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Effects of the Interaction of Tannins with Co-existing Substances. VI. : Effects of Tannins and Related Polyphenols on Superoxide Anion Radical, and on 1, 1-Diphenyl-2-picrylhydrazyl Radical
The scavenging effects of twenty-five tannins including low-molecular polyphenols on the superoxide anion radical (O2-) generated in the hypoxanthine-xanthine oxidase system were estimated byExpand
Remarkable Synergies between Baicalein and Tetracycline, and Baicalein and β‐Lactams against Methicillin‐Resistant Staphylococcus aureus
Baicalein showed synergy with tetracycline in a MRSA strain that doesn't possess tetK, or with β‐lactams, and mechanisms of the synergies seem to be versatile. Expand
Antimicrobial activity of oleanolic acid from Salvia officinalis and related compounds on vancomycin-resistant enterococci (VRE).
An extract from Salvia officinalis (Sage) leaves showed antimicrobial activity against vancomycin-resistant enterococci (VRE). We isolated the effective compound and identified it as oleanolic acid,Expand
Enhancement of antibacterial effects of epigallocatechin gallate, using ascorbic acid.
The effect of EGCG on the antibiotic resistance of MRSA was also enhanced in the presence of ascorbic acid and the addition of an antioxidant may affect other pharmacological effects of polyphenols in analogous ways, although this does not mean the clinical usefulness of the addition directly. Expand
Antitumor Activity of Oenothein B, a Unique Macrocyclic Ellagitannin
Results suggest that oenothein B exerts its antitumor effect through potentiation of the host‐immune defense via activation of macrophages. Expand
Walnut polyphenols prevent liver damage induced by carbon tetrachloride and d-galactosamine: hepatoprotective hydrolyzable tannins in the kernel pellicles of walnut.
Telliamgrandin I especially completely suppressed both CCl 4- and d-GalN-induced cell damage, and thus is likely the principal constituent for the hepatoprotective effect of WP. Expand
Production of bioactive triterpenes by Eriobotrya japonica calli.
All of the triterpenes isolated from the callus tissues showed an inhibitory effect comparable to (-)-epigallocatechin gallate of green tea on the activation of Epstein-Barr virus early antigen (EBV-EA) induced by 12-O-tetradecanoylphorbol-13-acetate (TPA). Expand
Marker Constituents of the Natural Antioxidant Eucalyptus Leaf Extract for the Evaluation of Food Additives
Considering the evaluation of antioxidant activity by radical scavenging ability, a standardization of eucalyptus leaf extract, including the antioxidative polyphenol, oenothein B, is proposed. Expand
Tannins and related compounds induce nitric oxide synthase and cytokines gene expressions in Leishmania major-infected macrophage-like RAW 264.7 cells.
Some polyphenol-containing extracts and representatives of simple phenols, proanthocyanidins, and hydrolysable tannins were studied for gene expressions and were capable of enhancing the iNOS and cytokine mRNA levels in parasitised cells when compared with those in non-infected conditions. Expand
Effect of tannins from Quercus suber and Quercus coccifera leaves on ethanol-induced gastric lesions in mice.
The results suggest that the gastroprotective effects of extracts of Q. suber and Q. coccifera leaves and the purified tannins in this experimental model are related to their anti-lipoperoxidant properties. Expand