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作 者:牛广俊 朱思[1] 陈清英[1] 陈天增 陈学圣 梁一池[1]
机构地区:[1]福建中医药大学药学院,福州350122 [2]漳平市展宏金花茶专业合作社,福建漳平364400
出 处:《中国实验方剂学杂志》2014年第20期168-172,共5页Chinese Journal of Experimental Traditional Medical Formulae
基 金:福建省科技厅重点项目(2011N1007);福建省龙岩市资助项目(201367)
摘 要:目的:测定金花茶不同部位的多糖含量并探讨其体外抗氧化活性的差异。方法:运用超声提取方法提取金花茶叶子、芽尖、果壳、花的多糖,采用苯酚-硫酸比色法测定多糖的含量,通过2,2'-联氮-(3-乙基苯并噻唑-6-磺酸)二铵盐(ABTS+)法、1,1-二苯基-2-三硝基苯肼(DPPH)检测法、邻苯三酚法和邻二氮菲法检测金花茶叶子、芽尖、果壳和花水提物的抗氧化能力,应用综合评分法,对各水提物的体外抗氧化活性进行综合评价。结果:金花茶花、叶、芽尖、果壳中多糖含量分别为32.88,29.48,35.89,30.02 g·kg-1;清除ABTS+自由基能力抗坏血酸(0.100 g·L-1)>花(0.135 g·L-1)>果壳(0.165 g·L-1)>芽尖(0.243 g·L-1)>叶(0.330 g·L-1);清除DPPH自由基能力顺序为抗坏血酸(0.200 g·L-1)>花(0.344 g·L-1)>果壳(0.435 g·L-1)>芽尖(0.881 g·L-1)>叶(1.011 g·L-1);超氧阴离子自由基抑制率抗坏血酸(0.2 g·L-1)≥芽尖(25.0 g·L-1)>果壳(25.0 g·L-1)>花(25.0 g·L-1)>叶(25.0 g·L-1);当生药浓度达到25.0 g·L-1时,花、芽尖、果壳对羟基自由基消除率均大于50%,但均小于抗坏血酸(2 g·L-1);综合评分为芽尖(55.05)>花(52.79)>果壳(51.97)>叶(23.73)。结论:苯酚-硫酸比色法测定金花茶不同部位的多糖含量稳定可行,金花茶水提物具有一定抗氧化能力且不同部位抗氧化能力存在明显的差异。Objective:To measure polysaccharide content in different parts of Camellia chrysanthaand explore the differences in antioxidant activity in vitro.Method:Extract polysaccharides from different parts of C.chrysantha by ultrasonic extraction,phenol-sulfuric acid method was used to determine polysaccharides content and measure antioxidant capacity in different parts of Camellia water extract by ABTS method,DPPH assay,pyrogallol method and phenanthroline assay.Result:C.chrysantha flowers,leaves,bud tip,husk polysaccharide contents were 32.88,29.48,35.89,30.02 g ·kg-1.The ability to clear ABTS+ ·order was ascorbic acid (0.100 g ·L^-1) flowers (0.135 g·L^-1) 〉nutshell (0.165 g·L^-1) 〉bud tip (0.243 g·L^-1) 〉leaf (0.330 g·L^-1),the ability to clear DPPH order was Ascorbic acid (0.200 g ·L^-1) 〉 flowers (0.344 g ·L^-1) 〉 nutshell (0.435 g · L^-1) 〉bud tip (0.881 g·L^-1) 〉leaf(1.011 g· L^-1).The ability of clear Superoxide anion radical order was Ascorbic acid (0.2 g·L^-1) ≥ bud tip (25.0 g·L^-1) 〉nutshell (25.0 g·L^-1) 〉flowers (25.0 g·L^-1) 〉 leaves (25.0 g ·L^-1).When crude drug concentration was 25 g ·L^-1,the flowers,the cusp,nutshell elimination rate of hydroxyl radicals were greater than 50%,however all were less than ascorbic acid (0.2 g · L^-1).The comprehensive score of bud tip (55.05) 〉 flowers (52.79) 〉 nutshell (51.97) 〉 leaf (23.73).Conclusion:Phenol-sulfuric acid colorimetry polysaccharide content in different parts of C.chrysantha was viable and stable and aqueous extract of C.chrysantha has a strong antioxidant capacity,the antioxidant capacity are significant differences and depend on different parts of C.chrysantha.
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