Distribution of catechins in Japanese seaweeds

Yoshie, Yumiko; Wang, Wei; Petillo, David; Suzuki, Takeshi

doi:10.1046/j.1444-2906.2000.00160.x

Cited by 90 publications

(57 citation statements)

References 16 publications

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“…The phenolic content in the EtOAc fraction of H. musciformis was significantly higher (205.5 mg GAE/g) compared to H. valentiae and J. rubens (72.9 & 37.2 mg GAE/g, respectively) (P <0.05) ( Table 2). There are earlier reports that substantiate our present observation that solvent extracts of Hypnea sp and other red seaweeds are good resources of polyphenolic compounds (Pavia and Aberg 1996;Yoshie et al 2000).…”

Section: Total Phenolic Content In Red Seaweed Extracts and Fractionssupporting

confidence: 80%

Antioxidant activities and phenolic contents of three red seaweeds (Division: Rhodophyta) harvested from the Gulf of Mannar of Peninsular India

2013

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The antioxidant activities of methanol extract and its solvent fractions (n -hexane, dichloromethane and ethyl acetate) of three red seaweeds (Hypnea musciformis , H. valentiae , and Jania rubens ) collected from the Gulf of Mannar of South eastern coast of India were evaluated, using different in vitro systems, viz., DPPH, ABTS, HO radical scavenging activities, H 2 O 2 scavenging ability, Fe 2+ ion chelating ability and reducing potential. Folin-Ciocalteu method was used to determine the total phenolic content of the extracts/fractions, and the results were expressed as mg of gallic acid equivalent (GAE)/g of the seaweed extracts/ fractions. Thiobarbituric acid-reactive substances (TBARS) inhibition assay was employed to assess the ability of the seaweed extracts/fractions to inhibit lipid oxidation. Ethyl acetate (EtOAc) fractions of H. musciformis exhibited significantly higher total phenolic content (205.5 mg GAE/g), DPPH· scavenging activity (IC 50 0.6 mg/mL), ABTS .+ scavenging activity (IC 50 0.51 μg/mL), Fe 2+ chelating ability (IC 50 0.70 mg/mL), H 2 O 2 scavenging activity (IC 50 0.39 mg/mL), reducing ability (Abs 700 nm 1.46) and lipid peroxidation inhibitory ability (2.71 MDAEC/kg) (P <0.05) compared to its n-hexane, DCM fractions, crude MeOH extract and MeOH extracts/fractions of H. valentiae and J. rubens. DCM fraction of J. rubens showed significantly higher hydroxyl radical scavenging activity (IC 50 0.55 mg/mL) compared with H. musciformis and H. valentiae (P <0.05). This study indicated the potential use of red seaweeds, in particular, H. musciformis as candidate species to be used as food supplement for increasing the shelf-life of food industry, and candidates in combating carcinogenesis and inflammatory diseases.

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Section: Total Phenolic Content In Red Seaweed Extracts and Fractionssupporting

confidence: 80%

Antioxidant activities and phenolic contents of three red seaweeds (Division: Rhodophyta) harvested from the Gulf of Mannar of Peninsular India

2013

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“…Additionally, Abalone entrails feed seaweeds, which contained catechins. 28) This suggests that the catechins in these enzymes might be attribute to the diets of shellfishes. Therefore, the use of deconjugation enzymes derived from bacteria is suitable for the mesurement of polyphenols including catechins by highly sensitive methods such as LC-MS/MS.…”

Section: Discussionmentioning

confidence: 99%

Possible Evidence of Contamination by Catechins in Deconjugation Enzymes fromHelix pomatiaandAbalone entrails

Nakamura

Tanaka

Ashida

2011

Bioscience, Biotechnology, and Biochemistry

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“…Duan et al (2006) reported that antioxidant activity of red seaweed extracts correlated with their polyphenol content. Yoshie et al (2000) identifi ed the presence of catechins in marine algae. Fucoxanthin, isolated from the brown seaweed Wakame exhibited various radical scavenging activities (Sachindra et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Radical scavenging and singlet oxygen quenching activity of extracts from Indian seaweeds

et al. 2010

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Free radicals and singlet oxygen are responsible for oxidative stress related diseases and many natural compounds are known to have antioxidant properties. In this study, extracts from brown and red seaweeds of Indian origin were evaluated for their ability to scavenge different radicals and quench singlet oxygen. The crude extract in methanol and its fractions in different solvents were evaluated for their activity. The methanol extract and its fractions from brown seaweed exhibited higher 2,2′-azinobis(3-ethylbenzothizoline-6-sulfonic acid) radical scavenging activity with more than 90% scavenging in butanol and ethyl acetate fractions and correlated with polyphenol content. There was a signifi cant difference (p<0.001) in hydroxyl radical scavenging activity between different fractions of the same seaweed. Among the crude extracts, extract from Gracilaria corticata showed the highest (14.0%) activity. Crude extract from brown seaweeds showed higher peroxyl radical scavenging activity compared to red seaweeds. In fractions from brown seaweed extracts, highest activity was observed in ethyl acetate fraction (>88%) followed by hexane fraction (>40 %). Ethyl acetate fraction from crude extract showed higher inhibitory activity against hemoglobin induced linoleic acid oxidation. Singlet oxygen quenching activity of the crude extract from brown seaweed was lower (<13%) compared to red seaweeds (16.4-20.5%).

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Distribution of catechins in Japanese seaweeds

Cited by 90 publications

References 16 publications

Antioxidant activities and phenolic contents of three red seaweeds (Division: Rhodophyta) harvested from the Gulf of Mannar of Peninsular India

Antioxidant activities and phenolic contents of three red seaweeds (Division: Rhodophyta) harvested from the Gulf of Mannar of Peninsular India

Possible Evidence of Contamination by Catechins in Deconjugation Enzymes fromHelix pomatiaandAbalone entrails

Radical scavenging and singlet oxygen quenching activity of extracts from Indian seaweeds

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