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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
During the screening of compounds that potentiate the effect of antimicrobial agents against methicillin‐resistant Staphylococcus aureus (MRSA), we found that an extract of thyme (Thymus vulgaris L)Expand
Enhancement of antibacterial effects of epigallocatechin gallate, using ascorbic acid.
Although plant polyphenols such as (-)-epigallocatechin gallate (EGCG) have antibacterial activity towards methicillin-resistant Staphylococcus aureus (MRSA), such polyphenols are unstable inExpand
Antitumor Activity of Oenothein B, a Unique Macrocyclic Ellagitannin
The antitumor effect of oenothein B, a macrocyclic ellagitannin from Oenothera erythrosepala Bordas, on rodent tumors was studied, Oenothein B exhibited a strong antitumor activity against MM2Expand
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
Walnut polyphenols prevent liver damage induced by carbon tetrachloride and d-galactosamine: hepatoprotective hydrolyzable tannins in the kernel pellicles of walnut.
The polyphenol-rich fraction (WP, 45% polyphenol) prepared from the kernel pellicles of walnuts was assessed for its hepatoprotective effect in mice. A single oral administration of WP (200 mg/kg)Expand
Effects of tannins and related polyphenols on methicillin-resistant Staphylococcus aureus.
Methicillin-resistant Staphylococcus aureus (MRSA) often acquires multi-drug resistance and is involved in many cases of disease in hospitals. We investigated natural substances directly effectiveExpand
Polyphenolic compounds isolated from the leaves of Myrtus communis
Four hydrolyzable tannins [oenothein B (1), eugeniflorin D2 (2), and tellimagrandins I (3) and II (4)], two related polyphenolic compounds [gallic acid (5) and quinic acid 3,5-di-O-gallate (6)], andExpand
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 (Pelargonium sidoides, Phyllanthus amarus) and representatives of simple phenols (shikimic acid 3- and 5-O-gallate), flavan-3-ols (epigallocatechin 3-gallate),Expand
Ellagitannins renewed the concept of tannins
1.1 Old and New Concepts of Tannins The pharmacological activities of tannins described in medicinal books before the recent achievements on ellagitannin chemistry were mostly those of gallotanninsExpand