食品科学 ›› 2019, Vol. 40 ›› Issue (24): 27-32.doi: 10.7506/spkx1002-6630-20190520-223

• 食品化学 • 上一篇    下一篇

补骨脂多糖的分离纯化、结构鉴定及其对RAW264.7巨噬细胞活力的影响

尹震花,张娟娟,陈林,郭庆丰,张伟,康文艺   

  1. (1.黄河科技学院 郑州市天然产物合成生物学重点实验室,郑州市药用资源研究重点实验室,河南 郑州 450063;2.河南省小分子新药研发国际联合实验室,河南 郑州 450063)
  • 出版日期:2019-12-25 发布日期:2019-12-24
  • 基金资助:
    国家自然科学基金青年科学基金项目(31501552);河南省科技厅产学研合作项目(182107000033); 河南省教育厅科学技术研究重点项目(18A360019)

Purification, Structural Identification and Effect on Cell Viability of RAW264.7 Macrophages of Polysaccharides from Psoralea corylifolia L. Fruits

YIN Zhenhua, ZHANG Juanjuan, CHEN Lin, GUO Qingfeng, ZHANG Wei, KANG Wenyi   

  1. (1. Zhengzhou Key Laboratory of Synthetic Biology of Natural Products, Zhengzhou Key Laboratory of Medicinal Resources Research,Huanghe S & T University, Zhengzhou 450063, China; 2. Henan Joint International Research Laboratory of Drug Discovery of Small Molecules, Zhengzhou 450063, China)
  • Online:2019-12-25 Published:2019-12-24

摘要: 对补骨脂多糖(Psoralea corylifolia polysaccharides,PPs)进行分离纯化,并对多糖的一般理化性质、单糖组成、摩尔质量、红外光谱、核磁共振(nuclear magnetic resonance,NMR)谱(1H-NMR和13C-NMR)、微观结构及其对RAW264.7活力的影响进行研究。利用热水提取乙醇沉淀,除蛋白,经DEAE-52纤维素色谱柱(0.05 mol/L NaCl溶液洗脱)和Sephadex G-100柱色谱分离纯化得到2 种多糖(PPs-1-1和PPs-2-1),均为白色絮状粉末,能溶于水,不溶于乙醇、正丁醇、丙酮、氯仿、石油醚等有机溶剂;考马斯亮蓝染色、斐林试剂反应、三氯化铁反应、碘-碘化钾反应均为阴性,总糖质量分数分别为(94.35±0.23)%和(95.27±0.42)%。PPs-1-1和PPs-2-1均由鼠李糖、阿拉伯糖、木糖、甘露糖、葡萄糖和半乳糖以不同物质的量比组成,平均摩尔质量分别为3.98×106 g/mol和4.47×106 g/mol;PPs-1-1具有表面光滑且致密的三维层流结构,具有α-和β-构型的呋喃糖苷;PPs-2-1具有表面疏松多孔的层状结构,具有β-构型的吡喃糖苷;PPs-1-1和PPs-2-1质量浓度分别低于0.16 μg/mL和0.01 μg/mL时,可明显激活RAW264.7巨噬细胞的活力。

关键词: 补骨脂, 多糖, 纯化, 结构鉴定, 细胞活力

Abstract: In this study, purified polysaccharides from the fruits of Psoralea corylifolia L. (PPs) were investigated for their general physicochemical properties, monosaccharide composition, molecular mass, infrared spectroscopic characteristics, nuclear magnetic resonance (1H-NMR and 13C-NMR) characteristics and microstructure together with their effects on the cell viability of RAW264.7 macrophages. The crude polysaccharides, obtained by hot water extraction and ethanol precipitation, were deproteinized by Sevag’s method and then fractionated into two polysaccharides (PPs-1-1 and PPs-2-1) by DEAE-52 with 0.05 mol/L NaCl as the eluent and Sephadex G-100 column chromatography. Both PPs-1-1 and PPs-2-1 were dried into a white flocculent powder, soluble in water but insoluble in ethanol, n-butanol, acetone, chloroform, petroleum ether and other organic solvents. They were negative to Coomassie brilliant blue staining, and reaction with Fehling reagent, ferric chloride and iodine-potassium iodide, and their total sugar contents were (94.35 ± 0.23)% and (95.27 ± 0.42)%, respectively. Both polysaccharides were composed of rhamnose, arabinose, xylose, mannose, glucose and galactose with different molar ratios, and their average molecular masses were 3.98 × 106 and 4.47 × 106 g/mol, respectively. PPs-1-1, showing a three-dimensional laminar structure with a smooth and dense surface, contained α-/β-furanosides. PPs-2-1, having β-pyranosides, exhibited a multilayer lamellar structure with loose and porous surface morphology. PPs-1-1 and PPs-2-1 at concentrations lower than 0.16 and 0.01 μg/mL, respectively could significantly activate RAW264.7 macrophages.

Key words: Psoralea corylifolia L., polysaccharides, purification, structure identification, cell viability

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