整合生物学期刊网

应用天然产物 ›› 2023, Vol. 13 ›› Issue (3): 18-18.DOI: 10.1007/s13659-023-00384-1

• Articles • 上一篇    下一篇

Structural characterizations and α-glucosidase inhibitory activities of four Lepidium meyenii polysaccharides with different molecular weights

Luan Wen1,2, Zhou-Wei Wu1,2, Li-Wu Lin1,2, Abdulbaset Al-Romaima1,2, Xing-Rong Peng1,2, Ming-Hua Qiu1,2   

  1. 1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, People’s Republic of China;
    2. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
  • 收稿日期:2023-05-05 出版日期:2023-06-24 发布日期:2023-07-18
  • 通讯作者: Ming-Hua Qiu,E-mail:mhchiu@mail.kib.ac.cn
  • 基金资助:
    The research work was financially supported by the National Natural Science Foundation of China (No. 31872675), as well as the Cooperation Project with DR PLANT Company (2023).

Structural characterizations and α-glucosidase inhibitory activities of four Lepidium meyenii polysaccharides with different molecular weights

Luan Wen1,2, Zhou-Wei Wu1,2, Li-Wu Lin1,2, Abdulbaset Al-Romaima1,2, Xing-Rong Peng1,2, Ming-Hua Qiu1,2   

  1. 1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, People’s Republic of China;
    2. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
  • Received:2023-05-05 Online:2023-06-24 Published:2023-07-18
  • Contact: Ming-Hua Qiu,E-mail:mhchiu@mail.kib.ac.cn
  • Supported by:
    The research work was financially supported by the National Natural Science Foundation of China (No. 31872675), as well as the Cooperation Project with DR PLANT Company (2023).

摘要: Four polysaccharides (MCPa, MCPb, MCPc, MCPd) were obtained from Lepidium meyenii Walp. Their structures were characterized by chemical and instrumental methods including total sugar, uronic acid and protein content determination, UV, IR and NMR spectroscopy, as well as monosaccharide composition determination and methylation analyses. Four polysaccharides were a group of glucans with different molecular weights ranging from 3.12 to 14.4 kDa, and shared a similar backbone chain consisting of (1→4)-glucose linkages with branches attached to C-3 and C-6. Furthermore, bioactivity assay showed that MCPs had concentration-dependent inhibitory activity on α-glucosidase. MCPb (Mw=10.1 kDa) and MCPc (Mw=5.62 kDa) with moderate molecular weights exhibited higher inhibitory activity compared with MCPa and MCPd.

关键词: Lepidium meyenii, Polysaccharide, Molecular weight, Structural characterization, α-Glucosidase inhibition

Abstract: Four polysaccharides (MCPa, MCPb, MCPc, MCPd) were obtained from Lepidium meyenii Walp. Their structures were characterized by chemical and instrumental methods including total sugar, uronic acid and protein content determination, UV, IR and NMR spectroscopy, as well as monosaccharide composition determination and methylation analyses. Four polysaccharides were a group of glucans with different molecular weights ranging from 3.12 to 14.4 kDa, and shared a similar backbone chain consisting of (1→4)-glucose linkages with branches attached to C-3 and C-6. Furthermore, bioactivity assay showed that MCPs had concentration-dependent inhibitory activity on α-glucosidase. MCPb (Mw=10.1 kDa) and MCPc (Mw=5.62 kDa) with moderate molecular weights exhibited higher inhibitory activity compared with MCPa and MCPd.

Key words: Lepidium meyenii, Polysaccharide, Molecular weight, Structural characterization, α-Glucosidase inhibition