Electrochemical and spectrometric study of antioxidant activity of pomiferin, isopomiferin, osajin and catalposide
Language English Country England, Great Britain Media print-electronic
Document type Comparative Study, Journal Article, Research Support, Non-U.S. Gov't
PubMed
18597965
DOI
10.1016/j.jpba.2008.05.025
PII: S0731-7085(08)00304-X
Knihovny.cz E-resources
- MeSH
- Antioxidants analysis chemistry pharmacology MeSH
- Benzopyrans * MeSH
- Electrochemistry MeSH
- Glucosides * MeSH
- Isoflavones analysis chemistry pharmacology MeSH
- Hydrogen-Ion Concentration MeSH
- Molecular Structure MeSH
- Oxidation-Reduction drug effects MeSH
- Spectrophotometry methods MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Comparative Study MeSH
- Names of Substances
- Antioxidants MeSH
- Benzopyrans * MeSH
- catalposide MeSH Browser
- Glucosides * MeSH
- Isoflavones MeSH
- isopomiferin MeSH Browser
- osajin MeSH Browser
- pomiferin MeSH Browser
The antioxidant properties of pomiferin, isopomiferin, osajin and catalposide are evaluated. The electrochemical behaviour of these compounds at a carbon paste electrode was studied using square wave voltammetry. Oxidative signals, optimized frequencies and appropriate pH acetate buffer conditions were determined. The detection limits (3S/N) for pomiferin, isopomiferin, osajin and catalposide were estimated to be 50 pg/ml, 800 pg/ml, 40 pg/ml and 10 ng/ml, respectively. Furthermore, spectrometric test was employed with 2,2-diphenyl-1-picrylhydrazyle (DPPH) to evaluate the antioxidant activities of these compounds. Based on the obtained results, the highest antioxidant activity measured by DPPH tests was found at pomiferin followed by isopomiferin. The activities of osajin and catalposide were undetectable. The protective effects of pomiferin, isopomiferin, osajin and catalposide on DNA exposed to oxygen radicals in vitro were also studied. Changes in height of oxidative signals for the four bases (guanine, thymine, adenine and cytosine) were measured for DNA exposed to oxygen radicals, generated by Fenton's reaction, non-oxidized ssDNA (50 microg/ml) displayed well developed signals; however, after oxidative damage the observed oxidative signals decreased. Significant protective effects were observed for pomiferin and osajin. Decreased effect was observed for isopomiferin while a further reduced protective effect was seen for DNA exposed to catalposide. Based on the obtained results, pomiferin had the highest antioxidant activity followed by isopomiferin, osajin and catalposide.
References provided by Crossref.org
Content of phenolic compounds and antioxidant capacity in fruits of apricot genotypes
