論文

査読有り
2015年11月26日

Brazilian green propolis water extract up-regulates the early expression level of HO-1 and accelerates Nrf2 after UVA irradiation

BMC Complementary and Alternative Medicine
  • Yuichi Saito
  • ,
  • Kazuhiro Tsuruma
  • ,
  • Kenji Ichihara
  • ,
  • Masamitsu Shimazawa
  • ,
  • Hideaki Hara

15
1
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1186/s12906-015-0945-4
出版者・発行元
BioMed Central Ltd.

Background: Exposure to ultraviolet A (UVA) irradiation is the major cause of human skin aging. Suppression of UVA irradiation-induced skin fibroblast cell damage protects the skin against aging. An oxidative stress response transcription factor nuclear factor-(erythroid-derived 2)-related factor 2 (Nrf2) has an important role as a cytoprotective system against oxidative stress in the human skin and other organs. Propolis has been commonly used as a traditional medicine since ancient times. The water extract of propolis (WEP) mainly contains caffeoylquinic acids. In our previous study, we reported that WEP and its major constituents protected immortalized human skin fibroblast cells (NB1-RGB) against UVA irradiation-induced cell death. In this study, we examined the mechanism of WEP-mediated skin protection and the possible involvement of Nrf2/antioxidant response element (ARE) pathways. Methods: Brazilian green propolis was used in the present study (Minas Gerais State, Brazil), Baccharis dracunculifolia is its main source. The Baccharis propolis was extracted with water at 50°C to yield water extract. The NB1-RGB cell cultures were incubated for 23h. After replenishing the medium, WEP or its constituents were added to the cell cultures. After 1h, the cells were exposed to 10J/cm2 of UVA light (365nm UVA light source, CL-1000L UV Closslinkers, Ultraviolet Products Ltd., Cambridge, UK). Heme oxygenase-1 (HO-1) expression levels in NB1-RGB cells were evaluated using western blotting. Nrf2 nuclear translocation changes in NB1-RGB cells were indicated using immunostaining. Results: We demonstrated that WEP pretreatment up-regulated HO-1 expression level after UVA irradiation at earlier time points than vehicle pretreatment did, and three main constituents of WEP showed similar effects. Furthermore, WEP pretreatment also accelerated Nrf2 nuclear translocation after UVA irradiation. Conclusions: Our findings indicated that WEP acts as an early inducer of HO-1 and rapid activator of Nrf2 to protect against UVA-induced oxidative stress.

Web of Science ® 被引用回数 : 18

リンク情報
DOI
https://doi.org/10.1186/s12906-015-0945-4
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/26611539
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000365573600001&DestApp=WOS_CPL
URL
http://link.springer.com/content/pdf/10.1186/s12906-015-0945-4
ID情報
  • DOI : 10.1186/s12906-015-0945-4
  • ISSN : 1472-6882
  • eISSN : 1472-6882
  • PubMed ID : 26611539
  • SCOPUS ID : 84960452447
  • Web of Science ID : WOS:000365573600001

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