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NTIS 바로가기韓國營養學會誌 = The Korean journal of nutrition., v.46 no.2, 2013년, pp.109 - 118
민지현 (경희대학교 동서의학대학원 의학영양학과) , 이윤주 (경희대학교 동서의학대학원 의학영양학과) , 한상미 (농촌진흥청 농업생물부) , 조윤희 (경희대학교 동서의학대학원 의학영양학과)
Ultraviolet (UV) irradiation reduces epidermal hydration, which is paralleled by the reduction of natural moisturizing factors (NMFs). Of various NMFs, free amino acids (AAs) are major constituents generated by filaggrin degradation. In this study, we attempted to determine whether dietary supplemen...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
피부의 기능은? | 피부는 자외선 등의 외부 환경 및 미생물의 침입으로부터 인체를 보호하는 방어 기능을 하며 동시에 수분 손실을 예방하여 보습 기능을 한다.1,2)건강한 피부 유지에 중요한 피부 보습은 표피의 가장 바깥층에 존재하는 피지막과 천연보습인자 (natural moisturizing factor, NMF)에 의해 유지되는데,3,4)지질 복합체인 피지막이 층상구조를 이루어 수분 손실을 억제 하는 반면 천연보습인자는 흡습 능력에 의해 수분을 직접적으로 보유한다. | |
천연보습인자란? | 천연보습인자는 젖산, 요소, 구연산 및 유리 아미노산과 pyr rolidone carboxylic acid (PCA), urocanic acid와 같은 아미노산 유도체의 혼합물로 각질층 무게의 20~30%를 차지한다.3,4,7,8)이 중 유리 아미노산은 표피 분화의 최종 단계에서 생성되는 특정 단백질인 필라그린의 대사산물이며,9,10)특히 serine과 glycine이 40% 이상을 차지한다. | |
필라그린과 유리아미노산의 관계는? | 천연보습인자는 젖산, 요소, 구연산 및 유리 아미노산과 pyr rolidone carboxylic acid (PCA), urocanic acid와 같은 아미노산 유도체의 혼합물로 각질층 무게의 20~30%를 차지한다.3,4,7,8)이 중 유리 아미노산은 표피 분화의 최종 단계에서 생성되는 특정 단백질인 필라그린의 대사산물이며,9,10)특히 serine과 glycine이 40% 이상을 차지한다.11)표피 아미노산의 유일한 전구단백질인 필라그린은12) 10개 이상의 필라그린 복합체인 profilaggrin으로 최초 생성되는데,2,13,14) profilaggrin은 내부 serine 잔기의 광범위한 인산화로 인하여 극도의 불용성을 띄며 불활성화 상태로 과립층 (stratum granulosum)에서 생성되어 우선 저장된다. |
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