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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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The Effect of Dietary Modified Potato Starch By Chemically Denatured Treatment and Potato Starch on the Weight Loss, Lipid Metabolism and Redox Antioxidant System in High Fat Diet-Induced Obese Rats

화학적 변성 및 생감자 전분이 고지방식이로부터 유도된 비만 흰쥐의 지질대사 및 항산화계에 미치는 영향

  • Park, Soo-Jin (Dept. of Food Science and Nutrition, Hoseo University) ;
  • Choi, Mi-Kyeong (Dept. of Human Nutrition and Food Science, Chungwoon University) ;
  • Kim, Jin-Suk (Rural Resource Development Institute, NIAST, RDA) ;
  • Lim, Hak-Tea (Dept. of Plant Biotechnology, College of Bioscience and Biotechnology, Kangwon National University) ;
  • Kang, Myung-Hwa (Dept. of Food Science and Nutrition, Hoseo University)
  • 박수진 (호서대학교 식품영양학과) ;
  • 최미경 (청운대학교 식품영양학과) ;
  • 김진숙 (농촌진흥청 농업과학기술원 농촌자원개발연구소) ;
  • 임학태 (강원대학교 BT 특성화 학부대학 식물공학부 식물생물공학) ;
  • 강명화 (호서대학교 식품영양학과)
  • Published : 2008.10.31
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Abstract

For the first 42 days, we made rats obese by feeding them potato starch instead of corn starch and after that we fed them transformed potato starch by 4 groups for 70 days. The 4 groups are GPS group, SPS group, EZ group and H40 groups and each were fed normal potato, small potato, enzyme treated potato, and acid treated potato starches, respectively. We determined body weight and feeding efficiency, lipid profiles in serum, lipid peroxidation in tissues and redox antioxidant system as GSH and GP-x in vivo. As a result, there was no difference in the increment of body weight in the groups of GPS, EZ and H40. Therefore EZ group showed lower body weight increment than other groups. While GPS group and SPS group did not show significant difference in blood glucose, cholesterol level, LDL-cholesterol and TC, and their measured values were lower than those of EZ and H40 groups. No significant difference was found in HDL-cholesterol level except for GPS group. Furthermore, when calculating atherogenic index (AI) by HDL-cholesterol and TC contents, H40 group showed higher measured value than other groups. When measuring the lipid peroxidation in serum, kidney and liver tissues, the serum lipid peroxidation in H40 group was higher than others. In the tissue of liver and kidney, EZ and H40 groups showed significantly lower contents than others. The content of GSH showed different tendency in each tissue, but the measured value of GP-x activity was lower in SPS group.

AIN-93G 식이조성을 기본으로 corn starch를 potato starch로 100% 대치한 고지방식이를 42일간 rat에 급여하여 비만을 유도 후, GPS군, SPS군, EZ군, H40군으로 나누어 70일 급여한 후 지질대사에 미치는 영향을 살펴보았다. 그 결과, 체중증가량은 GPS, EZ, H40군에서 차이가 없었고 식이효율 또한 유의적으로 차이가 없었다. 혈중 혈당농도, TC, LDL-cholesterol 농도는 변성 전분 섭취 군(EZ, H40군)에서 높았고, atherogenic index는 H40이 다른 군에 비교해 높게 측정되어 H40군이 비만, 동맥경화에 미치는 영향이 크게 나타났다. 간과 신장 조직의 MDA 생성량은 H40군이 혈청 MDA 생성량이 다른 군에 비해 매우 높았고, 간과 신장 조직에서는 EZ, H40군이 낮았다. Glutathione 함량은 각 조직별로 경향이 달랐으나, GP-x활성은 SPS군에서 낮았다. 본 연구에서 전분을 달리하여 첨가한 고지방 식이가 비만한 식이에 미치는 영향을 살펴본 결과, 알감자 전분을 100% 대치하여 제조한 SPS군 및 효소 처리한 변성전분(EZ)을 100% 대치하여 급여한 군에서 비만억제 효과가 나타났다. 따라서 변성전분의 심혈관계 질환 및 혈중 지질 패턴 변화에 관련된 기전 연구가 지속적으로 필요하며, 생리활성이 규명된 후 다양한 가공식품 개발이 이루어져야 할 것으로 사료된다.

Keywords

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