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Recombinant streptavidin fusion proteins as signal reporters in rapid test of human hepatitis C virus infection.

ABSTRACT: BACKGROUND:Early diagnosis of hepatitis C virus (HCV) infection is very important for the treatment of the disease. Development of sensitive and specific rapid detection assays is of great significance for the diagnosis. Here, we describe a promising method of using gold-labeled streptavidin fusion proteins as novel signal reporter in a rapid detection assay for HCV infection. METHODS:Recombinant genes encoding streptavidin fused with Escherichia coli maltose-binding protein (MBP) or with a portion of bacterial translational initiation factor 2 were cloned in expression vectors pMAL-5CX and pET28 and transformed in proper Escherichia coli host strains. The genes were induced and streptavidin fusion proteins, named M-STV and IF-STV, respectively, were purified by affinity chromatography to over 90% purity. The biotin-binding activity of M-STV and IF-STV was tested by enzyme-linked immunosorbent assay (ELISA). M-STV was labeled with colloidal gold nanoparticles and used as a signal reporter to develop a lateral flow-based rapid test for detecting anti-HCV antibodies in human blood samples. RESULTS:M-STV showed slightly higher biotin-binding activity and similar binding specificity as compared to commercial streptavidin. The gold-labeled M-STV bound specifically to biotin moieties immobilized on the rapid test strips in a dose-responsive manner and was successfully used in detecting HCV antibodies in serum samples of patients infected with HCV. The rapid test displayed higher detection sensitivity than gold-labeled commercial NeutrAvidin. CONCLUSION:Our results indicate that gold-labeled M-STV is a promising agent in rapid tests of HCV infection and possibly other viral infections.

SUBMITTER: Zhou S

PROVIDER: S-EPMC6818559 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature

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Recombinant streptavidin fusion proteins as signal reporters in rapid test of human hepatitis C virus infection.

Zhou Shengliang S Cao Shinian S Ma Guoliang G Ding Tielin T Mu Jingjing J Han Weilu W Sun Dongxu D Chen Caifa C

Journal of clinical laboratory analysis 20181023 3

<h4>Background</h4>Early diagnosis of hepatitis C virus (HCV) infection is very important for the treatment of the disease. Development of sensitive and specific rapid detection assays is of great significance for the diagnosis. Here, we describe a promising method of using gold-labeled streptavidin fusion proteins as novel signal reporter in a rapid detection assay for HCV infection.<h4>Methods</h4>Recombinant genes encoding streptavidin fused with Escherichia coli maltose-binding protein (MBP) ...[more]

PMID: 30350885

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Recombinant streptavidin fusion proteins as signal reporters in rapid test of human hepatitis C virus infection.

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Recombinant streptavidin fusion proteins as signal reporters in rapid test of human hepatitis C virus infection.

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