Inflammatory response of endothelial cells to hepatitis C virus recombinant envelope glycoprotein 2 protein exposure
Mem. Inst. Oswaldo Cruz
; 109(6): 748-756, 09/09/2014. graf
Article
in En
| LILACS
| ID: lil-723994
Responsible library:
BR1.1
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 and Pichia pastoris). 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.
Key words
Full text:
1
Collection:
01-internacional
Database:
LILACS
Main subject:
Viral Envelope Proteins
/
Tumor Necrosis Factor-alpha
/
Hepacivirus
/
Human Umbilical Vein Endothelial Cells
/
Nitric Oxide
Limits:
Humans
Language:
En
Journal:
Mem Inst Oswaldo Cruz
/
Mem. Inst. Oswaldo Cruz
/
Mem. Inst. Oswaldo Cruz (Online)
/
Memórias do Instituto Oswaldo Cruz (Impresso)
/
Proceedings of the Instituto Oswaldo Cruz
Journal subject:
MEDICINA TROPICAL
/
PARASITOLOGIA
Year:
2014
Document type:
Article
/
Project document
Affiliation country:
Brazil
Country of publication:
Brazil