engleski

“The effects of four-week intake of blackthorn flower extract on mice tissue antioxidant status and phenolic content”

The study examines the antioxidative physiological effects of phenolics from ethanol-water extract of blackthorn flowers orally administrated for 28 days in daily doses of 25 mg of total phenolics/kg body weight to C57/BL6 mice. Contents of phenolics in the intestine, liver, and kidney collected after 1, 7, 14, 21, and 28 days of extract administration were analyzed by UPLC-MS/MS method. In the same tissues the antioxidative properties were determined as ferric reducing antioxidant power (FRAP), ABTS•+ scavenging activity, content of reduced glutathione (GSH), and activity of superoxide dismutase (SOD) and catalase (CAT). The lipid peroxidation in tissues was also evaluated by thiobarbituric acid reactive substances (TBARS) assay. Exposed mice (compared to the control) had lower content of TBARS in all tissues mostly on third/fourth week of daily consumption. SOD activity and GSH content increased on the 28th day in tissues. CAT activity was higher only in the liver after a one week of consumption but remained unchanged in other organs throughout the experiment. Phenolic profiles were different in individual tissues. The most prominent increase in content compared to control were determined for 3-O-feruloylquinic acid, 4-O-p-coumaroylqiunic acid, kaempferol pentoside and quercetin rhamnoside in the intestine, for ferulic acid and quercetin 3-O- rutinoside in the liver and for quercetin 3-O- rutinoside, ferulic acid and 4-O-p- coumaroylquinic acid in the kidney. Screened phenolics with different distribution in tissues could be responsible for slight differences in recorded antioxidative effects.

pharmacokinetic ; flavan-3-ol ; flavonoids ; bioavailability ; phenolic compounds ; Prunus spinosa L.

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