Evaluation of Nutritional Availability and Anti-Tumor Activity of Selenium Contained in Selenium-EnrichedKaiwareRadish Sprouts
| Autor: | Toshihide Okada, Toshimasa Nishiyama, Munehiro Yoshida, Yûichi Namikawa, Yoshimi Matsuzaki, Kenji Fukunaga |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Male
chemistry.chemical_element Weanling Nutritional Availability Biology Applied Microbiology and Biotechnology Biochemistry Raphanus Analytical Chemistry Mice Selenium Basal (phylogenetics) Neoplasms Slope ratio Animals Food science Molecular Biology chemistry.chemical_classification Antitumor activity Glutathione Peroxidase Glutathione peroxidase Organic Chemistry General Medicine Rats chemistry Nutritive Value Biotechnology Aberrant crypt foci |
| Zdroj: | Bioscience, Biotechnology, and Biochemistry. 71:2198-2205 |
| ISSN: | 1347-6947 0916-8451 |
| DOI: | 10.1271/bbb.70158 |
| Popis: | We estimated the nutritional availability of selenium (Se) in Se-enriched Kaiware radish sprouts (SeRS) by the tissue Se deposition and glutathione peroxidase (GPX) activity of rats administered the sprouts, and examined the effect of SeRS on the formation of aberrant crypt foci (ACF) in the colon of mice administered 1,2-dimethylhydrazine (DMH) to evaluate anti-tumor activity. Male weanling Wistar rats were divided into seven groups and fed a Se-deficient basal diet or the basal diet supplemented with 0.05, 0.10, or 0.15 microg/g of Se as sodium selenite or SeRS for 28 d. Supplementation with Se dose-dependently increased serum and liver Se concentrations and GPX activities, and the selenite-supplemented groups showed a higher increase than the SeRS-supplemented groups. The nutritional availability of Se in SeRS was estimated to be 33 or 64% by slope ratio analysis. Male 4-week-old A/J mice were divided into seven groups and fed a low Se basal diet or the basal diet supplemented with selenite, SeRS, or selenite + non-Se-enriched radish sprouts (NonSeRS) at a level of 0.1 or 2.0 microg Se/g for 9 weeks. After 1 week of feeding, all mice were given six subcutaneous injections of DMH (20 mg/kg) at 1-week intervals. The average number of ACF formed in the colon of mice fed the basal diet was 4.3. At a supplementation level of 0.1 mug Se/g, only SeRS significantly inhibited ACF formation. At a supplementation level of 2.0 microg Se/g, both selenite and SeRS significantly inhibited ACF formation. The addition of NonSeRS to the selenite-supplemented diets tended to inhibit ACF formation, but this was not statistically significant. These results indicate that SeRS shows lower nutritional availability but higher anti-tumor activity than selenite. |
| Databáze: | OpenAIRE |
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