Effects of tannins and related polyphenols on methicillin-resistant Staphylococcus aureus

Hatano, Tsutomu; Kusuda, Miwako; Inada, Kazutoshi; Ogawa, Tomo Omi; Shiota, Sumiko; Tsuchiya, Tomofusa; Yoshida, Takashi

doi:10.1016/j.phytochem.2005.01.013

Cited by 136 publications

(87 citation statements)

References 20 publications

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“…However, the organization of information in table format allows for quick and straightforward referencing. Polymeric proanthocyanidins isolated from Zizyphus fruits and Zanthoxylum fruit peels may be useful as suppressors of antibiotic resistance in Staphylococcus aureus and show promise of use as an alternative treatment to antibiotic use against Staphylococcus aureus infection [191]. Howell et al [192] report that A-type cranberry and B-type grape proanthocyanidins elicit in vitro anti-adhesion activity of E. coli from uroepithelial cells.…”

Section: Flavan-3-ols As Antimicrobial Anti-viral Antiparasitic Andmentioning

confidence: 99%

Flavan‐3‐ols: Nature, occurrence and biological activity

Aron

Kennedy²

2008

Molecular Nutrition Food Res

647

491

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Representing the most common flavonoid consumed in the American diet, the flavan-3-ols and their polymeric condensation products, the proanthocyanidins, are regarded as functional ingredients in various beverages, whole and processed foods, herbal remedies and supplements. Their presence in food affects food quality parameters such as astringency, bitterness, sourness, sweetness, salivary viscosity, aroma, and color formation. The ability of flavan-3-ols to aid food functionality has also been established in terms of microbial stability, foamability, oxidative stability, and heat stability. While some foods only contain monomeric flavan-3-ols [(-)-epicatechin predominates] and dimeric proanthocyanidins, most foods contain oligomers of degree of polymerization values ranging from 1-10 or greater than 10. Flavan-3-ols have been reported to exhibit several health beneficial effects by acting as antioxidant, anticarcinogen, cardiopreventive, antimicrobial, anti-viral, and neuro-protective agents. This review summarizes the distribution and health effects of these compounds.

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Section: Flavan-3-ols As Antimicrobial Anti-viral Antiparasitic Andmentioning

confidence: 99%

Flavan‐3‐ols: Nature, occurrence and biological activity

Aron

Kennedy²

2008

Molecular Nutrition Food Res

647

491

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“…The gallotannins, one type of hydrolysable tannins, are the dominant components and account for 60-77% in G. chinensis [1], having many different biological and pharmacological properties such as anti-microbial [2,3], anti-oxidant [2], anticancer [4,5] and anti-cariogenic activities [6].…”

Section: Introductionmentioning

confidence: 99%

Preliminary extraction of tannins by 1‐butyl‐3‐methylimidazole bromide and its subsequent removal from Galla chinensis extract using macroporous resins

Luo

Li-liang

et al. 2013

J of Separation Science

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In recent years, ionic liquids have become increasingly attractive as 'green solvents' used in the extraction of bioactive compounds from natural plant. However, the separation of ionic liquid from the target compounds was difficult, due to their low vapour pressure and high stabilities. In our study, ionic liquid-based ultrasonic and microwave-assisted extraction was used to obtain the crude tannins, then the macroporous resin adsorption technology was further employed to purify the tannins and remove the ionic liquid from crude extract. The results showed that XDA-6 had higher separation efficiency than other tested resins, and the equilibrium experimental data were well fitted to Langmuir isotherms. Dynamic adsorption and desorption were performed on XDA-6 packed in glass columns to optimise the separation process. The optimum conditions as follows: the ratio of column height to diameter bed was 1:8, flow rate 1 BV/h (bed volume per hour), 85% ethanol was used as eluant while the elution volume was 2 BV. Under the optimised conditions, the adsorption and desoption rate of tannins in XDA-6 were 94.81 and 91.63%, respectively. The content of tannins was increased from 70.24% in Galla chinensis extract to 85.12% with a recovery of 99.06%. The result of ultra-performance liquid chromatography (UPLC)-MS/MS analysis showed that [bmim]Br could be removed from extract.

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“…However, little is known about its antimicrobial effects on MRSA. The aloe-emodin was reported, with different EM structure (Hatano et al, 2005). The screening of Rheum palmatum roots for antibacterial activity, showed EM to have antibacterial activity against MRSA.…”

Section: Introductionmentioning

confidence: 99%