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Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region

BACKGROUND: The E2 glycoprotein is an important encoded hepatitis C virus (HCV) protein that contains three different variable regions. OBJECTIVES: The aim of the present study was to construct an HCV 1a/JFH1 chimeric virus by replacing the intergenotypic variable region (igVR) fragment of the highl...

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Autores principales: Ghasemi, Faezeh, Ghayour-Mobarhan, Majid, Pasdar, Alireza, Pourianfar, Hamid, Reza Aghasadeghi, Mohammad, Gouklani, Hamed, Meshkat, Zahra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Kowsar 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5111421/
https://www.ncbi.nlm.nih.gov/pubmed/27882063
http://dx.doi.org/10.5812/hepatmon.38261
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author Ghasemi, Faezeh
Ghayour-Mobarhan, Majid
Pasdar, Alireza
Pourianfar, Hamid
Reza Aghasadeghi, Mohammad
Gouklani, Hamed
Meshkat, Zahra
author_facet Ghasemi, Faezeh
Ghayour-Mobarhan, Majid
Pasdar, Alireza
Pourianfar, Hamid
Reza Aghasadeghi, Mohammad
Gouklani, Hamed
Meshkat, Zahra
author_sort Ghasemi, Faezeh
collection PubMed
description BACKGROUND: The E2 glycoprotein is an important encoded hepatitis C virus (HCV) protein that contains three different variable regions. OBJECTIVES: The aim of the present study was to construct an HCV 1a/JFH1 chimeric virus by replacing the intergenotypic variable region (igVR) fragment of the highly variable region of the E2 gene of the Japanese Fulminant hepatitis genotype 2a JFH1 virus with a similar region of HCV genotype 1a. This chimera was produced as a model virus with the ability to be cultured. We analyzed the adapted virus and the variations of nucleic acids within it. METHODS: Specific primers were designed for the igVR of HCV genotype 1a followed by the overlap-PCR method for the synthesis of the desired DNA fragment. The amplified igVR-1a chimera gene and pFL-J6/JFH were digested by KpnI and BsiWI restriction enzymes, and the fragment was ligated into pFL-J6/JFH. The recombinant vector was transformed into Escherichia coli JM109 strain competent cells. All clones were confirmed by colony PCR using specific primers, and the confirmed recombinant vector was sequenced. The recombinant vector was targeted for RNA synthesis by T7 RNA polymerase enzyme. RNA transfection was performed in the Huh7.5 cell line. Virus production in several passages and the evaluated viral load were studied using quantitative real-time PCR and ELISA methods. After 30 passages, the RNA virus was extracted and cloned in PCDNA3.1 vector, and was then sequenced RESULTS: Quantitative real-time PCR results showed 11,292,514 copies/mL of chimeric virus production in cell culture. The virus production was confirmed using ELISA, which showed a virus core production of 808.2 pg/mL. The results of cloning and sequencing showed that some of the nucleic acids in the chimera virus were changed, affecting the viral behavior in the cell culture. CONCLUSIONS: Real-time PCR and ELISA showed high levels of production of 1a/JFH1 chimeric HCV in the Huh7.5 cell culture. The constructed virus can be used for future studies, including the development of new HCV drugs and vaccines.
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spelling pubmed-51114212016-11-23 Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region Ghasemi, Faezeh Ghayour-Mobarhan, Majid Pasdar, Alireza Pourianfar, Hamid Reza Aghasadeghi, Mohammad Gouklani, Hamed Meshkat, Zahra Hepat Mon Research Article BACKGROUND: The E2 glycoprotein is an important encoded hepatitis C virus (HCV) protein that contains three different variable regions. OBJECTIVES: The aim of the present study was to construct an HCV 1a/JFH1 chimeric virus by replacing the intergenotypic variable region (igVR) fragment of the highly variable region of the E2 gene of the Japanese Fulminant hepatitis genotype 2a JFH1 virus with a similar region of HCV genotype 1a. This chimera was produced as a model virus with the ability to be cultured. We analyzed the adapted virus and the variations of nucleic acids within it. METHODS: Specific primers were designed for the igVR of HCV genotype 1a followed by the overlap-PCR method for the synthesis of the desired DNA fragment. The amplified igVR-1a chimera gene and pFL-J6/JFH were digested by KpnI and BsiWI restriction enzymes, and the fragment was ligated into pFL-J6/JFH. The recombinant vector was transformed into Escherichia coli JM109 strain competent cells. All clones were confirmed by colony PCR using specific primers, and the confirmed recombinant vector was sequenced. The recombinant vector was targeted for RNA synthesis by T7 RNA polymerase enzyme. RNA transfection was performed in the Huh7.5 cell line. Virus production in several passages and the evaluated viral load were studied using quantitative real-time PCR and ELISA methods. After 30 passages, the RNA virus was extracted and cloned in PCDNA3.1 vector, and was then sequenced RESULTS: Quantitative real-time PCR results showed 11,292,514 copies/mL of chimeric virus production in cell culture. The virus production was confirmed using ELISA, which showed a virus core production of 808.2 pg/mL. The results of cloning and sequencing showed that some of the nucleic acids in the chimera virus were changed, affecting the viral behavior in the cell culture. CONCLUSIONS: Real-time PCR and ELISA showed high levels of production of 1a/JFH1 chimeric HCV in the Huh7.5 cell culture. The constructed virus can be used for future studies, including the development of new HCV drugs and vaccines. Kowsar 2016-08-07 /pmc/articles/PMC5111421/ /pubmed/27882063 http://dx.doi.org/10.5812/hepatmon.38261 Text en Copyright © 2016, Kowsar Corp http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.
spellingShingle Research Article
Ghasemi, Faezeh
Ghayour-Mobarhan, Majid
Pasdar, Alireza
Pourianfar, Hamid
Reza Aghasadeghi, Mohammad
Gouklani, Hamed
Meshkat, Zahra
Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title_full Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title_fullStr Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title_full_unstemmed Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title_short Design, Construction and Evaluation of 1a/JFH1 HCV Chimera by Replacing the Intergenotypic Variable Region
title_sort design, construction and evaluation of 1a/jfh1 hcv chimera by replacing the intergenotypic variable region
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5111421/
https://www.ncbi.nlm.nih.gov/pubmed/27882063
http://dx.doi.org/10.5812/hepatmon.38261
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