Antioxidative Activity of 3-O-Octanoyl-(+)-Catechin, a Newly Synthesized Catechin, in Vitro

Abstract

The antioxidative activities of 3-O-octanoyl-(+)-catechin were studied in vitro. Free radical scavenging activities were tested by spectrophotometrically measuring 2,2′-azinobis(3-ethylbenzothiazoline-6-sulphonate) (ABTS) radical cations, as well as by measuring luminol chemiluminescence induced by peroxyl radicals generated from 2,2′-azinobis(2-amidinopropane) dihydrochloride (

Interactions between Carnosine and Captopril on Free Radical Scavenging Activity and Angiotensin-converting Enzyme Activity in vitro

“…13) Shortly, two ml of ABTS solution, whose absorbance was 0.70 at 734 nm, were mixed with 20 ml of a test compound solution in a cuvette. At 4 min after mixing, the absorbance was measured at 734 nm.…”

Copper(II) Ions Convert Catechins from Antioxidants to Prooxidants in Protein Carbonyl Formation

“…7) The difference in the affinity of catechins for target molecules is supposed to contribute to the diversity in antioxidative capacity. In the present study, we first compared the antioxidative capacity of 3-O-acyl derivatives of (+)-catechin with (+)-catechin in protein oxidation induced by a radical generator, and then examined the interaction between catechins and Cu(II) ions in oxidative protein damage.…”

“…Assay for ABTS Radical Cation Scavenging Activity --Free radical scavenging activity of (+)-catechin and 3-O-acyl-(+)-catechins was determined by the method in a previous report. 7) The absorbance of ABTS radical cations at 734 nm was measured 7 min after mixing 2 ml of the solution of ABTS radical cations with 20 µl of a test compound solution in a cuvette. Catechins were dissolved in ethanol, and the catechin solution was replaced with vehicle in a control experiment.…”

Alkaloid and Phenolic Compounds of Rafflesia hasseltii Suringar and its host Tetrastigma leucostaphylum (Dennst.) Alston ex Mabb. in Bukit Tigapuluh National Park, Riau: A Preliminary Study

“…It is also well-known as tea extract, that have been recognized as health-promoting factors due to its antimutagenic, antioxidative and antibacterial activity (Nakagawa et al 2005). Modun et al (2003) and Suzuki et al (2007) had proved that this compound may support human health.…”