scholarly journals Evaluation of a new enzyme immunoassay for hepatitis C virus(HCV) core antigen with clinical sensitivity approximating that of genomic amplification of HCV RNA

Hepatology ◽  
2000 ◽  
Vol 32 (2) ◽  
pp. 388-393 ◽  
Author(s):  
Eiji Tanaka ◽  
Chiharu Ohue ◽  
Katsumi Aoyagi ◽  
Kenjiro Yamaguchi ◽  
Shintaro Yagi ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Enzyme Immunoassay ◽  
Core Antigen ◽  
Hcv Rna ◽  
Genomic Amplification ◽  
Clinical Sensitivity ◽  
Hcv Core Antigen

scholarly journals Hepatitis C Virus Core Mutations Reduce the Sensitivity of a Fluorescence Enzyme Immunoassay

2000 ◽  
Vol 38 (9) ◽  
pp. 3450-3452 ◽  
Author(s):  
Hajime Tokita ◽  
Gilbert R. Kaufmann ◽  
Mamoru Matsubayashi ◽  
Isao Okuda ◽  
Tsukasa Tanaka ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Enzyme Immunoassay ◽  
Core Region ◽  
Core Antigen ◽  
Nucleotide Sequencing ◽  
Hcv Rna ◽  
Virus Core ◽  
Hcv Core Antigen ◽  
Rna Levels

Four of 107 samples obtained from hepatitis C virus (HCV) carriers showed lower HCV core antigen levels in a fluorescence enzyme immunoassay (FEIA) than expected from corresponding HCV RNA levels. Nucleotide sequencing revealed a mutation in the HCV core region (Thr49Pro) that appears to have reduced the FEIA sensitivity.

scholarly journals New Automated Hepatitis C Virus (HCV) Core Antigen Assay as an Alternative to Real-Time PCR for HCV RNA Quantification

2010 ◽  
Vol 48 (6) ◽  
pp. 2253-2256 ◽  
Author(s):  
Y. Park ◽  
J.-H. Lee ◽  
B. S. Kim ◽  
D. Y. Kim ◽  
K.-H. Han ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Real Time ◽  
Real Time Pcr ◽  
Core Antigen ◽  
Hcv Rna ◽  
Rna Quantification ◽  
Hcv Core Antigen ◽  
Antigen Assay

scholarly journals Development of a Simple and Highly Sensitive Enzyme Immunoassay for Hepatitis C Virus Core Antigen

1999 ◽  
Vol 37 (6) ◽  
pp. 1802-1808 ◽  
Author(s):  
Katsumi Aoyagi ◽  
Chiharu Ohue ◽  
Kumiko Iida ◽  
Tatsuji Kimura ◽  
Eiji Tanaka ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Molecular Mass ◽  
Enzyme Immunoassay ◽  
Healthy Subjects ◽  
Sodium Dodecyl ◽  
Core Antigen ◽  
Hcv Rna ◽  
Special Device ◽  
Highly Sensitive

A highly sensitive enzyme immunoassay (EIA) for the hepatitis C virus (HCV) core antigen (HCVcAg) was developed, and its performance was compared with that of the AMPLICOR HCV test (Roche Molecular Systems). The developed one-step pretreatment method, 30-min incubation of the specimen with a solution containing three different types of detergents (Triton X-100, 3-[(3-cholamidopropyl)-dimethylammonio]-1-propanesulfonate [CHAPS], and sodium dodecyl sulfate), does not require any special device. Because the interfering anti-core antibody in the sample was sufficiently inactivated by the pretreatment, HCVcAg in the sample could be detected. The immunoreactivity on gel filtration was shifted from void fractions to those corresponding to the molecular mass range from 20 to 25 kDa, which is equal to the estimated molecular mass of HCVcAg, after the pretreatment. By the recovery test with HCVcAg-positive serum, the recovery rate was 93.5 to 106.5%. There was no interference with the EIA by anticoagulants or blood components in the serum. When the cutoff value was tentatively set at 0.5 mU/ml based on the distribution of healthy subjects’ sera, the sera of all healthy subjects (n = 125) and patients with hepatitis B (n = 50) were negative. HCVcAg was detected in sera from 57 of 73 individuals (78.1%) with anti-HCV antibody. Similarly, HCV RNA was detected in sera from 59 individuals (80.8%) with the AMPLICOR HCV as the qualitative test (AMPLICOR HCV test) and in sera from 54 individuals (74.0%) by the AMPLICOR HCV Monitor as the quantitative test (AMPLICOR Monitor test). Concentrations of HCVcAg and HCV RNA (measured by the AMPLICOR Monitor test) correlated significantly (r = 0.8, P < 0.001). On seroconversion panels, HCVcAg was detected during the early stage of infection, when anti-HCV antibodies had not been produced. This assay for HCVcAg is simpler than assays for HCV RNA based on gene technology and shows specificity and sensitivity equivalent to those of the AMPLICOR HCV test.

Diagnostik der Hepatitis C Virus Infektion: Rolle des HCV-Core Antigen Assay

2015 ◽  
Vol 41 (08) ◽  
Author(s):  
HL Tillmann ◽  
J Wiegand ◽  
I Glomb ◽  
A Jelineck ◽  
G Picchio ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Core Antigen ◽  
Hcv Core Antigen ◽  
Antigen Assay
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