Identification of galloylated propelargonidins and procyanidins in buckwheat grain and quantification of rutin and flavanols from homostylous hybrids originating from F. esculentum×F. homotropicum

Ölschläger, Carolin; Regos, Ionela; Zeller, F. J.; Treutter, D.

doi:10.1016/j.phytochem.2008.01.001

Cited by 46 publications

(44 citation statements)

References 28 publications

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“…Contents of other major phenolic acids and fl avonoids were decreasing in the following order: vitexin > chlorogenic acid > hyperoside > caffeic acid > orietin > quercetin > epicatechin (from 4.98 to 1.59 mg/100 g seeds). These values were in agreement with literature data [Zielińska et al, 2007;Ölschläger et al, 2008;Kiprovski et al, 2015].…”

Section: Resultssupporting

confidence: 93%

“…Flavones determined in the present study ( [1999] reported that homoorientin, orientin, vitexin and isovitexin were presented in buckwheat hulls, whereas only isovitexin occurred in dehulled seeds. Flavan-3-ols and their derivatives, like glycosides and oligomers (procyanidins and propelargonidins) and galloyol esters, were the most numerous group of phenolic compounds in seeds of common buckwheat [Watanabe, 1998;Ölschläger et al, 2008;Inglett et al, 2011]. Verardo et al [2010] noted on as many as 18 compounds belonging to this group, whereas Ölschläger et al, [2008] determined 13 fl avan-3-ols and their derivatives, including mainly di-and trimers.…”

Section: Resultsmentioning

confidence: 99%

“…Buckwheat seeds contain low molecular weight (LMW) phenolics -phenolic acids and fl avonoids [Verardo et al, 2010; Inglett et al, 2011] and condensed tannins with high molecular weights (HMW) [Watanabe et al, 1997;Karamać, 2007]. The predominating LMW phenolic compound is rutin (quercetin-3-O-rutinoside) [Zielińska et al, 2007;Ölschläger et al, 2008;Kiprovski et al, 2015]. In a study by Jiang et al [2007], rutin contribution in seeds of F. esculentum reached 0.02% and was found to play a signifi cant role in the antioxidant capacity of buckwheat seeds.…”

Section: Introductionmentioning

confidence: 99%

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Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

Karamać¹,

Biskup²,

Kulczyk³

2015

Pol. J. Food Nutr. Sci.

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Five fractions of phenolic compounds were obtained from the extract of common buckwheat seed (Fagopyrum esculentum Moench) using Sephadex LH-20 column chromatography with methanol as a mobile phase. The total phenolics content ranged from 19.8±1.5 (fraction I) to 164±2.2 mg (+)-catechin eq/g (fraction IV). The profi les of phenolic acids and fl avonoids in the fractions were analysed using RP-HPLC-DAD. The antioxidant activity was tested as ABTS •+ and DPPH • scavenging activity and capability to reduce the Fe(III)/2,4,6-Tris(2-pyridyl)-s-triazine complex to the ferrous form. Results were expressed as Trolox equivalent antioxidant capacity (TEAC), IC 50 and ferric reducing antioxidant power (FRAP) values, respectively. The highest antioxidant activity was noted for fraction IV that was predominated by fl avones. TEAC, IC 50 and FRAP values were: 1.47±0.01 mmol Trolox eq/g, 0.058±0.003 mg/assay and 2.18±0.05 mmol Fe(II)/g, respectively. Rutin constituted 77.7% of the compounds identifi ed in fraction III. The antiradical activity and reducing capability of this fraction were lower compared to fraction IV, but signifi cantly higher than in fractions I and II. The main phenolic compounds of fractions I and II were phenolic acids (caffeic, 5-O-caffeoylquinic and p-coumaric). The antioxidant activity of fraction V was similar to that of fraction III. Unauthenticated Download Date | 5/11/18 5:42 PM

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

Karamać¹,

Biskup²,

Kulczyk³

2015

Pol. J. Food Nutr. Sci.

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“…The amounts of the two components were decreased to less than 10% of their original concentrations by the incubation of the acidic suspension of BWF with 1 mM nitrite for 20 min. The above results suggest that both propelargonidins and procyanidins, which were present in the suspension of BWF [17], were oxidized by nitrite under acidic conditions.…”

Section: Resultsmentioning

confidence: 73%

“…ProA of BWF consists of pelargonidin and cyanidin [17]. Then the decrease in the concentrations of ProA was also studied by measuring the decrease in concentrations of pelargonidin and cyanidin.…”

Section: Quantification Of Proamentioning

confidence: 99%

Proanthocyanidins in Buckwheat Flour Can Reduce Salivary Nitrite to Nitric Oxide in the Stomach

Takahama

Tanaka

Hirota

2009

Plant Foods Hum Nutr

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Buckwheat flour, which is used for various dishes in the world, is a good source of proanthocyanidins. Proanthocyanidins in the buckwheat flour reduced nitrous acid producing nitric oxide (NO) when the flour was suspended in acidified saliva or in acidic buffer solution in the presence of nitrite. The ingestion of dough prepared from buckwheat flour increased the concentration of NO in the air expelled from the stomach, suggesting that the proanthocyanidins also reduced nitrite to NO in the stomach. During the production of NO by the buckwheat flour/nitrous acid systems, oxidation, nitration, and nitrosation of proanthocyanidins proceeded. The increase in the concentration of NO could improve the activity of stomach helping the digestion of ingested foods and the nitration and nitrosation of the proanthocyanidins could contribute to the scavenging of reactive nitrogen oxide species generated from NO and nitrous acid.

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The exploration of neuraminidase inhibitory activity on Fallopia denticulata, an ethnic herb in China

Zheng

Zhang

Cao

et al. 2020

Biomedical Chromatography

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This study was designed to explore the bioactive ingredients in the extracts of Fallopia denticulata (C.C. Huang) Holub, a medicinal plant grown in China, which exhibits the best neuraminidase (NA) inhibition activity. Three fractions of ethyl acetate, ethanol, and water were tested on NA inhibition assay, and the best one was conducted by ultra‐performance liquid chromatography–time‐of‐flight mass spectrometry in the negative and positive modes to analyze the metabolic components. The results revealed the identification of the following 21 compounds: 3 organic acids, 11 flavonoids, 1 coumarin, and 6 others, such as β‐daucosterol, gallic acid, and syringic acid, of which 12 compounds were discovered for the first time in F. denticulata. In addition, we used the molecular docking technique to support the anti‐NA activity of each compound in the best extract. The results confirmed that the two better bioactive compounds were (−)‐epicatechin gallate and (+)‐catechin. Therefore, F. denticulata could be used as a potential material for new anti‐influenza drugs.

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Identification of galloylated propelargonidins and procyanidins in buckwheat grain and quantification of rutin and flavanols from homostylous hybrids originating from F. esculentum×F. homotropicum

Cited by 46 publications

References 28 publications

Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

Fractionation of Buckwheat Seed Phenolics and Analysis of Their Antioxidant Activity

Proanthocyanidins in Buckwheat Flour Can Reduce Salivary Nitrite to Nitric Oxide in the Stomach

The exploration of neuraminidase inhibitory activity on Fallopia denticulata, an ethnic herb in China

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