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Short-chain fructo-oligosaccharides reduce the occurrence of colon tumors and develop gut-associated lymphoid tissue
1Institut National de la Santé et de la Recherche Médicale U 419, Human Nutrition Research Center of Nantes, Institut de Biologie, France.
Abstract:
C57BL/6J-Min/+ mice, which are heterozygous for a non-sense mutation in the Apc gene, provide a model for both familial adenomatous polyposis and sporadic colon cancers. In our study, gut tumors and small intestine lymphoid nodules were counted in Min mice fed fiber-enriched diets for 6 weeks. Neither starch-free wheat bran nor resistant starch modified the number of tumors. However, short-chain fructo-oligosaccharides dramatically reduced the incidence of colon tumors and concomitantly developed gut-associated lymphoid tissue. Our experiment shows that short-chain fructo-oligosaccharides counteract advanced stages of colon carcinogenesis, possibly via stimulation of antitumoral immunity by modulation of the colonic ecosystem.
Insights
Short-chain fructo-oligosaccharides significantly reduced colon tumor incidence in a mouse model of colon cancer. This dietary intervention also enhanced gut-associated lymphoid tissue, suggesting a role in boosting anti-tumor immunity.
Area of Science:
- Oncology
- Immunology
- Gastroenterology
Background:
- Familial adenomatous polyposis and sporadic colon cancers share genetic links.
- C57BL/6J-Min/+ mice model intestinal polyposis and colon carcinogenesis.
- Dietary fiber's role in colon cancer prevention is under investigation.
Purpose of the Study:
- To investigate the effect of fiber-enriched diets on tumor development in Min mice.
- To determine if specific dietary fibers, including short-chain fructo-oligosaccharides, impact colon carcinogenesis.
- To explore the relationship between diet, gut immunity, and colon tumor incidence.
Main Methods:
- Min mice were fed diets supplemented with starch-free wheat bran, resistant starch, or short-chain fructo-oligosaccharides for six weeks.
- Gut tumors and small intestine lymphoid nodules were quantified.
- Changes in gut-associated lymphoid tissue were assessed.
Main Results:
- Neither starch-free wheat bran nor resistant starch affected tumor numbers.
- Short-chain fructo-oligosaccharides significantly reduced colon tumor incidence.
- Concomitant development of gut-associated lymphoid tissue was observed with short-chain fructo-oligosaccharide consumption.
Conclusions:
- Short-chain fructo-oligosaccharides demonstrate potential in counteracting advanced colon carcinogenesis.
- Dietary modulation of the colonic ecosystem by short-chain fructo-oligosaccharides may stimulate anti-tumoral immunity.
- Further research into short-chain fructo-oligosaccharides for colon cancer prevention is warranted.