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Whitening Effects of Angelica dahurica Radix Ethanol Extract

백지 에탄올추출물의 미백효능 연구

  • Kim, Pil-Sun (Dept. of Herbal Skin Care, Daegu Haany University)
  • 김필순 (대구한의대 한방피부미용학과)
  • Received : 2011.07.21
  • Accepted : 2011.09.08
  • Published : 2011.09.30

Abstract

To investigate whitening Effects of Angelica dahurica Radix Ethanol Extract (ADEE), we used melan-a cell line, brown guinea pig, and HMB-45. We treated with ADEE of 6.25, 12.5, 25, and 50 ${\mu}g/m{\ell}$ concentration in order to evaluate the effect of ADEE on cell viability and on morphological observation of melan-a cells. Also we were induced the artificial tanning spots by 1,500 mJ/$cm^2$ of ultraviolet B radiation on the backs of brown guinea pigs (approximately 450~500g) and then the test agent of $30{\mu}{\ell}$ was applied on the spots twice a day, five days a week, for five weeks respectively. The visible whitening effect was evaluated once a week. At the end of the experiment, the animals were sacrificed under anesthetization. The artificial tanning spots were obtained by biopsy punch and stained with HMB-45 to observe the gp100 proteins which were melanosomes. Our results show that cell viability was not reduce at ADEE concentrations between 6.25 and 50 ${\mu}g/m{\ell}$, melanin synthesis and melanocyte dendricity were decreased in ADEE treated melan-a cells increasing ADEE concentration. In the gross observation, ADEE treated groups had lower pigmentation than the vehicle control groups. And in the histological observation, ADEE treated groups had lower melanocytes than the vehicle control groups. Also in the quantitative analysis of the gp100 proteins using image analysis software, ADEE treated groups had a significantly lower value (p<0.001) than the vehicle control group and this resultsagreed with the results of observation under microscope. From these results, weconcluded that ADEE had positive whitening effect.

본 논문은 백지 에탄올추출물의 미백효능을 조사하기 위하여 melan-a cell, 브라운 기니피그 및 HMB-45 염색을 사용하였다. melan-a 세포에 시료를 6.25, 12.5, 25, 50, ${\mu}g/m{\ell}$ 농도로 처치하여 세포 생장율의 변화 관찰 및 멜라닌세포의 형태학적 변화를 관찰하였다. 또한 brown guinea pig (450~500 g)등 부위에 1500 mJ/$cm^2$ 광량의 ultraviolet B조사로 유발시킨 인공색소반 (${\Phi}$ 2 mm)에 1일 2회, 주 5일, 매회 30 ${\mu}{\ell}$씩 총 5주간 시료를 도포하여 주 1회 육안적 변화를 관찰 하였고, 실험 5주째 되는 날 실험동물은 염산 케타민으로 마취 후 시료를 도포한 인공색소반 부위를 biopsy punch로 절취하여 HMB-45 염색으로 멜라닌소체 내 glycoprotein(gp100) 단백질의 조직학적 변화를 관찰 하였다. 세포생장율 측정에서 시료처치 6.25~50 ${\mu}g/m{\ell}$에서의 세포생장율은 높았고, 멜라닌세포의 형태학적 변화에서는 시료처치 농도가 증가할수록 멜라닌합성 및 수지상 돌기가 적게 관찰 되었다. 동물 실험 육안적 관찰에서 시료 도포군이 용매대조군에 비해 멜라닌 색소침착 정도가 확연하게 밝아졌고, gp100 단백질의 조직학적 관찰에서 시료 도포군은 gp100 단백질 발현 정도가 현저하게 줄어들었으며, 영상분석에서도 시료 도포군이 용매대조군에 비해 유의하게(p<0.001) 감소하였는데 이러한 결과는 현미경 관찰 결과와 일치하였다. 이상의 결과를 종합하면 백지 에탄올추출물은 우수한 미백효과가 있는 것으로 판단된다.

Keywords

References

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