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Studies have shown fibers to be effective in reducing the appearance of aberrant crypt foci (ACF) in rodents. Objective: The goal of this study was to investigate the preventive effects of fructooligosaccharide (FOS) and inulin prebiotics on the appearance of ACF in mice. Materials and Methods: The techniques used were: RT-PCR to evaluate the gene expression of p16, p21, p54, cyclin D1 and cyclin E in the distal colon; the quantification of Number of aberrant crypt foci (ACF) and measurement of catalase activity in the liver and distal colon. The animals were divided into five treatments (n=8); C-: AIN93M diet without fibers + DMH (1,2-dimethylhydrazine); INL: AIN93M diet with inulin; INLCA: AIN93M diet with inulin + DMH; FOS: AIN93M diet with FOS; FOSCA: AIN93M diet with FOS + DMH, during 15 weeks. Results: Inulin prevented the appearance of ACF in the proximal, middle and distal colon, compared to the control without fibers. In the middle and distal colon, FOS was also effective in preventing the incidence of ACF. This effectiveness may be attributed to the increased gene expression of p16 following FOS treatment. Both prebiotics also decreased catalase activity in the distal colon, thus suggesting an antioxidant effect. Conclusion: These results suggesting an antioxidant effect prebiotics that may be attributed to the increased gene expression of p16.
Palabras Clave: aberrant crypt, Prebiotics, prevention colon, p16 protein
Mª José Sendrós Madroño
Pilar Bueno Vargas , Manuel Manzano Martín , Inmaculada López-aliaga , José M.ª López Pedrosa
María Dolores Ballesteros Pomar , Elena González Arnaiz
Ana Isabel Jiménez-Ortega , Rosa María Martínez García , Marta Velasco Rodríguez-Belvis , Ana Belén Martínez Zazo , María Dolores Salas-González , Esther Cuadrado-Soto
Francisco Guarner
Julián Herrera Mejía , Arnulfo Ramos-Jiménez , Florinda Jiménez Vega , Rocío Campos Vega , Aaron F. González Córdova , Abraham Wall-Medrano
Secundino Cigarrán Guldrís
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