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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Preparation and Characterization of Double-Layered Coated Capsule Containing Low Molecular Marine Collagen and γ-Aminobutyric Acid Producing Lactobacillus brevis CFM20

저분자 해양성 콜라겐과 γ-Aminobutyric Acid 생성 Lactobacillus brevis CFM20을 함유하는 이중코팅캡슐의 제조 및 특성

  • Kim, Sun-Yeong (Division of Food and Animal Science, Chungbuk National University) ;
  • Oh, Do-Geon (Division of Food and Animal Science, Chungbuk National University) ;
  • Kim, Kwang-Yup (Division of Food and Animal Science, Chungbuk National University)
  • 김선영 (충북대학교 식품생명.축산과학부) ;
  • 오도건 (충북대학교 식품생명.축산과학부) ;
  • 김광엽 (충북대학교 식품생명.축산과학부)
  • Received : 2017.04.18
  • Accepted : 2017.06.23
  • Published : 2017.07.31
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Abstract

This study was performed to encapsulate low molecular weight marine collagen and ${\gamma}$-aminobutyric acid (GABA)-producing lactic acid bacteria to inhibit degradation and improve survival rate during exposure to adverse conditions of the gastro-intestinal tract. Calcium-alginate method was used for the manufacture of a double-layered coated capsule. The inner core material was composed of collagen and lactic acid bacteria, and the coating materials were alginate and chitosan. The sizes and shapes of the double-coated capsule were affected mainly by centrifuge speed and pH. Manufactured capsules were observed with a scanning electron microscope and by confocal laser scanning microscopy to confirm the micromorphological changes of capsules and bacterial cells. As a result, double-layered coated capsules were not degraded at pH 1.2, whereas degradation occurred at pH 7.4. In addition, GABA and collagen were maintained in stable state at pH 1.2. Therefore, double-layered coated capsules developed in this study would not be degraded in the stomach and could be stably delivered to the small intestine to benefit intestinal and dermatic health.

본 연구는 저분자 해양성 콜라겐과 GABA 생성 L. brevis CFM20의 섭취 시 다양한 인체 장내 조건에 의한 유산균의 사멸과 콜라겐의 분해를 최소화하고자 진행되었다. 유산균과 저분자 해양성 콜라겐의 안정성을 향상하기 위하여 alginate와 chitosan을 이용하여 이중코팅캡슐을 제조하였다. L. brevis CFM20의 온도별 생육특성을 분석하여 캡슐화에 유리한 배양온도를 조사한 결과 $37^{\circ}C$에서 배양한 균의 대수기가 가장 빠르고 GABA양 또한 $400{\mu}g/mL$로 가장 높은 수치를 나타내어 생육속도에서 가장 유리한 것으로 나타났다. Calcium-alginate bead 법으로 캡슐을 제조한 결과 1~2 mm 사이의 일정한 구형의 캡슐을 제조하였으며, chitosan을 이용하여 이중코팅캡슐을 제조한 결과 캡슐의 크기가 감소하였고 외형적으로도 더욱 단단해짐을 확인하였다. 제조된 이중코팅캡슐을 CLSM과 SEM을 이용하여 관찰한 결과, chitosan 코팅을 한 이중코팅캡슐의 표면이 alginate와의 가교결합에 의해 더욱 치밀해짐을 확인하였다. 체내 위와 장내 조건에서 시간에 따른 이중코팅캡슐의 L. brevis CFM 20 생균수를 분석한 결과 캡슐화한 경우 균의 감소가 더디어 더 안정하다고 판단하였다. 이중코팅캡슐을 체내 위와 장내 조건에서 시간에 따른 GABA와 hydroxyproline의 용출량을 분석한 결과 두 경우 모두 위 조건에서는 낮은 수치를 나타내었고 장내 조건에서는 시간이 지남에 따라 급격하게 증가한 것을 확인하였다. 동물실험 결과 콜라겐 섭취군이 비섭취군에 비해 체중증가량, 혈청 지질 농도 등이 적은 것을 확인하였고, 혈액 내 hydroxyproline 함량, 진피의 피부조직 밀도가 더 높은 것으로 관찰되었다. 본 연구에서 개발된 이중코팅캡슐을 섭취하는 경우 위에서는 안정한 상태였다가 장에 도달한 후 붕해됨으로 인하여, 유산균, GABA, 콜라겐 및 키토산의 작용으로 인체에 유익한 효과를 기대할 수 있을 것으로 생각된다.

Keywords

References

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