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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Breads Containing Trans Fat, Soybean or Rice on Plasma Lipid and Fatty Acid Composition in Healthy Korean Adults

Trans 지방과 쌀, 콩을 첨가한 빵의 섭취가 건강한 성인 남녀의 혈장 지질 및 지방산 조성에 미치는 영향

  • Noh, Kyung-Hee (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University) ;
  • Huh, Young (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University) ;
  • Jang, Ji-Hyun (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University) ;
  • Kim, Soo-Hee (School of Culinary Art & Baking Technology, Dongju College) ;
  • Shin, Jin-Hyuk (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University) ;
  • Kim, Do-Hoon (Medical School, Korea University) ;
  • Lee, Seong-Hwan (Medical School, Korea University) ;
  • Lee, Kyung-Sik (Medical School, Gachon University of Medicine and Science) ;
  • Park, Yong-Kyu (Medical School, The Catholic University of Korea) ;
  • Cho, Kyung-Hwan (Medical School, Korea University) ;
  • Song, Young-Sun (BK21 Center of Smart Foods and Drugs, Food Science Institute, and Biohealth Product Research Center, Inje University)
  • 노경희 (인제대학교 BK21 식의약생명공학과, 식품과학연구소 및 바이오헬스 소재 연구센터) ;
  • 허영 (인제대학교 BK21 식의약생명공학과, 식품과학연구소 및 바이오헬스 소재 연구센터) ;
  • 장지현 (인제대학교 BK21 식의약생명공학과, 식품과학연구소 및 바이오헬스 소재 연구센터) ;
  • 김소희 (동주대학 외식조리제과계열) ;
  • 신진혁 (인제대학교 BK21 식의약생명공학과, 식품과학연구소 및 바이오헬스 소재 연구센터) ;
  • 김도훈 (고려대학교 의과대학) ;
  • 이승환 (고려대학교 의과대학) ;
  • 이경식 (가천의과학대학교 의과대학) ;
  • 박용규 (가톨릭대학교 의과대학) ;
  • 조경환 (고려대학교 의과대학) ;
  • 송영선 (인제대학교 BK21 식의약생명공학과, 식품과학연구소 및 바이오헬스 소재 연구센터)
  • Published : 2009.08.31
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Abstract

It has been reported that trans fat (tFA) may have adverse or beneficial effect depending upon the position and number of double bonds. The presence of tFA in human tissues and fluids is related to dietary intake, intestinal absorption, metabolism and storage, exchanges among compartments. This study investigated the effect of breads containing tFA, soybean or rice on postprandial plasma fatty acid and lipid composition. 33 healthy volunteers were divided into 3 groups and fed soybean bread, rice bread or wheat bread groups containing equivalent amounts of tFA (elaidic acid rich, 3.75 g/day), respectively. Postprandial lipid profiles at 0, 1, 2, 3 and 4 hours after a respective meal were studied. Plasma fatty acid was extracted by the method of Folch and methyl ester of fatty and prepared by acid transmethylation and analyzed by Gas Chromatography. Peaks were identified using pure reference compounds and quantified. Postprandial data indicated that consumption of soybean and rice breads with 3.75 g tFA retarded the appearance of C18:1 and C18:2 tFA in plasma lipid compared to that of wheat bread. Futhermore, soybean and rice bread groups showed lower plasma saturated fatty acid levels than wheat bread group. Postprandial TG level was significantly lowered in soybean bread group compared to that of rice and wheat bread groups. These results imply that soybean bread with high dietary fiber content and biologically active substances may inhibit or delay lipid absorption.

본 연구는 서울지역에 거주하는 건강한 성인 남녀(남자 23명, 여자 10명) 33명을 대상으로 trans 지방 3.75 g을 첨가 한 쌀 빵, 콩 빵과 밀 빵의 섭취가 식후 혈장에서의 지방산과 지질흡수에 미치는 효과를 확인하기 위하여 실시하였다. 시험군은 각 군 당 11명씩 3군으로 분류하였다. 쌀 빵은 밀가루 40 g과 쌀가루 40 g에 trans 지방 3.75 g을, 콩 빵은 콩가루 30 g과 밀가루 50 g에 trans 지방 3.75 g을 첨가하였고, 밀빵은 밀가루 80 g에 trans 지방 3.75 g을 첨가하여 식빵 형태로 각각 조제하였다. 대상자들은 8시간 공복 후 각각의 빵을 섭취하고 0, 1, 2, 3, 4시간 후 채혈하였고, 이는 혈중 지방산과 trans 지방산의 농도 및 지질 수준 분석에 이용되었다. 포화지방산인 C16:0과 C18:0의 수준은 밀 빵을 섭취한 군에서는 시간의 경과에 따라 유의적인 차이를 보였으나 콩 빵과 쌀 빵을 섭취한 군에서는 섭취 후 유사한 수준이었다. C16:0은 콩 빵과 밀 빵을 섭취한 군에서는 섭취 1시간 후에 peak에도달하였으나 시간이 경과함에 감소하는 경향을 보여 섭취4시간 후 밀 빵 군에서는 변화량은 섭취 전의 수준과 유사하였으나 콩 빵 군에서는 섭취하기 전보다도 낮아지는 것으로 나타났다. C18:0은 섭취 1시간 후 콩 빵과 쌀 빵을 섭취한군이 밀 빵을 섭취한 군에 비해 유의적으로 감소하였으나 콩 빵과 쌀 빵 군 간에 유의적인 차이는 없었다. Trans 지방산인 C18:1t과 18:2t는 세 군 모두에서는 섭취 2시간 후 가장 높은 수준을 보였으며 섭취 4시간 후에는 콩 빵 섭취한 군에서의 C18:1t의 혈중 농도가 가장 낮았다. C18:1c은 섭취 4시간 후 콩 빵 군에서 가장 낮았고 쌀 빵 군에서 가장 높았다. 또한 콩 빵의 섭취는 TG의 증가를 효과적으로 억제하였다. 이상의 결과로 미루어 볼 때 콩 빵의 섭취는 밀 빵을 섭취했을 때보다 혈중 trans 지방산을 비롯한 포화지방산 농도와 TG의 수준을 저하하였으며 이것은 콩에 함유된 식이섬유와 생리활성물질들이 지방산과 지방의 체내 흡수율을 저하시키거나 흡수속도를 느리게 하는 때문으로 사료된다. 따라서 trans 지방산을 비롯한 포화지방산과 TG의 체내 농도를 저하시키기 위해서는 밀 빵보다 콩 빵의 형태로 섭취하는 것이 유익할 것으로 사료된다.

Keywords

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