Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Dietary Effects of Fiber Produced from G\ulcorneruconocacetobacter hansenii on Digestive Tract and Lipid Metabolism in Rats

Gluconoacetobacter hansenii에 의해 생산된 섬유소 섭취가 흰쥐의 소화기관과 지질대사에 미치는 영향

  • 조성희 (대구가톨릭대학교 식품영양학과) ;
  • 이지연 (대구가톨릭대학교 식품영양학과) ;
  • 최경호 (대구가톨릭대학교 식품영양학과) ;
  • 최영선 (대구대학교 식품영양학과)
  • Published : 2002.10.01
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Abstract

This study was conducted to see effects of dietary bacterial fiber produced by Gluconoucetobacter hansenii on gross structure, and disaccharidase activities of small intestine and body lipid status in rats. Bacterial fiber was prepared by drying and alkali treatment of floating membrane produced IS days after the bacterial culture using coconut juice media. Male Sprague-Dawely rats of 320+10 g were grouped into three and fed 0.5% (w/w) cholesterol diets with three different dietary fibers, i .e. cellulose, and pectin and bacterial fiber, at the level of 2% (w/w). During four-week experimental period, food intakes and body weight gains were not different among three groups. Total lengths and jejunal fragment weights of small intestine did not differ among the three groups but cecal weight was higher in bacterial fiber groups than those of the other two groups. Colon content and fecal dry weight were lower in bacterial fiber group. Sucrase activity of the jejunal mucosa was lower in bacterial fiber group but maltase activity was not different from those of the other two groups. Plasma total cholesterol level was lower and that of HDL-cholesterol higher in pectin group than those of cellulose and bacterial fiber groups, the latter of which did not differ. Both in plasma and liver triglyceride levels were lower in bacterial fiber group than cellulose and pectin groups, and liver cholesterol level was lower in pectin group. Relative liver weights and Plasma activities of GOT md GPT were not different among three groups. It is concluded that bacterial fiber used in the present study had hypotriglyceridemic effect that help improve lipid status in the body.

본 실험은 초산균인 Glwonncetobacter hansenii에 의해 코코넛 배지에서 생성된 막인 bacterial fiber가 흰쥐의 장 전반과 소장의 이당류 효소활성 및 체내 지질상태에 미치는 영 향을 조사하였다. 이를 위하여 흰쥐를 0.5% 콜레스테롤 식이로 사육하였으며 섬유소원으로 bacterial fiber를 식이의 2%로 첨가 하였으며, 효과를 비교할 실험군들에게는 섬유소원으로 식물성 cellulose와 pectin을 같은 수준으로 식이에 첨가하여 사육 하였다. 실험 4주간 동안 식이섭취량 및 체중 증가량은 세군간에 차이가 없었다. 소장의 길이, 무게 등은 군간에 유의적인 차이는 없었으나 소장점 막 sucrase활성이 bacterial fiber군에서 감소하였고, maltase 활성도 감소하는 경향이었다. 맹장의 무게가 bacterial fiber군에서 증가하였으나, 결장의 무게에는 영향이 없었고, 결장 내용물 및 건조분변량이 감소하였다 혈장 총 콜레스테롤 농도는 세군중에서 pectin군이 유의적으로 낮았고 HDL-콜레스테롤 함량은 반대로 pectin군에서 높았다. 혈장과 간조직의 중성지방 함량은 모두 bacterial fiber군에서 다른 군들에 비하여 유의적으로 낮았다. 간조직 콜레스테롤 함량은 pectin군에서 낮았다. 간조직의 상대적 무게는 군간에 차이가 없었고, 혈장 GOT 및 GPT 활성도 bacterial fiber군에서 다른 두 군에 비하여 차이가 없었다. 본 연구의 결과, 실험에서 사용한 bacterial fiber는 체내의 중성지방 수준을 낮추어 지질 상태를 개선 할 수 있는 가능성을 보여 주어 이에 대한 기전과 이 작용의 활용에 대한 연구가 요망된다. 본 실험에서는 콜레스테롤 및 소장의 구조와 소화효소에는 큰 영향을 주지 않았으나 사용하는 섬유소의 수준을 보다 높이거나 다른 섬유소와 복합적으로 사용하는 경우, 또 동물의 나이에 따라 다른 결과가 도출될 수도 있으리라고 사료되어 앞으로의 지속적인 연구가 필요하다.

Keywords

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