Purification and Characterization of Polyphenols from Chestnut Astringent Skin

Tsujita, Takahiro; Yamada, Masahiro; Takaku, Takeshi; Shintani, Tomoyoshi; Teramoto, Kanae; Sato, Takafumi

doi:10.1021/jf201679q

Cited by 24 publications

(33 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nut polyphenols could also limit glycaemia by inhibiting carbohydrate digestion. Almond and chestnut tannins were identified as potent α-amylase inhibitors and were confirmed to reduce blood glucose in rats fed maize (corn) starch ( 102 , 103 ) .…”

Section: Health Benefits Of Nutsmentioning

confidence: 99%

Review of nut phytochemicals, fat-soluble bioactives, antioxidant components and health effects

2015

View full text Add to dashboard Cite

The levels of phytochemicals (total phenols, proanthocyanidins, gallic acid þ gallotannins, ellagic acid þ ellagitannins, flavonoids, phenolic acids, stilbenes and phytates), fat-soluble bioactives (lipid, tocols, phytosterols, sphingolipids, carotenoids, chlorophylls and alkyl phenols) as well as natural antioxidants (nutrient and non-nutrient) present in commonly consumed twelve nuts (almond, Brazil nut, cashew, chestnut, hazelnut, heartnut, macadamia, peanut, pecan, pine nut, pistachio and walnut) are compared and reported. Recent studies adding new evidence for the health benefits of nuts are also discussed. Research findings from over 112 references, many of which have been published within last 10 years, have been compiled and reported.

show abstract

Section: Health Benefits Of Nutsmentioning

confidence: 99%

Review of nut phytochemicals, fat-soluble bioactives, antioxidant components and health effects

2015

View full text Add to dashboard Cite

show abstract

“…1 Polyphenolic compounds from chestnut skin tissue exhibit strong α-amylase inhibitory activity that may be derived from oligomeric proanthocyanidins with gallic acid and ellagic acid. 7 Chestnut extract has been shown to play a significant role in the gastric tolerance improvement of Lactobacillus acidophilus, probably due to hydrophobic peptides or oligopeptides that may impart a marked resistance to simulated gastric juice. 8 Cultivars of various chestnut species share several common sensory attributes, but differ in intensity ratings of six descriptors.…”

Section: ■ Introductionmentioning

confidence: 99%

Transcriptomic Identification and Expression of Starch and Sucrose Metabolism Genes in the Seeds of Chinese Chestnut (Castanea mollissima)

Zhang

Lin

Feng

et al. 2015

J. Agric. Food Chem.

View full text Add to dashboard Cite

The Chinese chestnut (Castanea mollissima) seed provides a rich source of carbohydrates as food and feed. However, little is known about starch biosynthesis in the seeds. The objectives of this study were to determine seed composition profiles and identify genes involved in starch and sucrose metabolism. Metabolite analysis showed that starch was the major component and rapidly accumulated during seed endosperm development. Amylopectin was approximately 3-fold of amylose content in chestnut starch. Illumina platform-based transcriptome sequencing generated 56671 unigenes in two cDNA libraries from seed endosperms collected at 45 and 75 days after flowering (DAF). A total of 1537 unigenes showed expression differences ≥2-fold in the two stages of seeds including 570 up-regulated and 967 down-regulated unigenes. One hundred and fifty-two unigenes were identified as involved in starch and sucrose metabolism, including 1 for glycogenin glucosyltransferase, 4 for adenylate transporter (brittle1-type), 3 for ADP-glucose pyrophosphorylase (AGP, not brittle2- or shrunken2-type), 3 for starch synthase (SS), 2 for starch branching enzyme, 5 for starch debranching enzyme, 11 for sucrose synthase, and 3 for sucrose-phosphate synthase. Among them, 58 unigenes showed a ≥2-fold expression difference between the 45 and 75 DAF seeds including 11 up- and 47 down-regulated unigenes. The expression of 21 unigenes putatively coding for major enzymes in starch and sucrose metabolism was validated by qPCR using RNA from five seed stages. Expression profiles and correlation analysis indicated that the mRNA levels of AGP (large and small subunits), granule-bound SS2, and soluble SS1 and SS4 were well-correlated with starch accumulation in the seeds. This study suggests that the starch biosynthesis pathway in Chinese chestnut is similar to that of potato tuber/Arabidopsis leaf and differs from that of maize endosperm. The information provides valuable metabolite and genetic resources for future research in starch and sucrose metabolism in Chinese chestnut tree.

show abstract

“…Hence, it becomes important to screen extracts for the detection of phytochemicals. [29,30,[36][37][38][39][40][41] In the present study, we screened methanolic leaf extract of R. steudneri for phytochemicals, and the result of preliminary phytochemical analysis of leaf extract is shown in Table 1. In the leaf extract, all phytochemicals except glycosides, phytosterols, and triterpenoids were presented.…”

Section: Results and Discussion Phytochemicals Detected In Leaf Extrmentioning

confidence: 99%

Untitled

Raghavendra¹

2018

IJGP

View full text Add to dashboard Cite

Objectives: Free radical is a molecular species that contain an unpaired electron in an atomic orbital. Free radicals are highly reactive, capable of damaging biomolecules such as proteins, nucleic acid, and lipids, and cause oxidative damage. The present study was carried out to determine antiradical and lipid peroxidation inhibitory activity of leaf extract of Rubus steudneri Schweinf. belonging to the family Rosaceae. Materials and Methods: Extraction of powdered leaf material was carried out by maceration process. Leaf extract was subjected to preliminary phytochemical analysis by standard tests. Leaf extract was screened for antiradical (2,2-diphenyl-1-picrylhydrazyl [DPPH] and hydroxyl radical scavenging assay) and lipid peroxidation inhibition activity. Total phenolic and flavonoid content was estimated by Folin-Ciocalteu reagent method and aluminum chloride colorimetric estimation method, respectively. Results: Phytochemicals, namely, saponins, alkaloids, flavonoids, and tannins were detected in the leaf extract. The extract was shown to scavenge DPPH and hydroxyl radicals dose dependently with IC 50 value 49.99 µg/ml and 15.19 µg/ml, respectively. Inhibition of lipid peroxidation by leaf extract was also dose dependent (IC 50 value 27.72 µg/ml). The content of total phenolics and flavonoids was found to be 133.51 mg gallic acid equivalents/100 g of extract and 80.61 mg catechin equivalents/100 g of extract, respectively. Conclusion: The leaf extract of R. steudneri exhibited a marked concentration-dependent antiradical and lipid peroxidation inhibitory activity which can be attributed to the phenolic and flavonoid content. The plant can be used for the prevention and management of oxidative damage induced by free radicals.

show abstract

Purification and Characterization of Polyphenols from Chestnut Astringent Skin

Cited by 24 publications

References 34 publications

Review of nut phytochemicals, fat-soluble bioactives, antioxidant components and health effects

Review of nut phytochemicals, fat-soluble bioactives, antioxidant components and health effects

Transcriptomic Identification and Expression of Starch and Sucrose Metabolism Genes in the Seeds of Chinese Chestnut (Castanea mollissima)

Untitled

Contact Info

Product

Resources

About