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Evidence-Based Complementary and Alternative Medicine
Volume 2015, Article ID 187575, 11 pages
http://dx.doi.org/10.1155/2015/187575
Research Article

ERK1/2 and HIF1α Are Involved in Antiangiogenic Effect of Polyphenols-Enriched Fraction from Chilean Propolis

1Center of Molecular Biology and Pharmacogenetics, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Avenida Francisco Salazar 01145, 4781218 Temuco, Chile
2Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, Avenida Professor Lineu Prestes 580, 05508-000 São Paulo, SP, Brazil
3Departamento de Ciencias Preclínicas, Facultad de Medicina, Universidad de La Frontera, Claro Solar 115, 4781218 Temuco, Chile

Received 27 April 2015; Accepted 21 July 2015

Academic Editor: Hyunsu Bae

Copyright © 2015 Alejandro Cuevas et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Propolis has been shown to modulate the angiogenesis in both in vitro and in vivo models. Thus, we aimed to evaluate the antiangiogenic properties of an ethanolic extract of Chilean propolis (EEP) and Pinocembrin (Pn). Migration, formation of capillary-like structures of endothelial cells, and sprouting from rat aortic rings were used to assess the antiangiogenic properties of EEP or Pn. In addition, microRNAs and VEGFA mRNA expression were studied by qPCR. ERK1/2 phosphorylation and HIF1α stabilization were assessed by western blot. EEP or Pn attenuated the migration, the capillary-like tube formation, and the sprouting in the in vitro assays. In addition, the activation of HIF1α and ERK1/2 and the VEGFA mRNA expression was significantly inhibited in a dose-dependent manner. In summary, these results suggest that HIF1α and ERK1/2 phosphorylation could be involved in the antiangiogenic effect of Chilean propolis, but more studies are needed to corroborate these findings.