Identification of polysaccharides from pericarp tissues of litchi (Litchi chinensis Sonn.) fruit in relation to their antioxidant activities

Yang, Bao; Wang, Jinshui; Zhao, Mouming; Liu, Yang; Wang, Wei; Jiang, Yueming

doi:10.1016/j.carres.2006.01.004

Cited by 173 publications

(103 citation statements)

References 23 publications

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“…Determination of antioxidant activity by DPPH free radical scavenging assay The 2, 2-diphenyl-1-picrylhydrazyl free radical-scavenging activity was determined by standard methods with slight modification 28,29 . Various concentrations (100, 80, 60, 40, 20, 10, and 5 µg/mL) of the solvent fractions of V. cinerea were prepared in methanol.…”

Section: Determination Of Total Phenolic and Flavonoid Contentmentioning

confidence: 99%

Antioxidant and antimicrobial activities of solvent fractions of Vernonia cinerea (L.) Less leaf extract

Sonibare¹,

Aremu²,

Okorie³

2016

Afr H. Sci.

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Background: Vernonia cinerea (L.) Less is used in folk medicine as a remedy for various diseases. Objectives: The present study reports antioxidant and antimicrobial activities of solvent fractions of Vernonia cinerea. Methods: The antioxidant properties of solvent fractions of V. cinerea were evaluated by determining radicals scavenging activity, total flavonoid and phenolic contents measured with the 2,2-diphenyl-1-picryl hydrazyl (DPPH) test, the aluminum chloride and the Folin-ciocalteau methods, respectively. Antimicrobial activities were tested against human pathogenic microorganisms using agar diffusion method. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of each active extract were determined. Results: The ethyl acetate fraction having the IC 50 value of 6.50 µg/mL demonstrated comparable DPPH radical-scavenging activity with standard antioxidants, gallic acid and quercetin included in the study. All fractions displayed moderate antimicrobial potential against the tested pathogens with the zone of inhibition that ranged from 9.0 to 13.5 mm. The MIC (1.56 mg/mL) and MBC (3.13 mg/mL) indicated highest susceptibility of Candida albicans in all fractions. Conclusion:The results of this study showed that the solvent fractions of V. cinerea possess antioxidant and antimicrobial activities, hence justifying the folkloric use of the plant for the treatment of various ailments in traditional medicine.

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Section: Determination Of Total Phenolic and Flavonoid Contentmentioning

confidence: 99%

Antioxidant and antimicrobial activities of solvent fractions of Vernonia cinerea (L.) Less leaf extract

Sonibare¹,

Aremu²,

Okorie³

2016

Afr H. Sci.

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“…the dpph scavenging activity was measured according to nakajima et al (13) and yang et al (14). Volumes of 80 µl of 0.5 mm DPPH in meOh solutions and 80 µl of 0.1 m mES buffer in 50% meOh (ph 6.0) were added to a 96-well plate, and an aliquot of sample solution was added for a total volume of 200 µl.…”

Section: Methodsmentioning

confidence: 99%

Antioxidant and antitumor activities of water extracts from the root of Actinidia kolomikta

Guan

Zhang

Yang

et al. 2010

Experimental and Therapeutic Medicine

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Abstract. the genus of Actinidia is widely distributed throughout the Asian continent. Specific Actinidia species have been used as health foods and medical products for cancer treatment. Actinidia kolomikta is a species of wild plant that grows in the northern part of indochina. however, few studies on its bioactivity have been reported. in this study, the polysaccharide and polyphenol contents, the SOd-like activity and the dpph radical-scavenging activity of water extracts from the root of Actinidia kolomikta produced under different extraction temperatures were investigated. Furthermore, the water extraction-ethanol precipitate (WE-Ep) fraction and the water extraction-ethanol supernatant (WE-ES) fraction were used to test the anti-proliferative action on dld-1 colon cancer cells. Extracts produced using the 100˚C extraction procedure revealed higher extraction yields and antioxidant activities than extracts produced using the 40˚C extraction procedure. the WE-Ep and WE-ES fractions exhibited anti-proliferative effects on the dld-1 cells. moreover, the WE-ES polyphenolenriched fraction possessed more potent anti-proliferative effects on the dld-1 cells by inducing apoptosis compared to the WE-Ep polysaccharide fraction. medicinal plant extracts are generally considered to be relatively non-toxic at low doses and are not thought to cause major side effects compared to those observed with drugs. Wild A. kolomikta may provide an alternative to currently employed cancer therapies, and may be used as a natural health food with antioxidant actions.

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“…Published data indicate that plant polysaccharides in general have antioxidant activities and can be explored as novel potential antioxidants (Ng et al, 2004;Jiang et al, 2005;Wang et al, 2007). Different polysaccharide fractions extracted and purified from litchi fruit pericarp tissues exhibited strong antioxidant activities (Yang et al, 2006). Tea polysaccharides were also shown to exert significant inhibitory effects on hydroxyl and superoxide radicals and lipid peroxidation.…”

Section: Algal and Fungal Polysaccharidesmentioning

confidence: 99%

Dietary Antioxidants: From Micronutrients and Phytochemicals to Enzymes - Preventive Effects on Early Atherosclerosis and Obesity

Gaillet¹,

La²,

Rouanet³

2012

Oxidative Stress - Environmental Induction and Dietary Antioxidants

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Identification of polysaccharides from pericarp tissues of litchi (Litchi chinensis Sonn.) fruit in relation to their antioxidant activities

Cited by 173 publications

References 23 publications

Antioxidant and antimicrobial activities of solvent fractions of Vernonia cinerea (L.) Less leaf extract

Antioxidant and antimicrobial activities of solvent fractions of Vernonia cinerea (L.) Less leaf extract

Antioxidant and antitumor activities of water extracts from the root of Actinidia kolomikta

Dietary Antioxidants: From Micronutrients and Phytochemicals to Enzymes - Preventive Effects on Early Atherosclerosis and Obesity

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