高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (3): 20250236.doi: 10.7503/cjcu20250236

• 研究论文: 无机化学 • 上一篇    下一篇

Dawson型多金属氧酸盐-VC复合物对 α-葡萄糖苷酶的抑制作用及机制研究

黄馨怡, 阙茂梅, 李瑶, 雷珊, 林思琪, 王力()   

  1. 集美大学海洋食品与生物工程学院,厦门 361021
  • 收稿日期:2025-08-28 出版日期:2026-03-10 发布日期:2025-11-26
  • 通讯作者: 王力 E-mail:wanglimerry@jmu.edu.cn
  • 基金资助:
    国家自然科学基金(22271119)

Inhibition Activity and Mechanism of Dawson-type Polyoxometalate-vitamin C Complexes against α -Glucosidase

HUANG Xinyi, QUE Maomei, LI Yao, LEI Shan, LIN Siqi, WANG Li()   

  1. College of Marine Food and Biological Engineering,Jimei University,Xiamen 361021,China
  • Received:2025-08-28 Online:2026-03-10 Published:2025-11-26
  • Contact: WANG Li E-mail:wanglimerry@jmu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22271119)

摘要:

合成、 表征了2类(母体及铁、 钴、 镍3种过渡金属取代的磷钼酸)共4种Dawson型磷钼酸化合物 H6[P2Mo18O62], H8[P2Mo17Fe(OH2)O61], H8[P2Mo17Co(OH2)O61]和H8[P2Mo17Ni(OH2)O61](以下简称为P2Mo18, P2Mo17Fe, P2Mo17Co和P2Mo17Ni), 进一步将Dawson型磷钼酸化合物与VC(VC)复合, 探究了复合物对α-葡萄糖苷酶的抑制作用.在此基础上, 通过Dawson型磷钼酸与VC以不同比例复合, 进行了相应的酶动力学实验, 考察了4种不同比例的Dawson型磷钼酸与VC复合物对α-葡萄糖苷酶的抑制效果, 并选取抑制效果最优的比例进行相应的抑制机理和抑制类型研究. 结果表明, 4种不同的Dawson型磷钼酸-VC复合物均对α-葡萄糖苷酶具有良好的抑制作用. 当P2Mo18-VC复合比例为5∶1, P2Mo17Fe-VC和P2Mo17Ni-VC复合比例为3∶1, P2Mo17Co-VC复合比例为2∶1时, 对α-葡萄糖苷酶的抑制效果最好, 4种Dawson型磷钼酸-VC复合物[P2Mo18, P2Mo17M-VC(M=Ni2+, Co2+, Fe2+)]均表现为可逆的混合型抑制. 研究结果表明, 4种多酸与VC复合物具有开发为α-葡萄糖苷酶抑制剂的潜力.

关键词: 多金属氧酸盐, α-葡萄糖苷酶, 维生素C, 酶动力学, 酶抑制剂

Abstract:

In this work, the inhibitory effects of Dawson-type polyoxometalates(POMs) complexed with vitamin C(VC) on α-glucosidase activity was investigated. Four Dawson-type phosphomolybdates were synthesized and characterized, including the parent compound H6[P2Mo18O62](P2Mo18) and three transition metal-substituted derivatives{H8[P2Mo17Fe(OH2)O61](P2Mo17Fe), H8[P2Mo17Co(OH2)O6(P2Mo17Co) and H8[P2Mo17Ni(OH2)O61(P2Mo17Ni)}. Enzyme kinetic studies revealed that all four POM-VC complexes exhibited significant inhibitory activity against α-glucosidase. The optimal inhibition ratios were determined to be 5∶1 for P2Mo18-VC, 3∶1 for P2Mo17Fe-VC and P2Mo17Ni-VC, and 2∶1 for P2Mo17Co-VC, with corresponding IC50 values of 0.194, 2.507, 2.809, and 5.332 mmol/L, respectively. Mechanistic studies demonstrated that these complexes functioned as reversible mixed-type inhibitors. These findings suggest the potential of Dawson-type POM-VC complexes as novel α-glucosidase inhibitors for diabetes management.

Key words: Polyoxometalates, α-Glucosidase, Vitamin C, Enzyme inhibition, Kinetic

中图分类号: 

TrendMD: