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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 109, No. 6, 2014, pp. 748-756
Bioline Code: oc14110
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 109, No. 6, 2014, pp. 748-756

 en Inflammatory response of endothelial cells to hepatitis C virus recombinant envelope glycoprotein 2 protein exposure
Urbaczek, Ana Carolina; de Abreu Ribeiro, Lívia Carolina; Ximenes, Valdecir Farias; Afonso, Ana; Nogueira, Camila Tita; Generoso, Wesley Cardoso; Alberice, Juliana Vieira; Rudnicki, Martina; Ferrer, Renila; da Fonseca, Luiz Marcos & da Costa, Paulo Inácio

Abstract

The hepatitis C virus (HCV) encodes approximately 10 different structural and non-structural proteins, including the envelope glycoprotein 2 (E2). HCV proteins, especially the envelope proteins, bind to cell receptors and can damage tissues. Endothelial inflammation is the most important determinant of fibrosis progression and, consequently, cirrhosis. The aim of this study was to evaluate and compare the inflammatory response of endothelial cells to two recombinant forms of the HCV E2 protein produced in different expression systems ( Escherichia coli check for this species in other resources and Pichia pastoris check for this species in other resources ). We observed the induction of cell death and the production of nitric oxide, hydrogen peroxide, interleukin-8 and vascular endothelial growth factor A in human umbilical vein endothelial cells (HUVECs) stimulated by the two recombinant E2 proteins. The E2-induced apoptosis of HUVECs was confirmed using the molecular marker PARP. The apoptosis rescue observed when the antioxidant N-acetylcysteine was used suggests that reactive oxygen species are involved in E2-induced apoptosis. We propose that these proteins are involved in the chronic inflammation caused by HCV.

Keywords
HCV; E2 protein; inflammation; HUVEC

 
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