Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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The Effects of Levan and Inulin on the Growth of Lactic Acid-Producing Bacteria and Intestinal Conditions in Rats

식이 레반과 이눌린이 흰쥐의 장내 유산균 성장 및 장내환경에 미치는 영향

  • 장기효 (경희대학교 동서의학대학원 임상영양학전공, 경희대학교 임상영양연구소) ;
  • 강순아 (경희대학교 동서의학대학원 임상영양학전공, 경희대학교 임상영양연구소) ;
  • 조윤희 (경희대학교 동서의학대학원 임상영양학전공, 경희대학교 임상영양연구소) ;
  • 김윤영 (경희대학교 동서의학대학원 임상영양학전공) ;
  • 이윤정 (경희대학교 동서의학대학원 임상영양학전공) ;
  • 홍경희 (경희대학교 동서의학대학원 임상영양학전공) ;
  • 장은경 (㈜리얼바이오텍) ;
  • 김철호 (㈜리얼바이오텍, 경희대학교 임상영양연구소) ;
  • 조여원 (경희대학교 동서의학대학원 임상영양학전공, 경희대학교 임상영양연구소)
  • Published : 2002.11.01
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Abstract

In nature, two different types of fructose polymers (fructan) are generally found in dietary fibers; these are the fructose homopolymers levan, which is of high molecular weight and is $\beta$-(2,6)-linked, and inulin, which is of low molecular weight and is $\beta$-(2,1)-linked. The effects of levan and inulin on the intestinal physiology of rats were compared. Sprague Dawley rats were fed one of three diets for 3 weeks: a control diet, a basal diet containing 7% of levan, and a basal diet containing 7% of inulin. Cecal enlargement, together with the lowering of cecal pH, occurred in rats fed on the levan and inulin diets (p < 0.05). The levan and inulin diets resulted in a two-fold increase in the amount of short-chain fatty acids in the cecum, when compared to the control diet. The number of total microbes and of lactic acid-producing bacteria in the feces were higher in rats fed the fructan diets than those in rats fed control diet (p < 0.05). The levan diet also significantly increased the cecal $\alpha$-galactosidase activity by 3.8-fold, when compared to the control diet, indicating that levan stimulated the growth of Bifidobacteria in the cecum. These results show that the intake of levan and inulin stimulated the growth of lactic acid-producing bacteria in the cecum and thereby improved intestinal conditions in rats. (Korean J Nutrition 35(9) : 912~918,2002)

Keywords

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