Antioxidant activities of different fractions of polysaccharide conjugates from green tea (Camellia Sinensis)

Chen, Hạixia; Zhang, Min; Qu, Zhishuang; Xie, Bijun

doi:10.1016/j.foodchem.2007.06.040

Cited by 297 publications

(153 citation statements)

References 12 publications

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“…The antioxidant activity of plant polysaccharides may be influenced by lots of factors, such as their structure, molecular weight, and chemical composition (Chen et al, 2008). For example, hydroxyl groups of monosaccharides in a polysaccharide are considered to be a significant factor in affecting free radical scavenging ability, due to their potential to donate hydrogen (Tian et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

In vitro antioxidant activity and potential inhibitory action against α-glucosidase of polysaccharides from fruit peel of tea (Camellia sinensis L.)

Wang

et al. 2014

J. Zhejiang Univ. Sci. B

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Abstract:The conditions for extracting polysaccharides from tea (Camellia sinensis L.) fruit peel (TFPPs) were studied. Three parameters (temperature, time, and liquid/solid ratio) affecting the extraction of TFPP were optimized using response surface methodology (RSM). Under the optimized conditions, the yield of TFPP was predicted to be 4.98%. The physicochemical properties, in vitro antioxidant activities, and inhibitory effects on α-glucosidase of fractionated TFPPs (TFPP-0, TFPP-20, TFPP-40, and TFPP-60) were investigated. We found that the TFPPs were all acid protein-bound heteropolysaccharides, although with different chemical compositions. They had not only remarkable scavenging activity on 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) and reducing activity, but also excellent inhibitory potential against α-glucosidase in vitro. Our results suggest that tea fruit peel could be treated as a potential bioresource for the development of polysaccharide antioxidants.

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Section: Resultsmentioning

confidence: 99%

In vitro antioxidant activity and potential inhibitory action against α-glucosidase of polysaccharides from fruit peel of tea (Camellia sinensis L.)

Wang

et al. 2014

J. Zhejiang Univ. Sci. B

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“…The model of scavenging the stable DPPH radical is a widely used method to evaluate the free radical scavenging ability of natural compounds (Chen et al 2008). The DPPH assay involves reaction of specific antioxidant with a stable free radical 2, 2-diphenyl-1-picrylhydrazyl (DPPH) wherein a reduction in the DPPH concentration caused by the antioxidant decreases the optical absorbance of DPPH (Annegowda et al 2011).…”

Section: Dpph Radical Scavenging Assaymentioning

confidence: 99%

Alkali extraction and in vitro antioxidant activity of Monascus mycelium polysaccharides

et al. 2012

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In the present work, alkali extraction technology was used to optimize the extraction of Monascus mycelium polysaccharides for the first time. The extracting parameters of alkali extracted Monascus mycelium polysaccharides were optimized by Box-Behnken design (BBD). The optimum conditions were extraction temperature 49°C, alkali concentration 7%, solvent/material ratio 23:1 (ml/g) and extraction time 2.3 h with an enhanced yield of 10.1%, compared with the yield 4.76% of hot water extraction, indicating that alkali extraction is a more efficient way. In order to discuss the biological activity of alkali extracted polysaccharides, we compared the in vitro antioxidant activity of alkali extracted polysaccharides (AMP) with hot water extracted polysaccharides (HMP). The result showed that AMP have the similar capability of scavenging both superoxide radical and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical of HMP in vitro. Therefore, alkali extraction technology is not only a highefficiency way to extract AMP, but also can retain the natural antioxidant activities of AMP, which can be used in pharmaceutical and food industries.

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“…Moreover, they are harmless and do not cause side effects (Warrand, 2006). In addition, these high molecular weight polymers may exhibit therapeutic properties eg anti-tumor, anti-inflammatory, and anti-microbial activities (Caili et al, 2007;Chen et al, 2008;Krichen et al, 2015;Leung et al, 2006;Mokni Ghribi et al, 2015). All of these activities and others are closely related to the physicochemical properties of each polysaccharide molecule such as the type of the sugar residues, the chemical composition, the molecular weight and the degree of branching.…”

Section: Introductionmentioning

confidence: 99%

Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: recovery, identification and evaluation of their antioxidant activities

Koubàa¹,

Ktata²,

Barba³

et al. 2015

International Agrophysics

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A b s t r a c t. Opuntia stricta Haw. is considered as one of the most common cactus plant growing in Tunisia. Extracting valuable compounds from its fruit peel, considered as by-product, is drawing more and more attention, making it on the verge of commercialization. Water-soluble polysaccharides were extracted from Opuntia stricta Haw. peels, and their chemical composition assessed using thin layer chromatography. The antioxidant activities of the extracted polysaccharides were assessed using 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity, total antioxidant activity and reducing power capacity. The extraction yield of water-soluble polysaccharides was 7.53±0.86%. The chemical composition revealed the presence of rhamnose, arabinose, glucose, mannose, galactose and galacturonic acid. The infra-red spectroscopic analysis showed a similar structure to that of Opuntia ficus-indica polysaccharide peels. Additionally, the extracted polysaccharides exhibited high antioxidant activities. In fact, the free radical scavenging activity (half inhibition concentration = 6.5 mg ml -1 with 94.9% inhibition at 50 mg ml -1

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Antioxidant activities of different fractions of polysaccharide conjugates from green tea (Camellia Sinensis)

Cited by 297 publications

References 12 publications

In vitro antioxidant activity and potential inhibitory action against α-glucosidase of polysaccharides from fruit peel of tea (Camellia sinensis L.)

In vitro antioxidant activity and potential inhibitory action against α-glucosidase of polysaccharides from fruit peel of tea (Camellia sinensis L.)

Alkali extraction and in vitro antioxidant activity of Monascus mycelium polysaccharides

Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: recovery, identification and evaluation of their antioxidant activities

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