Journal of Radiation Protection and Research

The Korean Association for Radiation Protection (대한방사선방어학회)
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Protective Effect of HemoHIM on Epidermal Melanocytes in Ultraviolet-B irradiated Mice

자외선 B 조사 마우스에서 표피멜라닌세포 변화에 대한 헤모힘의 방어효과

  • Lee, Hae-June (Korea Institute of Radiological & Medical Science) ;
  • Kim, Jong-Choon (College of Veterinary Medicine, Chonnam National University) ;
  • Moon, Chang-Jong (College of Veterinary Medicine, Chonnam National University) ;
  • Jung, U-Hee (Advanced Radiation Technology Institute, Jeongeup Campus of Korea Atomic Energy Research Institute) ;
  • Park, Hae-Ran (Advanced Radiation Technology Institute, Jeongeup Campus of Korea Atomic Energy Research Institute) ;
  • Jo, Sung-Kee (Advanced Radiation Technology Institute, Jeongeup Campus of Korea Atomic Energy Research Institute) ;
  • Jang, Jong-Sik (Department of Animal Science, Kyungpook National University) ;
  • Kim, Tae-Hwan (College of Veterinary Medicine, Kyungpook National University) ;
  • Kim, Sung-Ho (College of Veterinary Medicine, Chonnam National University)
  • Received : 2011.05.19
  • Accepted : 2011.06.24
  • Published : 2011.06.30
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Abstract

We induced the activation of melanocytes in the epidermis of C57BL/6 mice by ultraviolet-B (UV-B) irradiation, and observed the effect of an herbal preparation (HemoHIM, HH) on the formation, and decrease of UV-B-induced epidermal melanocytes. C57BL/6 mice were irradiated by UV-B $80\;mJ{\cdot}cm^{-2}$ ($0.5\;mW{\cdot}sec^{-1}$) daily for 7 days, and HH was intraperitoneally, orally or topically applied pre- or post-irradiation. For the estimation of change of epidermal melanocytes, light microscopic observation with dihydroxyphenylalanine (DOPA) stain was performed. Split epidermal sheets prepared from the ear of untreated mice exhibited 13~15 melanocytes${\cdot}mm^{-2}$, and one week after UV irradiation, the applied areas showed an increased number of strongly DOPA-positive melanocytes with stout dendrites. But intraperitoneal, oral or topical treatment with HH before each irradiation interrupted UV-B-induced pigmentation and resulted in a marked reduction in the number of epidermal melanocytes as compared to the number found in UV-B-irradiated, untreated control skin. The number and size of DOPA-positive epidermal melanocytes were also significantly decreased in intraperitoneally injected or topically applicated group after irradiation with HH at 3rd and 6th weeks after irradiation. The present study suggests the HH as inhibitor of UV-B-induced pigmentation, and depigmenting agent.

C57BL/6 마우스에서 자외선 B(UV-B) 조사에 의한 표피 멜라닌세포의 변화에 대한 헤모힘의 효과를 관찰하였다. 마우스에 UV-B를 매일 $80\;mJ{\cdot}cm^{-2}$ ($0.5\;mW{\cdot}sec^{-1}$)씩 7일간 조사하고 헤모힘을 UV 조사 전 또는 조사 후에 복강내주사, 경구투여 또는 피부에 도포하여 멜라닌세포 형성 억제효과 및 형성된 멜라닌세포에 대한 미백효과를 dihydroxyphenylalanine (DOPA) 염색으로 관찰하였다. 마우스의 귀등쪽 표피를 분리하여 관찰한바, 정상대조군에서는 $mm^2$당 13~15개의 멜라닌세포가 관찰되었다. 멜라닌세포 형성 억제 실험에서는 평균치를 기준으로 복강내주사군에서 44.9%, 경구투여군에서는 35.6%의 억제효과를 보였고, 피부도포군에서는 30% 이상의 유의성 있는 억제 효과가 관찰되었다. 형성된 멜라닌세포의 감소 효과 실험에서는 평균치를 기준으로 복강내주사군의 경우 3주 및 6주에 각각 18.3%, 12.5%의 감소 효과가 관찰되었고, 경구투여군에서는 3주 및 6주에 각각 16.9%, 20.4%의 감소 효과가 관찰되었으며, 피부도포군의 경우 3주에 32.0%, 6주에 31.2%의 감소 효과를 보였다. 이상의 결과는 헤모힘이 UV에 의한 멜라닌세포 형성 억제제 및 미백제로서의 적용 가능성을 제시하였다. 구성 단미생약, 유효성분, 멜라닌세포 형성 억제 및 형성된 세포의 감소 촉진에 관여하는 작용 기전에 대한 추가 연구가 필요하다.

Keywords

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