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Carcinogenesis, Vol. 20, No. 10, 1953-1956, October 1999
© 1999 Oxford University Press

Molecular Epidemiology and Cancer Prevention

T cell status influences colon tumor occurrence in Min mice fed short chain fructo-oligosaccharides as a diet supplement

Fabrice Pierre, Pascale Perrin, Euphémie Bassonga, Francis Bornet1, Khaled Meflah and Jean Menanteau2

Institut National de la Santé et de la Recherche Médicale U419, Human Nutrition Research Center of Nantes, Institut de Biologie, 9 Quai Moncousu, F-44035 Nantes Cedex 01, France and
1 Eridania Béghin-Say, Vilvoorde Research and Development Centre, Nutrition and Health Service, Havenstraat 84, B-1800 Vilvoorde, Belgium

We have previously shown that addition of short chain fructo-oligosaccharides (indigestible carbohydrates) to food prevented colon tumors in C57BL/6-ApcMin/+ mice, a model for human colon cancer. As gut-associated lymphoid tissue was concomitantly developed, we suggested that the immune response generated by this food may interfere with carcinogenesis due to involvement of mucosal cells in the regulation of tissue homeostasis. In the present experiment, we tested whether T cell status may influence colon tumor formation in Min mice fed a food supplement of short chain fructo-oligosaccharides. Min mice depleted of CD4+ and CD8+ lymphocytes developed twice as many tumors as immunocompetent mice (0.8 as compared with 0.4, the mean number in 7-week-old Min mice when food supplementation began; P = 0.02). It is concluded that food supplementation with a substrate (a known prebiotic) fermented in the colon may stimulate a mechanism of immunosurveillance that would otherwise remain inefficient.

Abbreviations: IEL, intraepithelial lymphocytes; PBS, phosphate-buffered saline; sc-FOSs, short chain fructo-oligosaccharides.

2 To whom correspondence should be addressed. Email: menanteau{at}nantes.inserm.fr


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