Wheat bran- but not oat bran-enriched diets increase the mucosal height of the cecum and colon of newly weaned and aged rats

[PeskyPeater]

"In spite of the reports mentioned above, it is not known whether the effect of a water-soluble fiber-enriched diet (the main source of SCFA) on the mucosa of the large bowel is more pronounced than that of an insoluble fiber-enriched diet. In the present study, we determined the effect of fiber-rich diets on the mucosal height of the colon and cecum. Rats received two types of fiber-rich diets presenting different soluble/insoluble ratios for 8 weeks, i.e., oat bran (0.3) and wheat bran (0.14). To better characterize the effect of the fiber-rich diets on the intestinal mucosa, the experiments were carried out on newly weaned (21 days old) and aged (12 months old) rats. "

"The effect of diets enriched with oat or wheat bran (prepared by the addition of 300 g of each fiber to 1000 g of the regular diet), given for 8 weeks, on the mucosal height of the colon and cecum was investigated. Newly weaned (21 days old) and aged (12 months old) male Wistar rats were used in this study. As compared to controls, diets enriched with wheat bran provoked a significant increase in the mucosal height, whereas oat bran did not cause any effect. In newly weaned rats (21 days old), wheat bran increased the mucosal height (µm) in the cecum by 20% (mean ± SEM for 8 rats; 169.1 ± 5.2 and 202.9 ± 8.0 for control and wheat bran, respectively) and in the colon (218.8 ± 7.2 and 264.5 ± 18.8 for control and wheat bran, respectively). A similar effect was observed in aged rats (12 months old), with an increase of 15% in the mucosal height (µm) of the cecum (mean ± SEM of 8 rats; 193.2 ± 8.6 and 223.7 ± 8.3 for control and wheat bran, respectively) and of 17% in the colon (300.4 ± 9.2 and 352.2 ± 15.9 for control and wheat bran, respectively). "

Physiology and biophysics • Braz J Med Biol Res 30 (8) • Aug 1997
Wheat bran- but not oat bran-enriched diets increase the mucosal height of the cecum and colon of newly weaned and aged rats

 

[GTW]

Soluble/insoluble hardly includes all differences between dietary fiber sources.

 

[PeskyPeater]

Soluble/insoluble hardly includes all differences between dietary fiber sources.

Take a look at this study, were they compare 22 dietary fibers.

Comparative Effect of 22 Dietary Sources of Fiber on Gut Microbiota of Healthy Humans in vitro

 

[supercoolguy]

Take a look at this study, were they compare 22 dietary fibers.

Comparative Effect of 22 Dietary Sources of Fiber on Gut Microbiota of Healthy Humans in vitro

 

[GTW]

Good on ya, Mate!
Comprehensive perspective although not fully conclusive.
> benefit of increased lactate production by whole grains, likely caused by bifidobacteria and lactobacilli boost, is the production of health-promoting metabolites. Butyrate is the main source of energy for colonocytes, and an impairment in butyrate production may play a role in intestinal inflammation (40, 41). On the other hand, a positive correlation was found between Bacteroidetes members and propionate, a key metabolite in energy metabolic homeostasis and gut–liver crosstalk (42).