Isolation, structure characteristics and antioxidant activity of two water-soluble polysaccharides from Lenzites betulina

BMC Chemistry

Junmin Wang¹  Yan Hua¹  Jiayu Ma¹  Lei Guo²  Hongwei Dai³  Lingyun Zhou⁴ 

[1] Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, People’s Republic of China;Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming, People’s Republic of China;School of Life Science, Southwest Forestry University, Kunming, People’s Republic of China;School of Life Science, Southwest Forestry University, Kunming, People’s Republic of China;School of Pharmacy, Wannan Medical College, Wuhu, People’s Republic of China;

关键词: Lenzites betulina;    Polysaccharides;    Deproteinization;    Purification;    Structure characteristics;    Antioxidant activity;   

DOI  :  10.1186/s13065-021-00741-6

来源: Springer

【 摘 要 】

BackgroundFungal polysaccharides belong to a very important class of biological macromolecules in nature, and have complex monosaccharide composition and structure. These studies on structure and biological activity of fungal polysaccharides have become one of the research hotspots of scholars at home and abroad.ResultsThis study was performed in order to understand the structural characteristics and antioxidant activity of polysaccharides from Lenzites betulina (LBPs). The LBPs were deproteinized using sevag method, and further purified by DEAE cellulose-52 column and Sephadex G-100 column chromatographies, then the two refined polysaccharides were obtained and named LBPs-5 and LBPs-6. Fourier transform infrared spectrometry (FT-IR) showed that LBPs-5 and LBPs-6 are typical β-pyranose with characteristic peaks of polysaccharides. The molecular weight of the two water-soluble polysaccharides were estimated to be 3.235 × 103 Da and 6.196 × 103 Da by HPGPC, respectively. HPLC with PMP derivatization analysis indicated that the monosaccharide compositions of LBPs-5 were mannose, glucuronic acid, glucose, and galactose in a molar ratio of 0.05:0.15:0.76:0.04. The monosaccharide compositions of LBPs-6 were mannose, glucuronic acid, and glucose, in a molar ratio of 0.04:0.17:0.79. Furthermore, the two water-soluble polysaccharides demonstrated strong scavenging effects on DPPH·, ABTS·+, ·OH and weak total reducing power, especially LBPs-6 was significantly stronger in scavenging rate than that of LBPs-5.ConclusionsThe outcome of the study indicated that LBPs had good potential as medicine and food.

【 授权许可】

CC BY