• 한국약용작물학회지
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• 제16권3호
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• pp.192-194
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• 2008

In our previous study, ethylacetate fraction of white ginseng (root of Panax ginseng C.A. Meyer) extract inhibited mushroom tyrosinase activity and melanin production in melanocytes. This study examined its effects on the expression of melanin biosynthesis-related enzymes to explore the depigmenting pathway. Moreover, depigmenting effect on animal skin was examined using UV-B induced hyperpigmented skin of brown guinea pigs. The ethylacetate fraction of the white ginseng extract exhibited depigmenting activity in the skin of brown guinea pig without visible edema. In addition, this fraction reduced tyrosinase expression in melanocytes. The results suggested that ethylacetate fraction of white ginseng extract might be used as skin depigmenting material by inhibition of tyrosinase activity and expression.

• 한방안이비인후피부과학회지
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• 제17권1호
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• pp.94-103
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• 2004

Objective: This study was performed to detennine the depigmenting effects of Kamibongpungtongsung-San. Methods: To determine the depigmenting effects of Kamibangpungtongsung-San. we measured the degree of tyrosinase inhibition, melanin production & cell viability in cultured B16 melanoma cells, UV screen and cytoprotective effects on PC12 cells injured by hydrogen peroxide. Results: Komibangpungtongsung-San did not show inhibitory effects on melanin production in melanoma cells, UV screen and cytoprotective effects on PC12 cells injured by hydrogen peroxide. However it showed mild inhibitory effects on tyrosinase activity. Conclusion : This study shows that Kamibangpungtongsung-San, a generally used prescription for dermatologic diseases, do not have depigmenting effects via tyrosinase inhibition. Therefore, the depigmenting effect and mechanism of depigmentation by Kamibangpungtongsung-San need to be evaluated and investigated in other directions.

• Journal of Microbiology and Biotechnology
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• 제17권10호
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• pp.1585-1590
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• 2007

Although a number of melanogenesis inhibitors have recently been reported and used as cosmetic additives, none is completely satisfactory, leaving a need for novel skin-depigmenting agents. Thus, to develop a novel skin depigmenting agent from natural sources, the inhibition of melanogenesis by Chinese plants was evaluated. A methanolic extract of Nigella glandulifera Freyn was found to inhibit the melanin synthesis of murine B16F10 melanoma cells by 43.7% and exhibited a low cytotoxicity (8.1%) at a concentration of $100\;{\mu}g/ml$. Thus, to identify the melanogenesis-inhibiting mechanism, the inhibitory activity towards tyrosinase, the key enzyme of melanogenesis, was further evaluated, and the results showed inhibitory effects on the activity of intracellular tyrosinase yet not on mushroom tyrosinase. Finally, to isolate the compounds with a hypopigmenting capability, activity-guided isolation was performed, and Dioctyl phthalate identified as inhibiting melanogenesis.

• 대한화장품학회:학술대회논문집
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• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book II
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• pp.174-183
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• 2003

To obtain effective and safe topical depigmenting agents, we synthesized hydroxybenzoates, alkoxybenzoates, and 3,4,5-trimethoxycinnamate containing a thymol moiety and screened then for high-level inhibitory activity against melanin synthesis. Among them, 5-methyl-2-(methylethyl)phenyl (2Ε)-3-(3,4,5-trimethoxyphenyl)prop-2-enoate (Melasolv)$^{TM}$ 4h, showed the most potent depigmenting effect ($IC_{50}$/ = 10$\mu$M) with low cytotoxicity ($IC_{50}$/ = 200$\mu$M). To find the inhibition mechanism of our candidate, various in vitro tests were performed such as DPPH assay, tyrosinase activity in mushroom or in culture cell and expression of tyrosinase, TRP-l and TRP-2. The result of this study suggested that 4h inhibited melanin synthesis by reducing the expression of tyrosinase and TRP-l at the transcriptional level in melan-a melanocytes.s.

• 대한화장품학회지
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• 제35권1호
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• pp.1-9
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• 2009

남아시아 지역은 문화적, 사회적으로 흰 피부에 대한 관심이 높으며 이로 인해 미백화장품에 대한 요구가 크다. 합성물에 대한 우려 및 거부감으로 천연물중심의 원료가 급증하고 있다. 본 논문에서는 인도를 포함하는 남아시아 지역의 미백소재에 관한 문화, 사회적 배경과 최근 연구 개발 현황을 조사하였다.

• Bulletin of the Korean Chemical Society
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• 제33권4호
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• pp.1333-1336
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• 2012

• 한국약용작물학회지
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• 제15권6호
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• pp.434-436
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• 2007

멜라닌 생합성은 tyrosinase의 작용으로 인한 tyrosine의 산화로부터 시작되어 dopaquinone 및 dopachrome가 생성되고 dopachrome는 다시 dihydroxyindole과 dopachrome tautomerase에 의한 dihydroxyindole-2-carboxylic acid 로 전환되는 과정을 거쳐 진행된다 (Alaluf et al.; 2001). 도깨비 부채 뿌리 추출물의 멜라닌 생합성 저해 기전을 검정하기 위하여 melan-a 세포에서의 tyrosinase 및 TRP-2 발현량을 western immunoblotting하여 측정한 결과 도깨비 부채 뿌리 추출물은 TRP-2 발현량에는 영향을 미치지 않으나 tyrosinase의 발현량을 현저히 감소시킴을 확인 할 수 있었고 따라서 이전의 연구와 종합하여 볼 때 도깨비 부채 뿌리 추출물은 멜라닌 생합성의 초기에 주요한 역할을 하는 tyrosinase의 활성 및 발현을 모두 억제함으로써 멜라닌 생성을 감소시키는 것으로 사료된다. 또한 도깨비 부채 뿌리 추출물은 brown guinea pig 피부에서 3% 농도로 도포 시 발적이나 이상 징후를 일으키지 않고 자외선으로 유도된 색소 침착을 감소 시켜 피부 미백 용도의 기능성 원료로써 큰 가능성을 가지고 있는 것으로 판단된다.

• 동의생리병리학회지
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• 제19권3호
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• pp.662-670
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• 2005

Recently many efforts were focused to understand the mechanical insights of melanogenesis to develop the agents for hyper-pigmentation and hypo-pigmentation. In the melanin bio-synthetic pathway, tyrosinase is the rate limiting enzyme, and ${\alpha}$-melanocyte stimulating hormone(MSH) stimulates melanogenesis and enhances the melanin synthesis and the tyrosinase activity. The author has analyzed the effects of Biota Orientalis Folium on the basal melanogenic activities of B16 mouse melanoma cells, and on the ${\alpha}$-MSH or tyrosinase-induced melanogenesis. Biota Orientalis Folium alone markedly suppressed melanin content and tyrosinase activity in a dose-dependent manner. The decrease of cell propagation was observed in B16 cells treated with 200${\mu}$g/ml dose of Biota Orientalis Folium, indicating that Biota Orientalis Folium-induced depigmenting effect was caused by inhibition of melanin synthesis, not due to destruction of B16 cells. Pretreatment of the cells with Biota Orientalis Folium also suppressed the increase of ${\alpha}$-MSH (10 nM) induced melanin content and tyrosinase activity. Biota Orientalis Folium inhibited the revelation of ${\alpha}$-MSH induced tyrosinase protein and tyrosinase related protein and mRNA of tyrosinase in B16 melanoma cell. These results suggest that Biota Orientalis Folium inhibits melanogenesis and abrogates ${\alpha}$-MSH and tyrosinase-induced melanogenesis in B16 melanoma cells.

• Bulletin of the Korean Chemical Society
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• 제31권8호
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• pp.2375-2378
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• 2010

• Bulletin of the Korean Chemical Society
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• 제35권12호
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• pp.3647-3650
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• 2014