Antihyperglycemic, Antiaging, and L. brevis Growth-Promoting Activities of an Exopolysaccharide from Agrobacterium sp. FN01 (Galacan) Evaluated in a Zebrafish (Danio rerio) Model

文献类型： 外文期刊

第一作者： Xu, Xiaoqing

作者： Xu, Xiaoqing;Qiao, Yu;Peng, Qing;Shi, Bo;Du, Lingling;Wang, Meng;Zhang, Ran;Shan, Junjie

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关键词： exopolysaccharide; Agrobacterium sp. FN01; antihyperglycemic; antiaging; L. brevis growth

期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）

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年卷期： 2024 年 13 卷 17 期

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收录情况： SCI

摘要： Agrobacterium sp. are notable for their ability to produce substantial amounts of exopolysaccharides. Our study identified an exopolysaccharide (Galacan, 4982.327 kDa) from Agrobacterium sp. FN01. Galacan is a heteropolysaccharide primarily composed of glucose and galactose at a molar ratio of 25:1. The FT-IR results suggested that Galacan had typical absorption peaks of polysaccharide. The results of periodate oxidation, Smith degradation, and NMR confirmed the presence of structural units, such as beta-D-Galp(->, -> 3)beta-D-Galp(1 ->, -> 2,3)beta-D-Glcp(1 ->, beta-D-Glcp(1 ->, and -> 2)beta-D-Glcp(1 ->. Galacan demonstrated significant biological activities. In experiments conducted with zebrafish, it facilitated the proliferation of Lactobacillus brevis in the intestinal tract, suggesting potential prebiotic properties. Moreover, in vivo studies revealed its antihyperglycemic effects, as evidenced by significant reductions in blood glucose levels and enhanced fluorescence intensity of pancreatic beta cells in a streptozotocin (STZ)-induced hyperglycemic zebrafish model. Additionally, antiaging assays demonstrated Galacan's ability to inhibit beta-galactosidase activity and enhance telomerase activity in a hydrogen peroxide (HP)-induced aging zebrafish model. These findings emphasized the potential of Galacan as a natural prebiotic with promising applications in diabetes prevention and antiaging interventions.

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