Journal of the Society of Cosmetic Scientists of Korea (대한화장품학회지)

Society of Cosmetic Scientists of Korea (대한화장품학회)
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Whitening and Anti-oxidative Constituents from the Extracts of Hydrangea petiolaris Leaves

등수국 잎 추출물 유래 미백 및 항산화 활성 성분

  • Jo, Seong Mi (Department of Chemistry and Cosmetics, Jeju National University) ;
  • Kim, Jung Eun (Department of Chemistry and Cosmetics, Jeju National University) ;
  • Lee, Nam Ho (Department of Chemistry and Cosmetics, Jeju National University)
  • 조성미 (제주대학교 화학.코스메틱스학과) ;
  • 김정은 (제주대학교 화학.코스메틱스학과) ;
  • 이남호 (제주대학교 화학.코스메틱스학과)
  • Received : 2022.04.21
  • Accepted : 2022.06.17
  • Published : 2022.06.30
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Abstract

In this study, the whitening and antioxidant effects of the extracts from Hydrangea petiolaris (H. petiolaris) leaves was confirmed, and the chemical structure was identified by separating the active ingredients. In the whitening tests using α-MSH stimulated B16F10 melanoma cells, the n-hexane (Hex) fraction inhibited the cellular melanogenesis and intracellular tyrosinase activities without causing cell toxicity. In addition, the Hex fraction reduced expression of tyrosinase and TRP-2 protein. Upon the anti-oxidative studies by DPPH and ABTS+ radicals, potent radical scavenging activities were observed in the ethyl acetate (EtOAc) fraction. Also, for the cellular protective effects on HaCat keratinocytes damaged by H2O2, the EtOAc fraction indicated protective effects against oxidative stress. Eight phytochemicals were isolated from the extract of H. petiolaris leaves; ethyl linoleate (1), ethyl linolenate (2), 1-linoleoyl glycerol (3), 1-linolenoyl glycerol (4), epi-catechin (5), afzelin (6), quercitrin (7), hyperin (8). Among the isolates, the compounds 5 - 8 showed DPPH and ABTS+ radical scavenging activities. The contents of quercitirin, a major isolated in this extract, determined by HPLC analysis were confirmed to be about 31.3 mg/g for the 70% ethanol extract and 169.8 mg/g for the EtOAc fraction. Based on these results, it was suggested that the extract from H. petiolaris leaves could be potentially applicable as whitening and anti-oxidative ingredients in cosmetic formulations.

본 연구에서는 등수국 잎 추출물의 미백 및 항산화 활성을 확인하고 유효성분을 분리하여 화학구조를 동정하였다. B16F10 melanoma 세포를 이용한 미백 활성 실험 결과, n-hexane (Hex) 분획물이 세포독성 없는 농도에서 멜라닌 생성 및 세포 내 tyrosinase 효소의 활성을 억제시키고 있음을 확인하였다. 또한 Hex 분획물이 tyrosinase 및 TRP-2 단백질의 발현을 감소시켰다. 반면, ethyl acetate (EtOAc) 분획물은 DPPH 및 ABTS+ 라디칼 소거 활성이 우수하였고, H2O2로 유도된 세포 손상에 대한 세포보호 효과를 나타내었다. Hex 및 EtOAc 분획물의 활성 성분을 규명하기 위해 컬럼 크로마토그래피를 수행하여 8 개의 화합물을 분리하였다; ethyl linoleate (1), ethyl linolenate (2), 1-linoleoyl glycerol (3), 1-linolenoyl glycerol (4), epi-catechin (5), afzelin (6), quercitrin (7), hyperin (8). 분리된 화합물에 대한 항산화 활성 측정 결과, 화합물 5 - 8의 라디칼 소거 활성이 우수함을 확인하였다. 또한 HPLC 분석을 통해 주성분인 quercitrin (7)의 함량을 측정한 결과, 추출물에서 31.3 mg/g, EtOAc 분획물에서 169.8 mg/g이 함유되어 있는 것으로 확인되었다. 이상의 연구 결과를 바탕으로 등수국 잎은 미백 및 항산화 효과를 갖는 천연 화장품 소재로의 개발이 가능할 것이라 사료된다.

Keywords

Acknowledgement

이 논문은 2021학년도 제주대학교 교원성과지원사업에 의하여 연구되었음.

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