Document Detail


Inhibitory effect of a water-soluble extract from the culture medium of Ganoderma lucidum (Rei-shi) mycelia on the development of pulmonary adenocarcinoma induced by N-nitrosobis (2-hydroxypropyl) amine in Wistar rats.
MedLine Citation:
PMID:  17089035     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A water-soluble extract from the culture medium of Ganoderma lucidum (Rei-shi) mycelia (MAK) has been shown to exert a potent chemopreventive effect. The present study was designed to investigate the effects of dietary MAK supplementation on the development of lung tumors initiated by N-nitrosobis (2-hydroxypropyl) amine (BHP) in male Slc:Wistar rats. A total of 77 animals, 6 weeks of age, were divided into 5 groups and given BHP (2,000 ppm) in their drinking water for 10 weeks. The normal controls were not supplied with BHP. After treatment with the carcinogen, the rats were fed a normal control MF solid diet, or the same diet containing MAK (1.25%, 2.5% or 5%) for 12 weeks. Macroscopically, all the doses of MAK reduced the number of nodules, and the effect of 5% MAK was found to be especially significant. Microscopically, an increase in the number of proliferating cell nuclear antigen (PCNA)-negative tumors and a decrease in the number of tumors strongly positive for PCNA were observed in the tissue sections from the rats that had received all the doses of MAK. The present results thus indicate that dietary supplementation with MAK inhibits the development of lung tumors, suggesting that MAK may be a potent chemopreventive agent against lung carcinogenesis.
Authors:
Naoki Kashimoto; Minoru Hayama; Kenji Kamiya; Hiromitsu Watanabe
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Oncology reports     Volume:  16     ISSN:  1021-335X     ISO Abbreviation:  Oncol. Rep.     Publication Date:  2006 Dec 
Date Detail:
Created Date:  2006-11-07     Completed Date:  2006-12-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422756     Medline TA:  Oncol Rep     Country:  Greece    
Other Details:
Languages:  eng     Pagination:  1181-7     Citation Subset:  IM    
Affiliation:
Department of Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adenocarcinoma / chemically induced,  prevention & control*
Animals
Carcinogens / toxicity
Culture Media / chemistry
Diet
Dose-Response Relationship, Drug
Drugs, Chinese Herbal / pharmacology*
Immunohistochemistry
Lung Neoplasms / chemically induced,  prevention & control*
Male
Mycelium / chemistry*
Nitrosamines / toxicity
Proliferating Cell Nuclear Antigen / biosynthesis,  drug effects
Rats
Rats, Wistar
Reishi / chemistry*
Chemical
Reg. No./Substance:
0/Carcinogens; 0/Culture Media; 0/Drugs, Chinese Herbal; 0/Nitrosamines; 0/Proliferating Cell Nuclear Antigen; 53609-64-6/diisopropanolnitrosamine

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