Universität zu Köln

Wiesmann, F., Naeth, G., Sarrazin, C., Berger, A., Kaiser, R., Ehret, R., Knechten, H. and Braun, P. (2015). Variation analysis of six HCV viral load assays using low viremic HCV samples in the range of the clinical decision points for HCV protease inhibitors. Med. Microbiol. Immunol., 204 (4). S. 515 - 526. NEW YORK: SPRINGER. ISSN 1432-1831

Full text not available from this repository.

Abstract

In the range of clinical decision points for response-guided therapy of HCV, there is still insufficient data concerning the conformity of quantification results obtained by different assays and their correlation with the HPS/CTM v2 assay which was used for initial clinical studies. In a head-to-head comparison, assay accuracy and detection rates of six quantitative assays [artus HCV QS-RGQ, COBAS Ampliprep/COBAS TaqMan HCV v1/v2, High Pure System/COBAS TaqMan (HPS), RealTime HCV, and Versant HCV1.0] were assessed by measuring WHO and PEI standards at dilution steps near clinical decision points. Detection rates and mean differences between assays were evaluated by analyzing twenty clinical samples at 10, 100, and 1,000 IU/mL. Ten replicates from specimens with different HCV genotypes were used to analyze pan-genotypic intra-assay variation. At <= 25 IU/mL, RealTime demonstrated the highest detection rates. With 0.1 log difference when testing clinical samples, results obtained from the Versant and RealTime assays matched best with results from HPS. Mean difference analysis across all assay results revealed wide differences between 0.01 and 0.75 log IU/mL. RealTime showed the lowest intra-assay variation across genotypes 1-4 (25, 100, 1,000 IU/mL). There are substantial analytical differences between viral load assays clinicians should be aware of. These variations may have impact on clinical decisions for patients on HCV triple therapy and may argue for assay-specific decision points equivalent to reference values established in studies using HPS. A comparison of quantification is recommended prior to a switch of assays during ongoing therapy.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wiesmann, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Naeth, G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sarrazin, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Berger, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kaiser, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ehret, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Knechten, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braun, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-397641
DOI:	10.1007/s00430-014-0364-z
Journal or Publication Title:	Med. Microbiol. Immunol.
Volume:	204
Number:	4
Page Range:	S. 515 - 526
Date:	2015
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-1831
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CHRONIC HEPATITIS-C; REAL-TIME PCR; ALPHA-2A (40 KD)/RIBAVIRIN; VIRUS-RNA; ABBOTT REALTIME; INTERNATIONAL STANDARD; TRIPLE THERAPY; PLUS RIBAVIRIN; QUANTIFICATION; TELAPREVIR Multiple languages Immunology; Microbiology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/39764