Antioxidant activities of sea buckthorn leaf tea extracts compared with green tea extracts

Cho, Hyunnho; Cho, Eunae; Jung, Hwa Jin; Yi, Hae Chang; Lee, Bomee; Hwang, Keum Taek

doi:10.1007/s10068-014-0178-1

Cited by 21 publications

(19 citation statements)

References 29 publications

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“…At present, the use of buckwheat is mainly limited to its grains, which are made into a variety of foods and the buckwheat tea that is widely enjoyed by Asian and European countries [17,18,24]. Leaf tea, such as green tea, sea buckthorn leaf tea, jujube leaf tea, and peppermint leaf tea, is extremely popular because its constituent flavonoids have positive effects on health [25,26,27,28]. Buckwheat leaves are also rich in flavonoids, but the utilization is extremely inadequate.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Flavonoid Metabolites in Buckwheat Leaves Using UPLC-ESI-MS/MS

Yang

et al. 2019

Molecules

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Flavonoids from plants are particularly important in our diet. Buckwheat is a special crop that is rich in flavonoids. In this study, four important buckwheat varieties, including one tartary buckwheat and three common buckwheat varieties, were selected as experimental materials. The total flavonoid content of leaves from red-flowered common buckwheat was the highest, followed by tartary buckwheat leaves. A total of 182 flavonoid metabolites (including 53 flavone, 37 flavonol, 32 flavone C-glycosides, 24 flavanone, 18 anthocyanins, 7 isoflavone, 6 flavonolignan, and 5 proanthocyanidins) were identified based on Ultra Performance Liquid Chromatography–Electrospray Ionization–Tandem Mass Spectrometry (UPLC-ESI-MS/MS) system. Through clustering analysis, principal component analysis (PCA), and orthogonal signal correction and partial least squares-discriminant analysis (OPLS-DA), different samples were clearly separated. Considerable differences were observed in the flavonoid metabolites between tartary buckwheat leaves and common buckwheat leaves, and both displayed unique metabolites with important biological functions. This study provides new insights into the differences of flavonoid metabolites between tartary buckwheat and common buckwheat leaves and provides theoretical basis for the sufficient utilization of buckwheat.

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Section: Discussionmentioning

confidence: 99%

Analysis of Flavonoid Metabolites in Buckwheat Leaves Using UPLC-ESI-MS/MS

Yang

et al. 2019

Molecules

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“…wolongensis ranges from 29.8 to 38.8 mg GAE/g (GAE, gallic acid equivalents) [14], higher than that in mulberry (4.44 mg GAE/g) [15], pomegranate (3.90 mg GAE/g), red raspberries (3.00 mg GAE/g), blueberry (8.40 mg GAE/g) and blackberry (7.40 mg GAE/g) [16]. In addition, it has been reported that the total polyphenol content of sea buckhorn leaf (H. rhamnoides L., Korea) and green tea extracts (young tea leaves harvested in Jeju Island, Korea) ranged from 23.0 to 66.0 mg GAE/g and from 33.0 to 118.0 mg GAE/g, respectively [17]. However, compared with those of green tea from other regions (37.4 mg GAE/g; fresh tea leaves harvested in Guizhou Province, China), the polyphenol content of sea After a thorough literature search, we found that there is no comprehensive literature review on the antioxidant activity and mechanism of polyphenol compounds of Hippophae species.…”

Section: Chemical Constituents and Structures Of Polyphenolsmentioning

confidence: 99%

“…The analyses showed that sea buckthorn leaf tea extracts also upregulated the expression of Nrf2; the activation of the Nrf2/ARE antioxidant signaling pathway might play an important role in rescuing cell viability. However, further research is necessary to determine whether elevated Nrf2 expression results in an increase in antioxidant enzyme activity [17].…”

Section: Effects On Cell Antioxidant Responsesmentioning

confidence: 99%

Advanced Research on the Antioxidant Activity and Mechanism of Polyphenols from Hippophae Species—A Review

Gong

et al. 2020

Molecules

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Oxidation is a normal consequence of metabolism in biological organisms. The result is the formation of detrimental reactive oxygen species (ROS) and reactive nitrogen species (RNS). A large number of studies have shown that polyphenolic compounds have good antioxidant properties. Hippophae species plants have high polyphenolic content and are widely used in food, medicinal, or the cosmetic field. The main polyphenols in Hippophae species are flavonoids, phenolic acids and tannins, which have multiple effects. However, there is a limited number of studies on polyphenols in Hippophae species plants. This review systematically summarizes the polyphenols compounds and antioxidant activity of Hippophae species plants, and it is noteworthy that the main mechanisms of the polyphenols of Hippophae with antioxidant activity have been summarized as follows: regulating enzyme activity, affect the antioxidant reaction of cells, and others. This review provides useful information for the further study and application of Hippophae species polyphenols and their antioxidant activity.

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“…SBLs are rich in polyphenols composed of monomeric C ‐glycosidic ellagitannins (ETs) and flavonoids (Fatima et al., ; Suvanto & Salminen, ; Tian et al., ; Yoshida, Tanaka, Chen, & Okuda, ). The antioxidative capacity of the SBLs tea extract correlates to the polyphenol content (Cho et al., ). The highest concentration of total phenolics in the SBLs of Russian origin grown in Sweden is reported to be in the leaves harvested at the end of July (Morgenstern, Ekholm, Scheewe, & Rumpunen, ).…”

Section: Introductionmentioning

confidence: 99%

Untargeted metabolic fingerprinting reveals impact of growth stage and location on composition of sea buckthorn (Hippophaë rhamnoides) leaves

Pariyani

Kortesniemi

Liimatainen

et al. 2020

Journal of Food Science

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Sea buckthorn (Hippophaë rhamnoides) is increasingly cultivated to produce raw materials for food and nutraceuticals. There is little knowledge on composition of sea buckthorn leaves (SBLs) and the key factors influencing the composition. This research aims to unravel the metabolic profile of SBLs and the effects of cultivar, location and stage of growth, and climatic conditions on the metabolic profile of SBLs. Leaves of two sea buckthorn cultivars grown in the south and north of Finland during two consecutive growth seasons were studied using untargeted nuclear magnetic resonance (NMR) metabolomics. The highest variance in the metabolic profile was linked to the growth stage, wherein leaves from the first 7 weeks of harvest were characterized with higher abundance of polyphenols, while relatively higher abundance of carbohydrates and sugars was observed in the later weeks. The growth location attributed for the second highest variation, wherein the north-south comparison identified fatty acids and sugars as discriminatory metabolites, and the potential association of metabolome to natural abiotic stressors was revealed. An inverse correlation between carbohydrate/sugar content as well as fatty acids of higher carbon chain length with the temperature variables was evident. The supervised chemometric models with high sensitivity and specificity classified and predicted the samples based on growth stage and location, and cultivar. Nontargeted NMR-metabolomics revealed the metabolic profile of SBLs and their variation associated with various biotic and abiotic factors. Cultivar and growth stage are key factors to consider when harvesting SBLs for use in food and nutraceuticals.Practical Application: Globally, sea buckthorn cultivation has been rapidly increasing due to the known health-promoting benefits of the berries and leaves of the plant. The current research obtained new comprehensive information on the compositional profile of sea buckthorn leaves as well as the impact of major contributory factors, such as cultivars, the advancement of growth stage, geographical location, and weather parameters. The findings of this research provide new knowledge and guidance for plant breeding, cultivation and commercial utilization of sea buckthorn leaves as raw materials for food, feed, and nutraceuticals.

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Antioxidant activities of sea buckthorn leaf tea extracts compared with green tea extracts

Cited by 21 publications

References 29 publications

Analysis of Flavonoid Metabolites in Buckwheat Leaves Using UPLC-ESI-MS/MS

Analysis of Flavonoid Metabolites in Buckwheat Leaves Using UPLC-ESI-MS/MS

Advanced Research on the Antioxidant Activity and Mechanism of Polyphenols from Hippophae Species—A Review

Untargeted metabolic fingerprinting reveals impact of growth stage and location on composition of sea buckthorn (Hippophaë rhamnoides) leaves

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