断后靶向显著下降,同时材料在体内分布更集中于炎症部位。

图5:靶向能力与体内分布分析。

在CP模型中,HC@CeMOF显著改善胰腺组织结构,减少腺泡损伤和胶原沉积,组织学染色及免疫检测显示其显著抑制α-SMA与Collagen I表达,抗纤维化效果优于对照组。

图6:体内治疗效果及组织学评估。

进一步炎症分析显示HC@CeMOF显著降低TNF-α、IL-1β、IL-6等促炎因子并上调抗炎因子,同时抑制NF-κB通路活性,表明其通过抗氧化与抗炎协同重塑炎症微环境。

图7:体内抗炎作用及机制分析。

四、全文总结

本研究构建了HA靶向的Cur负载CeMOF纳米酶HC@CeMOF,通过HA-CD44实现炎症部位精准富集,利用Ce³⁺/Ce⁴⁺循环高效清除ROS并协同Cur抑制NF-κB信号,从而在慢性胰腺炎中实现抗氧化、抗炎与抗纤维化的多重协同调控,显著改善组织损伤与纤维化进程,为慢性炎症疾病提供了一种可行的纳米治疗策略。

声明文献阅读仅供交流学习,仅代表个人观点。如有侵权,请联系删除,欢迎大家投稿交流!若有疏漏不当之处,欢迎在留言区批评指正!

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  1. CONNECT:[ UseTime:0.000988s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001712s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000770s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000721s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001400s ]
  6. SELECT * FROM `set` [ RunTime:0.000612s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001712s ]
  8. SELECT * FROM `article` WHERE `id` = 512426 LIMIT 1 [ RunTime:0.001040s ]
  9. UPDATE `article` SET `lasttime` = 1778835395 WHERE `id` = 512426 [ RunTime:0.011402s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000610s ]
  11. SELECT * FROM `article` WHERE `id` < 512426 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000995s ]
  12. SELECT * FROM `article` WHERE `id` > 512426 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.014982s ]
  13. SELECT * FROM `article` WHERE `id` < 512426 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001831s ]
  14. SELECT * FROM `article` WHERE `id` < 512426 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003161s ]
  15. SELECT * FROM `article` WHERE `id` < 512426 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.003247s ]
0.149555s