Journal of Society of Preventive Korean Medicine (대한예방한의학회지)

Society of Preventive Korean Medicine (대한예방한의학회)
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The Anti-bacterial Effects and Epidermal Permeability Barrier Function of Red Onion Juice Produced in Jeon-Nam province in Korea

전남 함평산 자색양파 추출물의 항균효과와 피부장벽 보호효과

  • Received : 2011.11.30
  • Accepted : 2012.02.10
  • Published : 2012.04.30
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Abstract

Objective : In this study, we assessed the anti-bacterial effects and epidermal permeability barrier function of red onion juice comparing to yellow onion juice and $Houttuynia$ $cordata$ extract $in$ $vitro$. Methods : 3types of red and yellow onion juice were prepared as antibacterial agent candidates with Houttuynia cordata hot water extract using 4 different bacterial strains ($Escherichia$ $coil$, $Salmonella$ $enterica$ $subsp.$ $enterica$, $Staphylococcus$ $epidermidis$, $Staphylococcus$ $aureus$ $subsp$) by colony counting method. The expression of filaggrin, a marker of keratinocyte differentiation, and serine palmitoyl transferase (SPT), a marker of the formation of the stratum corneum lipid barrier, in human HaCat keratinocytes were analyzed using HaCaT cell line. The expression of COX-2 and AP-1 which is a factor of COX-2 transcription were also analyzed by western blotting method. Results : There was detectable anti-bacterial effects on $Staphylococcus$ $epidermidis$, $Staphylococcus$ $aureus$ $subsp$ among 1%, 5%, 10% extracts of yellow and red onion.(81%-100%) The bacteriocidal effects were not shown on $Escherichia$ $coil$, $Salmonella$ $enterica$ $subsp.$ $enterica$ among $Houttuynia$ $cordata$, yellow onion and red onion extracts. The in vitro results showed the concentration-dependent effects on the expression of both filaggrin and SPT in HaCat cells among 0.01%, 0.05%, 0.1%, 0.5% extracts in Houttuynia cordata and red onion, reflecting the notion that $Houttuynia$ $cordata$ and red onion can induce epidermal keratinocyte differentiation and improve the recovery of skin barrier functions. The concentration-dependent effects also have been shown on the expression of both COX-2 and AP-1 among 0.01%, 0.05%, 0.1%, 0.5% extracts in $Houttuynia$ $cordata$ and red onion, while slight effect in yellow onion. Conclusion : Red onion juice could be a potential candidate enhanser for the skin care and cosmetology.

1. 추출방법, 추출농도에 따라 항균력의 차이가 있었으나, 일반양파, 자색양파의 1%, 5%, 10% 생즙추출물 모두, 피부상재균인 Staphylococcus epidermidis(KCTC1917), Staphylococcus aureus subsp(ATCC6538)에 양호한 항균력을 보였다(81%~100%). 어성초 열수추출물은 10% 고농도에서만 피부상재균인 Staphylococcus epidermidis(KCTC1917), Staphylococcus aureus subsp(ATCC6538)에 항균력을 보였다(100%). 2. 자색양파, 어성초, 일반양파의 1%, 5%, 10% 추출물 모두, 식중독 균인 Escherichia coil, Salmonella enterica subsp. enterica에서는 항균력을 보이지 않았다. 3. 자색양파 추출물과 어성초 추출물을 0.01%, 0.05%, 0.1%, 0.5%로 처리하였을 때, 피부장벽 조절인자인 filaggrin과 SPT의 발현을 농도 의존적으로 증가시켰다. 반면, 일반양파 추출물도 농도 의존적으로 filaggrin과 SPT발현양을 증가시켰지만, 자색양파 추출물에 비하여 발현양이 많지 않았다. 4. 피부 염증 반응 인자에 미치는 영향을 알아보기 위해서 COX-2의 발현과 AP-1의 발현을 분석한 결과, 자색양파와 어성초의 0.01%, 0.05%, 0.1%, 0.5% 추출물에서 농도 의존적으로 COX-2의 발현과 AP-1의 발현이 감소하였다. 반면 일반양파 추출물도 농도 의존적으로 COX-2의 발현과 AP-1의 발현이 감소하였으나, 자색 양파 추출물에 비하여 감소양이 적었다. 5. 자색양파 추출물과 어성초 추출물은 피부 장벽기능 조절인자인 filaggrin과 SPT의 발현양을 증가시켜 줌으로써, 피부의 수분 유지 기능을 강화하였고, 농도 의존적으로 피부 염증 반응 인자도 감소시켜 항염증효과가 있어, 피부미용기능재료로서의 가능성 보여주었다.

Keywords

References

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