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Suppression of Helicobacter pylori-induced gastritis by green tea extract in Mongolian gerbils.

Abstract：

:Since urease of Helicobacter pylori is essential for its colonization, we focused attention on foodstuffs which inhibit the activity of this enzyme. Among plant-derived 77 foodstuff samples tested, some tea and rosemary extracts were found to clearly inhibit H. pylori urease in vitro. In particular, green tea extract (GTE) showed the strongest inhibition of H. pylori urease, with an IC(50) value of 13 microg/ml. Active principles were identified to be catechins, the hydroxyl group of 5(')-position appearing important for urease inhibition. Furthermore, when H. pylori-inoculated Mongolian gerbils were given GTE in drinking water at the concentrations of 500, 1000, and 2000 ppm for 6 weeks, gastritis and the prevalence of H. pylori-infected animals were suppressed in a dose-dependent manner. Since the acquisition by H. pylori of resistance to antibiotics has become a serious problem, tea and tea catechins may be very safe resources to control H. pylori-associated gastroduodenal diseases.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Matsubara S,Shibata H,Ishikawa F,Yokokura T,Takahashi M,Sugimura T,Wakabayashi K

doi

10.1016/j.bbrc.2003.09.066

subject

Has Abstract

pub_date

2003-10-24 00:00:00

pages

715-9

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006291X03018515

journal_volume

310

pub_type

杂志文章

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