Table of Contents
Hepatitis Research and Treatment
Volume 2016, Article ID 6592143, 9 pages
http://dx.doi.org/10.1155/2016/6592143
Research Article

A Novel Structurally Stable Multiepitope Protein for Detection of HCV

1Laboratório de Biotecnologia de Microrganismos, Universidade Federal de São João Del-Rei, 35501-296 Divinópolis, MG, Brazil
2Departamento de Biologia Celular, Universidade de Brasília, 70910-900 Brasília, DF, Brazil
3Laboratório de Doenças Imunogenéticas e Crônico-degenerativas, Universidade de Brasília, 70910-900 Brasília, DF, Brazil
4Laboratório de Biofísica, Universidade de Brasília, 70910-900 Brasília, DF, Brazil

Received 30 October 2015; Accepted 29 December 2015

Academic Editor: Piero Luigi Almasio

Copyright © 2016 Alexsandro S. Galdino 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

Hepatitis C virus (HCV) has emerged as the major pathogen of liver diseases in recent years leading to worldwide blood-transmitted chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma. Accurate diagnosis for differentiation of hepatitis C from other viruses is thus of pivotal importance for proper treatment. In this work we developed a recombinant multiepitope protein (rMEHCV) for hepatitis C diagnostic purposes based on conserved and immunodominant epitopes from core, NS3, NS4A, NS4B, and NS5 regions of the virus polyprotein of genotypes 1a, 1b, and 3a, the most prevalent genotypes in South America (especially in Brazil). A synthetic gene was designed to encode eight epitopes in tandem separated by a flexible linker and bearing a his-tag at the C-terminal end. The recombinant protein was produced in Escherichia coli and purified in a single affinity chromatographic step with >95% purity. Purified rMEHCV was used to perform an ELISA which showed that the recombinant protein was recognized by IgG and IgM from human serum samples. The structural data obtained by circular dichroism (CD) spectroscopy showed that rMEHCV is a highly thermal stable protein at neutral and alkaline conditions. Together, these results show that rMEHCV should be considered an alternative antigen for hepatitis C diagnosis.