Effects of feeding outer bran fraction of rice on lipid accumulation and fecal excretion in rats

Figures & data

Table 1. Chemical composition of WRB and OBFR used in this study.

	OBFR	WRB
Moisture (g/100 g)	7.60	7.40
Crude protein (g/100 g)	13.70	14.50
Crude fat (g/100 g)	23.50	24.50
Crude fiber (g/100 g)	27.60	26.20
Ash (g/100 g)	10.30	10.30
Gross energy (kcal/100 g)	3.91	3.99
γ-oryzanol (mg/100 g)	243.55	202.54
Phytic acid (mg/100 g)	499.65	412.79

Note: OBRF, outer bran fraction of rice bran; WRB, whole rice bran.

Table 2. Composition of experimental diets.

	Control diet	OBFR diet	WRB diet
Ingredients (g/100 g)
Cornstarch	52.95	45.77	45.40
Casein	20.00	17.34	16.96
Sucrose	10.00	10.00	10.00
Corn oil	7.00	3.70	3.48
Cellulose	5.00
Mineral mix (AIN-93)	3.50	3.50	3.50
Vitamin mix (AIN-93)	1.00	1.00	1.00
l-cystine	0.30	0.30	0.30
Choline chloride	0.25	0.25	0.25
WRB			19.11
OBFR		18.14

Note: OBRF, outer bran fraction of rice bran; WRB, whole rice bran.

Table 3. Effects of feeding OBFR on growth performance in rats.

	Control (n = 7)	OBFR (n = 7)	WRB (n = 7)
Body weight gain (g/21 days)	133.61 ± 4.68	121.56 ± 6.95	135.93 ± 5.48
Feed intake （g/day)	22.23 ± 0.78	21.15 ± 0.53	21.86 ± 0.50
Feed efficiency	0.29 ± 0.01	0.27 ± 0.01	0.30 ± 0.01
Water intake (mL/day)	21.03 ± 0.52	23.27 ± 0.98	21.92 ± 0.60

Notes: Values are means ± SEM. OBFR, outer bran fraction of rice bran; WRB, whole rice bran.

Table 4. Effects of feeding OBFR on fecal excretion, fecal lipid content, fecal bile acid content, and lipid content in liver of rats.

	Control (n = 7)	OBFR (n = 7)	WRB (n = 7)
Fecal excretion
Number (number/day)	20.00 ± 0.91	26.97 ± 5.26*	28.78 ± 5.73*
Wet weight (g/day)	1.66 ± 0.06	2.37 ± 0.10*	2.23 ± 0.08*
Dry weight (g/day)	1.48 ± 0.04	1.89 ± 0.05*	1.82 ± 0.07*
Fecal bile acid content (mg/g feces)	4.82 ± 0.37	5.94 ± 0.43*	6.15 ± 0.38*
Fecal lipid content (%)	4.12 ± 0.16	6.19 ± 0.51*	6.57 ± 0.46*
Liver lipid content (%)	7.02 ± 0.33	5.62 ± 0.20*	5.45 ± 0.18*

Notes: Values are means ± SEM. OBFR, outer bran fraction of rice; WRB, whole rice bran.

* P < 0.05 (vs. control).

Table 5. Effects of feeding OBFR on body weight, tissue weights, and cecal pH in rats.

	Control (n = 7)	OBFR (n = 7)	WRB (n = 7)
Final body weight (g)	381.73 ± 5.35	369.63 ± 8.28	384.07 ± 5.96
Liver (g/100 g body weight)	3.86 ± 0.12	3.56 ± 0.06	3.79 ± 0.10
Heart (g/100 g body weight)	0.31 ± 0.01	0.31 ± 0.03	0.32 ± 0.02
Kidney (g/100 g body weight)	0.33 ± 0.01	0.33 ± 0.01	0.34 ± 0.01
Total abdominal fat (g/100 g body weight)	5.70 ± 0.27	4.42 ± 0.42*	4.73 ± 0.26
Mesenteric fat (g/100 g body weight)	1.68 ± 0.15	1.21 ± 0.13*	1.47 ± 0.12
Retroperitoneal fat (g/100 g body weight)	2.31 ± 0.20	1.78 ± 0.20	1.76 ± 0.14
Epididymal fat (g/100 g body weight)	1.71 ± 0.09	1.44 ± 0.17	1.51 ± 0.14
Cecum (g/100 g body weight)	0.18 ± 0.01	0.20 ± 0.01	0.22 ± 0.01
Cecal pH	7.89 ± 0.05	7.07 ± 0.04*	7.03 ± 0.05*

Notes: Values are means ± SEM. OBFR, outer bran fraction of rice; WRB, whole rice bran.

* P < 0.05 (vs. control).

Table 6. Effects of feeding OBFR on plasma lipid and glucose profiles in rats.

	Control (n = 7)	OBFR (n = 7)	WRB (n = 7)
Total cholesterol (mg/dL)	88.86 ± 8.85	69.86 ± 7.70	77.29 ± 5.79
Triacylglycerol (mg/dL)	182.86 ± 21.58	106.57 ± 14.36*	170.14 ± 21.49
Glucose (mg/dL)	164.43 ± 6.77	151.00 ± 7.88	162.29 ± 6.45

Notes: Values are means ± SEM. OBFR, outer bran fraction of rice; WRB, whole.

* P < 0.05 (vs. control).