Effects of dietary folate on intestinal tumorigenesis in the apcMin mouse. (Article, 2000) [WorldCat.org]
aller au contenu
Effects of dietary folate on intestinal tumorigenesis in the apcMin mouse.
FermerAperçu de cet ouvrage
Vérification...

Effects of dietary folate on intestinal tumorigenesis in the apcMin mouse.

Auteur : J Song Affiliation: Department of Medicine, University of Toronto, Ontario, Canada.; A Medline; JB Mason; S Gallinger; YI Kim
Édition/format: Article Article : Anglais
Source:Cancer research, 2000 Oct 01; 60(19): 5434-40
Résumé:
Dietary folate appears to be inversely related to colorectal cancer risk. This study investigated the effects of dietary intervention with folate or the development of intestinal polyps in Min (Apc +/-) mice. Weanling Mil mice were fed diets containing 0, 2 (basal requirement), 8, or 20 mg folate/kg diet. At 3 and 6 months of dietary intervention, 50% of the mice from each group were sacrificed, and the small  Lire la suite...
Évaluation:

(pas encore évalué) 0 avec des critiques - Soyez le premier.

Plus comme ceci
&AllPage.SpinnerRetrieving;

Trouver un exemplaire dans la bibliothèque

&AllPage.SpinnerRetrieving; Recherche de bibliothèques qui possèdent cet ouvrage...

Détails

Type de document: Article
Tous les auteurs / collaborateurs: J Song Affiliation: Department of Medicine, University of Toronto, Ontario, Canada.; A Medline; JB Mason; S Gallinger; YI Kim
ISSN:0008-5472
Note sur la langue: English
Identificateur Unique : 120930274
Récompenses:

Résumé:

Dietary folate appears to be inversely related to colorectal cancer risk. This study investigated the effects of dietary intervention with folate or the development of intestinal polyps in Min (Apc +/-) mice. Weanling Mil mice were fed diets containing 0, 2 (basal requirement), 8, or 20 mg folate/kg diet. At 3 and 6 months of dietary intervention, 50% of the mice from each group were sacrificed, and the small intestine and colon were analyzed for polyps and aberrant crypt foci (ACF). Serum folate concentrations accurately reflected dietary folate levels (P < 0.001). At 3 months no significant difference in the average number of total small intestinal polyps was observed among the four groups. However, increasing dietary folate levels significantly reduced the number of ileal, but not duodenal or jejunal, polyps in a dose-dependent manner (P-trend = 0.001); folate supplementation at 20 mg/kg diet was associated with a 68-78% reduction in the number of ileal polyps compared with the other three diets (P < 0.007). The number of ileal polyps was inversely correlated with serum folate concentrations (P = 0.03). At 3 months, increasing dietary folate levels significantly decreased the number of colonic ACF in a dose-dependent manner (P = 0.05); the control and two folate supplemented diets significantly reduced the number of colonic ACF by 75 100% compared with the folate-deficient diet (P < 0.04). The number of colonic ACF was inversely correlated with serum folate concentration (P = 0.05). No significant difference in the number of colonic adenoma was observed among the four groups at 3 months. At 6 months, no significant differences in the average number of total small intestinal, duodenal, and jejunal polyps, colonic adenomas, and colonic ACF wer observed among the four groups. However, the folate-deficient diet had 62-76% lower number of ileal polyps compared with the control and two folate-supplemented diets (P < 0.003). Serum folate concentrations, but not dietary folate levels, were directly correlated with the number of ilea polyps (P = 0.006). These data suggest that dietary folate supplementation suppresses the development of ileal polyps and colonic ACF in this model However, at later time points, folate supplementation appears to have an opposite effect on ileal polyps. These data generally support the role of folate in intestinal tumorigenesis suggested in epidemiological studies and chemical carcinogen animal models. Notwithstanding the limitations associated with this model, these data suggest that the optimal timing and dose of folate intervention need to be determined for safe and effective folate chemoprevention.

Critiques

Critiques d’utilisateurs
Récupération des critiques de GoodReads...
Récuperation des critiques DOGObooks…

Marqueurs

Tous les marqueurs des utilisateurs (1)

Voir les marqueurs les plus utilisés sous forme de: liste de marqueurs | nuage de marqueurs

  • mice  (Belarus 1 personne)
Confirmez cette demande

Vous avez peut-être déjà demandé cet ouvrage. Veuillez sélectionner OK si vous voulez poursuivre avec cette demande quand même.

Fermer la fenêtre

Veuillez vous connecter à WorldCat 

Vous n’avez pas de compte? Vous pouvez facilement créer un compte gratuit.