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Effects of extraction methods on immunology activity and chemical profiles of Lycium barbarum polysaccharides.
Journal of Pharmaceutical and Biomedical Analysis ( IF 3.1 ) Pub Date : 2020-02-29 , DOI: 10.1016/j.jpba.2020.113219
Wei Hao 1 , Shen-Fei Wang 1 , Jing Zhao 2 , Shao-Ping Li 1
Affiliation  

It has been proven that polysaccharides have bioactivities and are beneficial to cure many diseases. Lycium barbarum fruit is widely used as a functional food all over the world, which main active component is L. barbarum polysaccharides (LBPs). In this study, classical hot water extraction (HWE), microwave assisted extraction (MAE), ultrasonic assisted extraction (UAE) and pressurized liquid extraction (PLE) were used to extracted LBP. The chemical properties of LBPs were evaluated in terms of total polysaccharide contents, uronic acid contents and protein contents. High performance size exclusion chromatography coupled with multi angle laser light scattering and refractive index detector was applied to measure the characters such as molecular weight, radius of gyration and polydispersity index. Then the immunomodulatory activity of LBPs was evaluated through RAW 264.7 cells. The results showed that HWE was the best method to get the highest total sugar and acidic polysaccharides, MAE was preferable to extract polysaccharide-protein complex, but PLE, UAE and HWE could get better immunomodulatory activity polysaccharides than MAE. Besides, the peak 3 in chromatogram of MAE extracted LBPs was obviously higher than those of LBPs produced by other 3 extraction methods, which suggested that peak 1 and peak 2 might be biologically active polysaccharides fractions in LBPs. Therefore, effect of different extraction methods on structure and composition of LBPs attributed to their variance of immunological activities.

中文翻译:

提取方法对枸杞多糖免疫活性和化学特性的影响。

已经证明多糖具有生物活性,并且对于治疗许多疾病是有益的。枸杞果实在世界范围内被广泛用作功能食品,其主要活性成分是枸杞多糖(LBPs)。在这项研究中,经典热水提取(HWE),微波辅助提取(MAE),超声辅助提取(UAE)和加压液体提取(PLE)被用于提取LBP。根据总多糖含量,糖醛酸含量和蛋白质含量评估了LBP的化学性质。高性能尺寸排阻色谱结合多角度激光散射和折射率检测器,用于测量分子量,回转半径和多分散指数等特征。然后通过RAW 264.7细胞评估LBP的免疫调节活性。结果表明,HWE是获得最高总糖和酸性多糖的最佳方法,MAE是提取多糖-蛋白质复合物的首选,但是PLE,UAE和HWE比MAE具有更好的免疫调节活性。此外,MAE提取的LBP色谱图中的峰3明显高于其他3种提取方法产生的LBP,这表明峰1和峰2可能是LBP中具有生物活性的多糖馏分。因此,不同提取方法对LBPs结构和组成的影响归因于其免疫活性的变化。结果表明,HWE是获得最高总糖和酸性多糖的最佳方法,MAE是提取多糖-蛋白质复合物的首选,但是PLE,UAE和HWE比MAE具有更好的免疫调节活性。此外,MAE提取的LBP色谱图中的峰3明显高于其他3种提取方法产生的LBP,这表明峰1和峰2可能是LBP中具有生物活性的多糖馏分。因此,不同提取方法对LBPs结构和组成的影响归因于其免疫活性的变化。结果表明,HWE是获得最高总糖和酸性多糖的最佳方法,MAE是提取多糖-蛋白质复合物的首选,但是PLE,UAE和HWE比MAE具有更好的免疫调节活性。此外,MAE提取的LBP色谱图中的峰3明显高于其他3种提取方法产生的LBP,这表明峰1和峰2可能是LBP中具有生物活性的多糖馏分。因此,不同提取方法对LBPs结构和组成的影响归因于其免疫活性的变化。MAE提取的LBP色谱图中的峰3明显高于其他3种提取方法产生的LBP,这表明峰1和峰2可能是LBP中具有生物活性的多糖馏分。因此,不同提取方法对LBPs结构和组成的影响归因于其免疫活性的变化。MAE提取的LBP色谱图中的峰3明显高于其他3种提取方法产生的LBP,这表明峰1和峰2可能是LBP中具有生物活性的多糖馏分。因此,不同提取方法对LBPs结构和组成的影响归因于其免疫活性的变化。
更新日期:2020-03-02
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