| The ability of green tea to positively modulate key markers of gastrointestinal function in rats. | |
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MedLine Citation:
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PMID: 21031617 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The beneficial effects of selenium-containing green tea (Se-GTE, 1.44 mg selenium/kg dry leaves) and China green tea (CH-GTE, 0.13 mg selenium/kg leaves) on the population size of lactobacilli and bifidobacteria and the activity of two microbial enzymes in the caeca of rats have been investigated. Oral gavage of rats with Se-GTE extract for 6 days resulted in a significant increase in caecal counts of lactobacilli and bifidobacteria (p < 0.05) while significantly reducing the caecal counts of bacteroides and clostridial bacteria. In contrast, gavaging the rats with CH-GTE extract for 6 days resulted in a slight but not significant increase in the numbers of caecal lactobacilli and bifidobacteria but decreased significantly the numbers of bacteroides (p < 0.05) and clostridia (p < 0.05). In addition, rats gavaged with CH-GTE and Se-GTE showed a 17.2% and 21.3% reduction in the activity of the bacterial enzyme β-glucuronidase, respectively, when compared with the rats gavaged with water only. β-glucuronidase is considered to be one of the enzymes that increases the risk for colorectal cancer. Moreover, gavaging rats with these teas resulted in 19% and 25.5% increments in the activity of β-glucosidase, respectively. In conclusion, Se-GTE showed both bifidogenic and lactogenic effects and the high level of selenium may be behind the superiority of this tea over CH-GTE. |
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Authors:
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Abdul-Lateef Molan; Zhuojian Liu; Ruby Tiwari |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Phytotherapy research : PTR Volume: 24 ISSN: 1099-1573 ISO Abbreviation: Phytother Res Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-29 Completed Date: 2011-01-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8904486 Medline TA: Phytother Res Country: England |
Other Details:
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Languages: eng Pagination: 1614-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 John Wiley & Sons, Ltd. |
Affiliation:
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Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11 222, Palmerston North, New Zealand. A.L.Molan@massey.ac.nz |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Bacteroides / enzymology, isolation & purification Bifidobacterium / enzymology, isolation & purification Cecum / drug effects*, microbiology* Clostridium / enzymology, isolation & purification Glucuronidase / metabolism In Situ Hybridization, Fluorescence Lactobacillaceae / enzymology, isolation & purification Male Plant Extracts / pharmacology* Rats Rats, Sprague-Dawley Selenium / chemistry Tea / chemistry* beta-Glucosidase / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Plant Extracts; 0/Tea; 7782-49-2/Selenium; EC 3.2.1.21/beta-Glucosidase; EC 3.2.1.31/Glucuronidase |
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