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Abstract Title:

Prevention by long-term fermented miso of induction of colonic aberrant crypt foci by azoxymethane in F344 rats.

Abstract Source:

Biochem Biophys Res Commun. 2006 Feb 17;340(3):800-6. Epub 2005 Dec 20. PMID: 11748458

Abstract Author(s):

Masayuki Ohara, Huimei Lu, Katsutomo Shiraki, Yoshiyuki Ishimura, Toshihiro Uesaka, Osamu Katoh, Hiromitsu Watanabe

Abstract:

The present study was designed to investigate the effects of fermented miso in the diet on the induction of aberrant crypt foci (ACF) by azoxymethane (AOM) in male F344 rats. A total of 50 rats, 8 weeks of age, were divided into 5 groups and given weekly subcutaneous injections of AOM (15 mg/kg body wt) for 3 weeks. Rats were fed a normal control MF solid diet, or solid diet containing 10% long-term fermented (aged), medium- or short-term fermented miso, or 2.2% NaCl for 5 weeks, starting one week before the first AOM dosing. It was found that, compared to the control (MF) diet, the long-term fermented diet significantly decreased (by 22.2%) ACF/colon, but increased (by 18.2%) the number of aberrant crypts (Acs)/focus. The latter was also increased by the medium-term fermented diet (by 25.3%). The PCNA labeling index was only affected by the short-term fermented diet (36.9% increase) and by 2.2% NaCl diet (27.2% increased). The present results indicate that aged or completely fermented miso supplemented into the diet, could act as a chemopreventive agent for colon carcinogenesis.

Study Type : Animal Study

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Sayer Ji
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