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KMID : 0613820120220101307
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Journal of Life Science
2012 Volume.22 No. 10 p.1307 ~ p.1315
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Effect of Dietary Benzoic Acid on Beneficial Microflora and Immune Response in the Intestine of Weaning Pigs
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Oh Hee-Kyung
Choi Young-Hwan
Jin Ying-Hai
Kim Yoo-Yong
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Abstract
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We evaluated the effect of dietary supplements with benzoic acid on intestinal beneficial bacteria concentration and immune response of weaning pigs. Supplementation with benzoic acid at 0.5% or control diet for 35 days resulted in a higher Lactobacillus casei concentration in the cecum. Supplementation with benzoic acid at 0.5% increased concentration of L. plantarum in the cecum. Pigs with the control diet and 0.5% benzoic acid had significantly increased concentration of B. subtillis in the cecum compared to the antibiotic group, while the concentration of B. subtillis in the rectum increased in pigs given 0.3 and 0.5% benzoic acid (p<0.05). Compared with the control group, the level of interleukin-1β mRNA showed a significant decrease in the proximal small intestine in pigs fed diets supplemented with benzoic acid at 0.5% or antibiotic. Feeding 0.5% benzoic acid resulted in a marked reduction in the expression of IL-6 mRNA in the middle small intestine (p<0.05). Supplementation with benzoic acid at 0.5% or antibiotic resulted in a lower level of tumor necrosis factor-mRNA in the middle intestine. Up to 0.5% benzoic acid may be included in weaning diets for improvement of intestinal beneficial bacteria, thus modulating genes of pro-inflammatory cytokines in the gastrointestinal tract.
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KEYWORD
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Benzoic acid, weaning pig, health beneficial bacteria, proinflammatory cytokine mRNA, immune response
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