Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effects of Capsosiphon fulvescens Extracts on Essential Amino Acids Absorption in Rats

매생이 열수추출물이 흰쥐의 필수아미노산 흡수에 미치는 영향

  • Kim, Hyo-Young (Faculty of Food Science and Biotechnology, Pukyong National University) ;
  • Kim, In-Hye (Faculty of Food Science and Biotechnology, Pukyong National University) ;
  • Nam, Taek-Jeong (Faculty of Food Science and Biotechnology, Pukyong National University)
  • 김효영 (부경대학교 식품생명공학부) ;
  • 김인혜 (부경대학교 식품생명공학부) ;
  • 남택정 (부경대학교 식품생명공학부)
  • Published : 2009.11.30
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Abstract

The aim of this study was to examine the effects of Capsosiphon fulvescens extract (CFE) on levels of essential amino acids in serum and the rate of protein digestion. CFE contains approximately 68% carbohydrate as fiber, 17% crude ash, and 14% crude protein. Experimental rats were divided two groups, one group receiving a normal diet and the other a normal diet containing 5% CFE. To analyze the absorption of essential amino acids into the hepatic portal vein, blood from the hepatic portal vein was collected between 10 a.m. and 5 p.m. for 10 days. In vitro protein digestion was decreased in the group fed 5% CFE; these data indicated that CFE affected protease activity. We measured the absorption of essential amino acids in the serum of the hepatic portal vein, at 30-, 60-, 90-, and 120 minutes after feeding. Although there was no difference in the concentration of total essential amino acids between the two groups, the 5% CFE-fed animals had a decreased rate of absorption. Absorption of Lys and Thr into the hepatic portal vein was lower in the CFE-fed group than in the control group. The rate of absorption of Met was delayed nearly 50% in the CFE-fed group compared to the control group. On the other hand, the rate of absorption of Leu, Ile, and Val was increased; Phe showed the same. Therefore, we suggest that CFE could affect protein metabolism by increasing or decreasing the absorption rate of essential amino acids.

이 실험의 목적은 해조류 중 특히 필수 아미노산 함량이 높은 매생이 열수 추출물(Capsosiphon fulvescens Extracts, CFE) 5%를 첨가한 식이를 급이 시켜 흰쥐에게 10일간의 단백질 소화율, 혈중 필수 아미노산 변화에 미치는 영향을 규명하고 사료의 품질 및 필수 아미노산 대사와 관련된 연구에 기초자료를 마련하는데 그 목적을 두고 본 실험을 하였다. CFE의 급이에 따른 단백질 소화율을 살펴 본 결과, casein 그룹의 경우 단백질 소화율이 약 97%인 반면 CFE가 포함된 그룹의 경우 87%로 유의적으로 감소하는 것으로 나타났다. 실험 식이에 CFE 첨가 시 단백질 소화율이 유의적으로 감소시키는 것으로 나타났다. 간문맥 혈청 중의 아미노산에서 특히 필수 아미노산의 혈중 흡수에 미치는 영향을 식이 후 30, 60, 90, 120분별로 살펴보았다. 총아미노산과 필수 아미노산의 농도는 두개의 군에서 차이가 없었다. BCAA에 속하는 Leu, Ile, Val은 C군에 비해 CFE군에서 흡수속도가 증가하였으며 AAA에 속하는 Phe 또한 동일한 경향을 보여주었다. 간문맥 혈중의 Lys, Thr, Met의 경우, C군에 비해 CFE군에서 흡수속도가 지연되는 것으로 나타났다. 이 실험을 통해 식이섬유인 매생이 열수추출물을 섭취함으로서 간이나 뇌, 조직 등으로 흡수되는 혈중 필수 아미노산의 흡수속도를 증가시키거나 지연시킴으로서 단백질 대사에 영향을 미치는 것으로 보인다. 따라서 단백질 식이에 매생이 열수추출물을 첨가할 경우 혈중 아미노산 흡수정도에 어떠한 영향을 미치는지에 대한 기초자료를 마련 하였으며 이후 더 많은 연구가 필요한 것으로 보인다.

Keywords

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