Effect of Dietary β-Glucan on Serum Lipids and
Performance Indices in Rats Fed a Diet Enriched with Cholesterol
Tanay Bilal*, Feraye
Esen Gursel1, Atila Ates1 and Onur Keser
Department of Animal Nutrition and Nutritional
Diseases, 1Department of Biochemistry, Faculty of
Veterinary Medicine, Istanbul University, 34320 Avcilar, Istanbul,
Turkey
*Corresponding author: tanbilal@istanbul.edu.tr
Abstract
The aims of this study were to investigate
effects of β-glucan on body weight gain, food intake, food conversion ratio and
serum total cholesterol, high-density lipoprotein cholesterol (HDL-cholesterol),
low-density lipoprotein cholesterol (LDL-cholesterol) and triglyceride levels in
female rats fed
hypercholesterolemic diet. Female Sprague-Dawley
rats (8-weeks-old) weighing 161.78±3.88 g were divided into three equal groups. Group 1
(control) was fed basal diet (2% liquid-vegetable oil, 0% cholesterol), group 2
was fed high-cholesterol diet (2% liquid- vegetable oil, 15% hydrogenated-oil
and 1.5% cholesterol) and group 3 was fed high-cholesterol diet with 1% β-glucan.
The trial period was 30 days. Blood samples were withdrawn on days 0 and 30.
Also, all rats were weighed on same days. Serum total cholesterol,
HDL-cholesterol, LDL-cholesterol and triglyceride levels were detected with
commercial kits by auto-analyzer. Body weight gain, food intake and food
conversion ratio, and serum total cholesterol and LDL-cholesterol levels were
significantly lower (P<0.05) in group 3 (the group fed fatty and added β-glucan)
than in the other two groups. Serum HDL-cholesterol and triglyceride levels were
not significant between all groups at the end of the study.β-glucan supplementation negatively affected food intake. However, β-glucan
effectively lowered serum LDL-cholesterol and total cholesterol
concentrations without affecting HDL-cholesterol and
triglyceride levels. Therefore,
β-glucan may decrease the cholesterol synthesizing ability of liver and the risk
for atherosclerotic vascular disease.
Key words:
β-glucan,
Cholesterol,
Hypercholesterolemic rat, Lipoprotein