高等学校化学学报 ›› 2024, Vol. 45 ›› Issue (1): 20230411.doi: 10.7503/cjcu20230411

• 有机化学 • 上一篇    下一篇

无金属黑色素纳米酶用于肝纤维化治疗

李婷婷1,2, 岳彩凤1, 霍媛青1, 纪慧芳1, 张瑞平3()   

  1. 1.山西医科大学药学院, 太原 030001
    2.山西医科大学第三医院, 山西白求恩医院, 山西医学科学院, 同济山西医院, 太原 030032
    3.山西省人民医院放射科, 山西医科大学第五医院, 太原 030012
  • 收稿日期:2023-09-15 出版日期:2024-01-10 发布日期:2023-11-21
  • 通讯作者: 张瑞平 E-mail:zrp_7142@sxmu.edu.cn
  • 基金资助:
    中国博士后科学基金(2022M722001);山西省自然科学研究面上项目(202103021224241);山西医科大学校博士启动基金(03201529)

Metal-free Melanin Nanoenzymes for the Treatment of Liver Fibrosis

LI Tingting1,2, YUE Caifeng1, HUO Yuanqing1, JI Huifang1, ZHANG Ruiping3()   

  1. 1.College of Pharmacy,Shanxi Medical University,Taiyuan 030001,China
    2.the Third Hospital of Shanxi Medical University,Shanxi Bethune Hospital,Shanxi Academy of Medical Science,Tongji Shanxi Hospital,Taiyuan 030032,China
    3.The Radiology Department of Shanxi Provincial People’s Hospital,the Fifth Hospital of Shanxi Medical University,Taiyuan 030012,China
  • Received:2023-09-15 Online:2024-01-10 Published:2023-11-21
  • Contact: ZHANG Ruiping E-mail:zrp_7142@sxmu.edu.cn
  • Supported by:
    the China Postdoctoral Science Foundation(2022M722001);the Natural Science Foundation of Shanxi Province, China(202103021224241);the Startup Foundation for Doctors of Shanxi Medical University, China(03201529)

摘要:

以5,6-二羟基吲哚为单体, 通过自由基聚合反应合成了无金属黑色素纳米酶(MeNPs), 并探究了其治疗肝纤维化的作用. 结果表明, MeNPs纳米酶为单分散球形结构, 粒径为(91.3±2.6) nm, 具有类超氧化物歧化酶(SOD)和类过氧化氢酶(CAT)活性, 其催化活性遵循典型的Michaelis-Menten动力学, Michaelis-Menten常数(Km)和最大反应速度(Vmax)分别为1.01 mmol/L和8.49×10-6 mol/(L·s). 细胞计数试剂盒(CCK-8)等体外细胞实验结果证实MeNPs对H2O2诱导的氧化应激具有细胞保护作用. 经MeNPs纳米酶治疗的肝纤维化小鼠的炎症因子 IL-6, TNF-α, IL-1β和趋化因子CXCL-1水平显著降低; 肝脏损伤指标ALT, AST和肝组织H&E染色均显示MeNPs干预肝纤维化的良好疗效. 本文研究结果对于构建安全、 高效的自由基清除纳米酶具有一定的指导意义, 也为肝纤维化的治疗提供了理论依据和物质基础.

关键词: 黑色素, 无金属纳米酶, 类超氧化物歧化酶, 类过氧化氢酶, 肝纤维化

Abstract:

Metal-free Melanin nanoenzymes(MeNPs) were synthesized via the free radical polymerization of 5,6-dihydroxyindole as monomer, and its therapeutic effect on liver fibrosis was explored. The results showed that the MeNPs nanoenzymes had monodisperse spherical structure with a particle size of (91.3±2.6) nm, with superoxide-like dismutase(SOD) and catalase-like(CAT) activities, and their catalytic activities followed typical Michaelis-Menten kinetics with Michaelis-Menten constant(Km) and maximum reaction velocity(Vmax) of 1.01 mmol/L and 8.49×10-6 mol/(L·s), respectively. In vitro cell experiments such as cell counting kit-8(CCK-8) confirmed that MeNPs had cytoprotective effects on H2O2-induced oxidative stress. Inflammatory factors IL-6, TNF-α, IL-1β and chemokine CXCL-1 were significantly reduced in the mouse model of liver fibrosis treated by MeNPs nanoenzymes. Liver damage indexes ALT, AST and H&E staining of liver tissue showed the good efficacy of MeNPs in liver fibrosis. The research has guiding significance for the construction of safe and efficient free radical scavenging nanoenzymes, and also provides a theoretical basis and material basis for the treatment of liver fibrosis.

Key words: Melanin, Metal-free nanoenzyme, Superoxide-like dismutase, Catalase-like, Liver fibrosis

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