중금속 흡착능 Leuconostoc mesenteroides CJNU 0705 균주를 활용한 피부 건강기능성 소재 개발
Development of Skin Health Promoting Materials Using Leuconostoc mesenteroides
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Leu. mesenteroides CJNU 0705 균주는 모유에서 분리되었으며 16S rRNA 유전자 염기서열 분석과 자당(2%)이 포함된 tryptic soy agar plate상에서의 덱스트란 생성능을 통하여 동정하였다. Leu. mesenteroides CJNU 0705 균주는미세먼지 속에 존재하는 피부 유해성 중금속인 납과 카드뮴에 대한 흡착능이 있으며 이러한 성질은 사균 상태에서도 확인되었다. 또한 Leu. mesenteroides CJNU 0705 균주는 여드름 원인균인 P. acnes 균주에 대하여 항균활성을 나타내었다. 마지막으로 피부 건강기능소재로 잘 알려진 녹차, 당근, 개똥쑥, 파슬리, 브로콜리 및 옥수수수염 추출물을 기본배지(A)로 하여 2% 자당(B) 혹은 2% 자당과 3% 효모추출물(C)을 각각의 추출물에 첨가한 후 Leu. mesenteroides CJNU 0705 균주를 접종 및 배양하여 덱스트란 생산량을 확인한결과 C 배지가 최적배지로 확인되었으며 덱스트란의 생산은주사전자현미경 사진으로도 관찰되었다. 결론적으로 모유 유래의 Leu. mesenteroides CJNU 0705 균주나 이를 이용한천연발효추출물은 피부 건강기능소재로 활용될 수 있을 것이다.
Abstract
Leuconostoc mesenteroides CJNU 0705 was isolated from a breast milk sample and identified by 16S rRNA gene sequencing and confirmed by its ability to produce dextran from tryptic soy agar plates supplemented with 2% sucrose. This strain can absorb various heavy metals including lead (Pb) and cadmium (Cd) which are both found in fine dust and have been shown to be harmful to human skin. In addition, Leu. mesenteroides CJNU 0705 has demonstrated antimicrobial activity against Propionibacterium acnes, the primary causative agent of acne. Given these traits it was natural to evaluate the use of this strain in the fermentation of several natural extracts from green tea, carrot, annual wormwood, parsley, broccoli, and corn silk, which are known to improve skin health, to see if it could increase their dextran content when supplemented with no sucrose, 2% sucrose, or 2% sucrose and 3% yeast extract. The extracts supplemented with both yeast and sucrose were found to produce the most dextran, which was confirmed by the scanning electron microscope (SEM) images. These results suggest that Leu. mesenteroides CJNU 0705 and its fermented natural extracts could be used as functional materials for improving human skin health.
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