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Freeze-Dried Ham Promotes Azoxymethane-Induced Mucin-Depleted Foci and Aberrant Crypt Foci in Rat Colon

Pierre, Fabrice and Santarelli, Raphaëlle L. and Charton, Michael and Allam, Ossama and Taché, Sylviane and Naud, Nathalie and Guéraud, Françoise and Corpet , Denis E. Freeze-Dried Ham Promotes Azoxymethane-Induced Mucin-Depleted Foci and Aberrant Crypt Foci in Rat Colon. (2010) Nutrition and Cancer, vol. 62 (n° 5). pp. 567-573. ISSN 0163-5581

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Official URL: http://dx.doi.org/10.1080/01635580903532408

Abstract

Processed and red meat consumption is associated with the risk of colorectal cancer. Meta-analyses have suggested that the risk associated with processed meat is higher. Most processed meats are cured and cooked, which leads to formation of free nitrosyl heme. We speculated that free nitrosyl heme is more toxic than native myoglobin. The promoting effect of a freeze-dried, cooked, cured ham diet was looked for in a 100-day study. Colon carcinogenesis endpoints were aberrant crypt foci and mucin depleted foci (MDF). A second study (14 days) was designed 1) to compare the effect of ham, hemoglobin, and hemin; and 2) to test the effect of sodium chloride, nitrite, and phosphate in diet on early biomarkers associated with heme-induced promotion. In the 100-day study, control and ham-fed rats had 3.5 and 8.5 MDF/colon, respectively (P < 0.0001). Promotion was associated with cytotoxicity and lipid peroxidation. In the short-term study, cytotoxicity and lipid peroxidation of fecal water, and the urinary marker of lipid peroxidation, increased dramatically in ham- and hemin-fed rat. In contrast, the hemoglobin diet, sodium chloride, nitrite, phosphate diet had no effect. Freeze-dried cooked ham can promote colon carcinogenesis in a rodent model. Hemin, but not hemoglobin, mimicked ham effect on early biochemical markers associated with carcinogenesis.

Item Type:Article
Additional Information:Thanks to Taylor & Francis editor. The definitive version is available at http://www.informaworld.com/smpp/title~content=t775653687
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Institut National de la Recherche Agronomique - INRA
Université de Toulouse > Ecole Nationale Vétérinaire de Toulouse - ENVT
Laboratory name:
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Deposited By: Denis CORPET
Deposited On:30 Jul 2010 09:58

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