Nutr Res Pract.  2007 Dec;1(4):291-297.

Effect of dietary soluble fiber on neurohormonal profiles in serum and brain of rats

• Shin D

Abstract

This study was conducted to investigate the effect of dietary soluble fiber administration and /or high fat diet on serum and brain neurohormonal profiles, adipose tissue mass and body weight gain in Sprague-Dawley rats. Four groups of rats were respectively fed 10% fat diet (C), 10% fat plus pectin diet (P), 20% fat diet (HFC) and 20% fat plus pectin diet (HFP) for 4 weeks. In HFP group, the food and energy intake, body weight gain, FER including fecal excretion were the smallest (p<0.05). Serum HDL-cholesterol, triglyceride and glucose level were also the lowest in HFP group (p<0.05). The weight of brain, epididymal fat pad and adrenal gland except liver didn't show any significant differences among groups. Interestingly serum norepinephrine concentration of HFP group tended to be higher, but dopamine concentration tended to be lower than those of HFC group. However serum catecholamine concentration didn't show any significant differences among all groups. Norepinephrine and epinephrine contents of right portion of midbrain of P and HFP groups were remarkably lower than those of the C group. These results suggested that soluble fiber pectin consumption might affect neurohormonal profiles in serum and brain according to dietary fat level.

Keyword

Pectin; dietary fat level; norepinephrine; serum; brain

MeSH Terms

Adipose Tissue
Adrenal Glands
Animals
Body Weight
Brain*
Diet
Diet, High-Fat
Dietary Fats
Dopamine
Energy Intake
Epinephrine
Glucose
Liver
Mesencephalon
Norepinephrine
Rats*
Rats, Sprague-Dawley
Triglycerides
Dietary Fats
Dopamine
Epinephrine
Glucose
Norepinephrine

Figure

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  Fig. 1 Serum catecholamine concentration in experimental rats. (C group 10% fat & 5% cellulose /kg diet; P group 10% fat & 2.5% cellulose + 2.5% pectin / kg diet; HFC group 20% fat & 5% cellulose / kg diet; HFP group 20% fat & 2.5% cellulose + 2.5% pectin / kg diet)

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  Fig. 2 Serum catecholamine ratio in experimental rats (C group 10% fat & 5% cellulose /kg diet; P group 10% fat & 2.5% cellulose + 2.5% pectin / kg diet; HFC group 20% fat & 5% cellulose / kg diet; HFP group 20% fat & 2.5% cellulose + 2.5% pectin / kg diet)

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