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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ziliotto, L. Barbisan, L. F. Rodrigues, M. A. M. |
| Description | Country affiliation: Brazil Author Affiliation: Ziliotto L ( Department of Pathology, Botucatu Medical School, UNESP Sao Paulo State University, Botucatu, SP, Brazil.) |
| Abstract | The mushroom Agaricus blazei (Ab) has been widely used in folk medicine to treat various diseases including cancer. No information is available on its possible protective effects on the development of colon cancer. The potential blocking effect of Ab intake on the initiation stage of colon carcinogenesis was investigated in a short-term (4-week) bioassay using aberrant crypt foci (ACF) as biomarker. Male Wistar rats were given four subcutaneous injections of the carcinogen 1,2-dimethylhydrazine (DMH, 40 mg/kg bw, twice a week), during 2 weeks to induce ACF. The diet containing Ab at 5% was given 2 weeks before and during carcinogen treatment to investigate the potential beneficial effects of this edible mushroom on DMH-induced ACF. All groups were killed at the end of the fourth week. The colons were analyzed for ACF formation in 1% methylene blue whole-mount preparations and for cell proliferation in histological sections immunohistochemically stained for the proliferating cell nuclear antigen (PCNA). All DMH-treated rats developed ACF mainly in the middle and distal colon. Agaricus blazei intake at 5% did not alter the number of ACF induced by DMH or the PCNA indices in the colonic mucosa. Thus, the results of the present study did not confirm a chemopreventive activity of Ab on the initiation stage of rat colon carcinogenesis. |
| File Format | HTM / HTML |
| ISSN | 09603271 |
| Issue Number | 6 |
| Volume Number | 27 |
| e-ISSN | 14770903 |
| Journal | Human & Experimental Toxicology |
| Language | English |
| Publisher | Sage Publication |
| Publisher Date | 2008-06-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Subscribed |
| Subject Keyword | Discipline Toxicology Agaricus Chemistry Anticarcinogenic Agents Administration & Dosage Colonic Neoplasms Prevention & Control Plant Extracts Precancerous Conditions 1,2-dimethylhydrazine Toxicity Animal Feed Animals Tumor Markers, Biological Analysis Carcinogens Cell Proliferation Drug Effects Chemoprevention Colon Pathology Chemically Induced Drug Screening Assays, Antitumor Intestinal Mucosa Male Proliferating Cell Nuclear Antigen Rats Rats, Wistar Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Medicine Toxicology |
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