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Chemical composition and antioxidant activities of different polysaccharides from the roots of Angelica dahurica.
Chem Biodivers ; 8(6): 1121-31, 2011 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-21674784
The total crude polysaccharides (CADPs), isolated from the roots of Angelica dahurica by H(2) O extraction, EtOH precipitation, and dialysis, and the four fractions ADP1, ADP2, ADP3, and ADP4, obtained by gel filtration of the CADPs, were analyzed to characterize their composition and evaluated for their antioxidant activity using different in vitro tests such as the malondialdehyde (MDA)-production, the ferrous ion (Fe(2+) )-chelating, and the HO(.) radical-scavenging assays. The predominant neutral monosaccharides in the four fractions were identified as arabinose, galactose, and glucose, while the composition and ratio of the monosaccharides were different between the fractions. The CADPs and its fractions were found to significantly inhibit lipid peroxidation, chelate Fe(2+) , and scavenge HO(.) radicals, indicating that these polysaccharides possessed antioxidant activity. Among the four fractions, ADP4 exhibited the strongest antioxidant activity, which was stronger than that of the control antioxidant vitamin E (Vit E). Taken together, the chemical composition of these polysaccharides might affect their antioxidant activity, and ADP4 could be explored as a source of potential novel natural antioxidants for food and pharmaceutical purposes.





Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Polissacarídeos / Depuradores de Radicais Livres / Angelica Idioma: Inglês Revista: Chem Biodivers Assunto da revista: Bioquímica / Química Ano de publicação: 2011 Tipo de documento: Artigo