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

  • 제45권6호
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  • Pages.783-788
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  • 2016
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  • 1226-3311(pISSN)
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  • 2288-5978(eISSN)
한국식품영양과학회 (The Korean Society of Food Science and Nutrition)
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DOI QR코드

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흰쥐에서 수수추출물이 트랜스지방산이 함유된 지방과 콜레스테롤의 흡수에 미치는 영향

Sorghum Extract Lowers Lymphatic Absorption of Trans Fat and Cholesterol in Rats

  • 김주연 (국립창원대학교 식품영양학과) ;
  • 노상규 (국립창원대학교 식품영양학과) ;
  • 우관식 (농촌진흥청 국립식량과학원 기능성작물부) ;
  • 서명철 (농촌진흥청 국립식량과학원 기능성작물부)
  • Kim, Juyeon (Department of Food and Nutrition, Changwon National University) ;
  • Noh, Sang Kyu (Department of Food and Nutrition, Changwon National University) ;
  • Woo, Koan-Sik (Department of Functional Crop, National Institute of Crop Science, Rural Development Administration) ;
  • Seo, Myung-Chul (Department of Functional Crop, National Institute of Crop Science, Rural Development Administration)
  • 투고 : 2016.01.21
  • 심사 : 2016.03.28
  • 발행 : 2016.06.30
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초록

본 연구는 수수의 섭취가 대표적인 트랜스지방산인 elaidic acid, linoelaidic acid와 cholesterol의 소장흡수에 어떤 영향을 미치는지를 조사하기 위하여 설계하였다. 소장의 지방흡수를 in vivo 상태에서 측정하기 위해 소장흡수율 측정모델을 이용하여 십이지장주입관과 림프채취관을 삽입하는 미세수술을 진행하였다. 실험동물의 십이지장으로 $146.4{\mu}mol$ trielaidin, $36.8{\mu}mol$ trilinoelaidin, $452.0{\mu}mol$ triolein, $1.0{\mu}Ci$ $^{14}C-cholesterol$, $20.7{\mu}mol$ cholesterol, $396.0{\mu}mol$ Na-taurocholate, PBS buffer(pH 6.4)가 포함된 지질유화액만 공급받는 동물군을 대조군, 수수추출물이 혼합된 지질유화액을 공급받는 동물군을 수수군으로 설계하였다. 지질유화액은 시간당 3 mL씩 8시간 동안 주입하면서 림프관으로 흡수되는 elaidic acid, linoelaidic acid와 각종 지방산 그리고 $^{14}C-cholesterol$의 양을 분석하여 수수에 의한 영향을 비교하였다. 먼저 8시간 동안 분비된 림프액의 양은 대조군과 수수군 간에 유의적인 차이를 나타내지 않았다. 하지만 8시간 동안의 elaidic acid 흡수는 수수추출물의 공급으로 유의적으로 억제되는 것으로 나타났다. Linoelaidic acid 또한 마찬가지로 수수추출물 공급으로 유의적으로 그 흡수가 억제된 것으로 나타났다. 트랜스지방산을 비롯해 palmitic acid, stearic acid, oleic acid, linoleic acid, arachidonic acid, docosahexaenoic acid, $^{14}C-cholesterol$ 또한 대조군보다 수수군에서 흡수가 유의적으로 억제된 것으로 나타났다. 이상의 결과들은 수수추출물이 트랜스지방산과 cholesterol의 소장 흡수를 억제할 수 있다는 사실을 증명한다. 이번 연구를 바탕으로 수수 섭취가 트랜스지방이나 cholesterol의 흡수를 농도 비례적으로 억제할 수 있을지, 소화흡수 과정 중 정확히 어떤 과정에 영향을 미쳤는지에 관한 연구가 앞으로 진행될 과제라고 판단된다.

Excessive intake of trans fats is a risk factor for cardiovascular diseases. Previously, we showed that green tea extract lowers intestinal absorption of cholesterol and elaidic acid in rats. This study was conducted to investigate a possible role for sorghum extract on lymphatic absorption of trans fat and cholesterol in rats. Adult male rats with lymph cannulae were infused at a rate of 3.0 mL/h for 8 h via a duodenal catheter with a lipid emulsion containing $146.4{\mu}mol$ of trielaidin, $36.8{\mu}mol$ of trilinoelaidin, $452.0{\mu}mol$ of triolein, $1.0{\mu}Ci$ cholesterol labeled with $^{14}C$ ($^{14}C-cholesterol$), $20.7{\mu}mol$ of cholesterol, and $396.0{\mu}mol$ of Na-taurocholate without or with 100.0 mg of sorghum extract in phosphate-buffered saline buffer (pH 6.4). Lymph was collected hourly for 8 h. No significant difference was noted in lymph flow. However, the lymphatic absorption of elaidic acid and linoelaidic acid for 8 h was significantly lower in rats infused with sorghum extract than in those infused with no sorghum extract. Further, lymphatic absorption of $^{14}C-cholesterol$ was reduced by sorghum extract, which was observed previously. These data indicate that sorghum extract has an inhibitory effect on the intestinal absorption of trans fat and cholesterol. The mechanism(s) by which sorghum extract lowers intestinal absorption of trans fat warrants further study.

키워드

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