Changes in Epigallocatechin-3-0- (3-0-methyl) Gallate and Strictinin Contents of Tea (Camellia sinensis L.) Cultivar 'Benifuki' in Various Degrees of Maturity and Leaf Order

Maeda‐Yamamoto, Mari; Nagai, Hiroshi; Asai, K.; Moriwaki, Shinichi; Horie, Hideki; Kohata, Katsunori; Tachibana, Hirofumi; Miyase, Toshio; Sano, Mitsuaki

doi:10.3136/fstr.10.186

Cited by 28 publications

(18 citation statements)

References 40 publications

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“…In accord with the observation in the Benifuki tea cultivar [29], the content of strictinin in buds was higher than that in leaves of wild Pu'er tea trees examined in this study (Fig. 2).…”

Section: Discussionsupporting

confidence: 94%

Significant elevation of antiviral activity of strictinin from Pu'er tea after thermal degradation to ellagic acid and gallic acid

Chen

Lin

Hsu

et al. 2015

Journal of Food and Drug Analysis

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Compared with abundant catechins, strictinin is a minor constituent in teas and has been demonstrated to possess inhibitory potency on influenza virus. In this study, strictinin was found as the major phenolic compound in Pu'er teas produced from leaves and buds of wild trees. Due to its thermal instability, strictinin, in tea infusion or in an isolated form, was completely decomposed to ellagic acid and gallic acid after being autoclaved for 7 minutes. A plaque reduction assay was employed to compare the relative inhibitory potency between strictinin and its thermally degraded products against human influenza virus A/Puerto Rico/8/34. The results showed that the antiviral activity of ellagic acid regardless of the presence or absence of gallic acid was significantly higher than that of strictinin. Thermal degradation of strictinin to ellagic acid and gallic acid seems to be beneficial for the preparation of Pu'er teas in terms of enhancing antiviral activity.

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“…In accord with the observation in the Benifuki tea cultivar [29], the content of strictinin in buds was higher than that in leaves of wild Pu'er tea trees examined in this study (Fig. 2).…”

Section: Discussionsupporting

confidence: 94%

Significant elevation of antiviral activity of strictinin from Pu'er tea after thermal degradation to ellagic acid and gallic acid

Chen

Lin

Hsu

et al. 2015

Journal of Food and Drug Analysis

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“…After drying and milling all plucked shoots in each quadrat, the catechin, caffeine, amino acid, and total nitrogen (T‐N) contents were measured. Four catechin contents –epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and epigallocatechin gallate (EGCG) – and caffeine contents were measured using a high‐performance liquid chromatography (HPLC) system (LC‐10ADvp, Shimadzu Corp., Kyoto, Japan) according to previous reports . A 250 mg sample of milled material was extracted with 25 mL of a 2% phosphoric acid/ethanol (1 : 1) mixture at 30 °C for 60 min.…”

Section: Methodsmentioning

confidence: 99%

“…Four catechin contents -epicatechin (EC), epicatechin gallate (ECG), epigallocatechin (EGC), and epigallocatechin gallate (EGCG) -and caffeine contents were measured using a high-performance liquid chromatography (HPLC) system (LC-10ADvp, Shimadzu Corp., Kyoto, Japan) according to previous reports. 28,29 A 250 mg sample of milled material was extracted with 25 mL of a 2% phosphoric acid/ethanol (1 : 1) mixture at 30 ∘ C for 60 min. The filtrate was diluted with water and injected into the HPLC system.…”

Section: Quadrat Survey For Shoot and Leaf Traitsmentioning

confidence: 99%

Effect of shading intensity on morphological and color traits and on chemical components of new tea (Camellia sinensis L.) shoots under direct covering cultivation

et al. 2018

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“…In addition, NARO developed the Japanese tea cultivar Benifuuki, which is rich in O-methylated catechin [31][32][33][34][35][36][37], a compound that is present at low levels in common green tea and has anti-allergic effects [38][39][40][41][42]. O-methylated catechins relieve allergies by inhibiting the release of histamine from mast cells and basophils [31,33,37].…”

Section: Study Of Agricultural Products As Ffc By Naromentioning

confidence: 99%

Development of functional agricultural products utilizing the new health claim labeling system in Japan

Maeda‐Yamamoto

Ohtani

2018

Bioscience, Biotechnology, and Biochemistry

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In April 2015, Consumer Affairs Agency of Japan launched a new food labeling system known as "Foods with Function Claims (FFC)." Under this system, the food industry independently evaluates scientific evidence on foods and describes their functional properties. As of May 23, 2017, 1023 FFC containing 8 fresh foods have been launched. Meanwhile, to clarify the health-promoting effects of agricultural products, National Agriculture and Food Research Organization (NARO) implemented the "Research Project on Development of Agricultural Products" and demonstrated the risk reduction of osteoporosis of β-cryptoxanthin rich Satsuma mandarins and the anti-allergic effect of the O-methylated catechin rich tea cultivar Benifuuki. These foods were subsequently released as FFC. Moreover, NARO elucidated the health-promoting effects of various functional agricultural products (β-glucan rich barley, β-conglycinin rich soybean, quercetin rich onion, etc.) and a healthy boxed lunch. This review focuses on new food labeling system or research examining functional aspects of agricultural products.

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Changes in Epigallocatechin-3-0- (3-0-methyl) Gallate and Strictinin Contents of Tea (Camellia sinensis L.) Cultivar 'Benifuki' in Various Degrees of Maturity and Leaf Order

Cited by 28 publications

References 40 publications

Significant elevation of antiviral activity of strictinin from Pu'er tea after thermal degradation to ellagic acid and gallic acid

Significant elevation of antiviral activity of strictinin from Pu'er tea after thermal degradation to ellagic acid and gallic acid

Effect of shading intensity on morphological and color traits and on chemical components of new tea (Camellia sinensis L.) shoots under direct covering cultivation

Development of functional agricultural products utilizing the new health claim labeling system in Japan

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