Background:Vine tea from fermented Ampelopsis grossedentata leaves has been used as a herbal tea and folk medicine in the southern region of China for hundreds of years.The aim of this investigation was to analyze the...Background:Vine tea from fermented Ampelopsis grossedentata leaves has been used as a herbal tea and folk medicine in the southern region of China for hundreds of years.The aim of this investigation was to analyze the total flavonoids found in vine tea,including three bioactive flavonoids,and the total phenolic contents in the aqueous methanol extracts of 10 vine tea samples.In addition,this study also aimed to examine the antioxidant activity of dihydromyricetin and vine tea’s flavonoid-rich extract.Methods:The total flavonoids and total phenolic content assay of extracts from vine tea were performed by ultraviolet-visible spectroscopy and epoch microplate spectrophotometer,respectively.Three bioactive flavonoids were quantified simultaneously using high performance liquid chromatography.The antioxidant activity of dihydromyricetin and vine tea’s flavonoid-rich extract was evaluated in vitro using six different methods.Results:Vine tea contained a large number of flavonoids,with dihydromyricetin as its main constituent.The flavonoid-rich extract exhibited a significant scavenging effect on superoxide anion radicals,and on 3-ethylbenzthiazoline-6-sulphonic acid and 1,1-diphenyl-2-picrylhydrazyl radicals.It also possessed definite activity in lipid peroxidation inhibition,ferric reduction,and the moderation of Fe2+ion chelation ability.There was a significant negative correlation between dihydromyricetin content and antioxidant activity in the vine tea samples,including superoxide anion radical scavenging activity(P=−0.754,P<0.05),lipid peroxidation inhibition activity(P=−0.759,P<0.05),ferric-reducing antioxidant power(P=−0.843,P<0.01),respectively.Dihydromyricetin played a dominant role in the antioxidant activities of the flavonoid-rich extract.Conclusion:Vine tea’s flavonoid-rich extract could be used as a new antioxidant source to safeguard against oxidative stress.展开更多
对我国别样茶(Other Kinds of Tea)中藤茶的古今应用历史以及现代研究等方面进行调查,为进一步的深入研究和开发提供参考。藤茶在我国南方民间应用历史悠久,应用范围广泛,具有别样茶的特征。现代化学研究表明藤茶中主要含有黄酮类成分,...对我国别样茶(Other Kinds of Tea)中藤茶的古今应用历史以及现代研究等方面进行调查,为进一步的深入研究和开发提供参考。藤茶在我国南方民间应用历史悠久,应用范围广泛,具有别样茶的特征。现代化学研究表明藤茶中主要含有黄酮类成分,以二氢杨梅素含量最高,药理活性研究表明藤茶具有消炎抗菌、抗肿瘤、保肝、降血糖降血脂等活性。因此藤茶是预防、防治慢性代谢性疾患非常有前景的一个研究对象。对藤茶进行深入整理研究,不仅能够对我国茶文化多样性研究起到推动作用,也能够为防治慢性代谢性疾病的新药开发提供线索。展开更多
基金This work was supported by Traditional Chinese Medicine Science and Technology Development Project of Shandong Province(No.2019-0649)Fundamental Research Funds for the Central Universities(No.2018-BUCMXJKY001).
文摘Background:Vine tea from fermented Ampelopsis grossedentata leaves has been used as a herbal tea and folk medicine in the southern region of China for hundreds of years.The aim of this investigation was to analyze the total flavonoids found in vine tea,including three bioactive flavonoids,and the total phenolic contents in the aqueous methanol extracts of 10 vine tea samples.In addition,this study also aimed to examine the antioxidant activity of dihydromyricetin and vine tea’s flavonoid-rich extract.Methods:The total flavonoids and total phenolic content assay of extracts from vine tea were performed by ultraviolet-visible spectroscopy and epoch microplate spectrophotometer,respectively.Three bioactive flavonoids were quantified simultaneously using high performance liquid chromatography.The antioxidant activity of dihydromyricetin and vine tea’s flavonoid-rich extract was evaluated in vitro using six different methods.Results:Vine tea contained a large number of flavonoids,with dihydromyricetin as its main constituent.The flavonoid-rich extract exhibited a significant scavenging effect on superoxide anion radicals,and on 3-ethylbenzthiazoline-6-sulphonic acid and 1,1-diphenyl-2-picrylhydrazyl radicals.It also possessed definite activity in lipid peroxidation inhibition,ferric reduction,and the moderation of Fe2+ion chelation ability.There was a significant negative correlation between dihydromyricetin content and antioxidant activity in the vine tea samples,including superoxide anion radical scavenging activity(P=−0.754,P<0.05),lipid peroxidation inhibition activity(P=−0.759,P<0.05),ferric-reducing antioxidant power(P=−0.843,P<0.01),respectively.Dihydromyricetin played a dominant role in the antioxidant activities of the flavonoid-rich extract.Conclusion:Vine tea’s flavonoid-rich extract could be used as a new antioxidant source to safeguard against oxidative stress.
文摘对我国别样茶(Other Kinds of Tea)中藤茶的古今应用历史以及现代研究等方面进行调查,为进一步的深入研究和开发提供参考。藤茶在我国南方民间应用历史悠久,应用范围广泛,具有别样茶的特征。现代化学研究表明藤茶中主要含有黄酮类成分,以二氢杨梅素含量最高,药理活性研究表明藤茶具有消炎抗菌、抗肿瘤、保肝、降血糖降血脂等活性。因此藤茶是预防、防治慢性代谢性疾患非常有前景的一个研究对象。对藤茶进行深入整理研究,不仅能够对我国茶文化多样性研究起到推动作用,也能够为防治慢性代谢性疾病的新药开发提供线索。
