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. 2012 Oct 25;9:93. doi: 10.1186/1743-7075-9-93

Table 4.

Large intestinal tissue weights and fermentation parameters of obesity-prone and obesity-resistant rats consuming diets with different levels of resistant starch for 4 wk1

 
 Resistant starch, % of diet weight
 Main Effects (P-value)
  0% 4% 8% 12% 16% RS Phenotype RS x Phenotype
Caecum
  
  
  
  
  
  
  
  
 Digesta weight, g
  
  
  
  
  
  
  
 0.015
 Obesity-prone
 1.7 ± 0.2 a
 2.3 ± 0.3 a
 6.4 ± 1.0 b
 6.9 ± 1.0 b
 11.5 ± 1.6 c
  
  
  
 Obesity-resistant
 1.5 ± 0.1 a
 2.5 ± 0.5 ab
 6.0 ± 0.7 b
 9.5 ± 0.9 c
 7.4 ± 1.3 bc
  
  
  
 Total SCFA pool, mmol
 169 ± 11 a
 288 ± 43 ab
 657 ± 83 bc
 985 ± 150 c
 1029 ± 150 c
 0.0001
 ns
 ns
 Digesta pH
 7.2 ± 0.1 c
 6.8 ± 0.1 b
 6.2 ± 0.1 a
 6.0 ± 0.1 a
 5.9 ± 0.1 a
 0.0001
 ns
 ns
Colon
  
  
  
  
  
  
  
  
 Digesta weight, g
 1.0 ± 0.1 a
 1.9 ± 0.1 b
 2.1 ± 0.2 bc
 3.0 ± 0.2 d
 3.2 ± 0.3 d
 0.0001
 ns
 ns
 Total SCFA pool, mmol
 69 ± 7 a
 160 ± 14 b
 184 ± 26 b
 213 ± 20 b
 215 ± 23 b
 0.0001
 0.0163
 ns
 Digesta pH
 7.3 ± 0.1 c
 6.3 ± 0.1 b
 6.0 ± 0.1 ab
 6.0 ± 0.1 ab
 5.8 ± 0.1 a
 0.0001
 ns
 ns
Faeces
  
  
  
  
  
  
  
  
Faecal output g/d
 1.7 ± 0.1 a
 3.0 ± 0.2 ab
 3.7 ± 0.3 b
 5.8 ± 0.6 c
 8.3 ± 0.5 d
 0.0001
 0.0284
 ns
Faecal fat2, g/d 0.15 ± 0.02 0.09 ± 0.01 0.11 ± 0.02 0.09 ± 0.01 0.13 ± 0.01 ns ns ns

1 Values are means ± SEM. Labelled means without a common letter differ, P < 0.05. ns = not significant, P > 0.05. All dietary treatments consist of n=8 obesity-prone and n=12 obesity-resistant rats.

2n=8 (n=4 obesity-prone and n=4 obesity-resistant rats per group).

3 obesity-prone 188 ± 11 mmol, obesity-resistant 149 ± 11 mmol.

4 obesity-prone 4.9 ± 0.5 g/d, obesity-resistant 4.3 ± 0.2.