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Updated: Feb 14, 2026

Profiling Individual Human Embryonic Stem Cells by Quantitative RT-PCR
Published on: May 29, 2014
Comparison of two commercial quantitative PCR assays and correlation with the first WHO International Standard for
Ilka Engelmann1, Enagnon Kazali Alidjinou1, Mouna Lazrek1
1Univ Lille, Faculté de Médecine, CHU Lille, Laboratoire de Virologie EA3610, F-59000 Lille, France.
Abstract:
Comparability between CMV assays could be facilitated by the first WHO International Standard for human CMV (standard). Standard dilutions were submitted to nucleic acid extraction with Versant kPCR Molecular systems SP or MagNA Pure LC System followed by the kPCR PLX™ CMV DNA (kPCR) or the CMV R-gene™ assay (R-gene), respectively; 139 clinical specimens were tested. Both assays correlated well with the standard (R2 > 0.96) and a matrix effect was observed. Quantitative results correlated reasonably between both assays for whole blood (R2 = 0.79) and well for other specimen types (R2 = 0.93). Quantification differences were within one log10 of the averaged log10 results for 25/27 blood specimens and for 32/33 other specimens. Calibration to the standard did not increase this percentage. In conclusion, results of both assays showed reasonable correlation with each other and good correlation with the standard. Calibration to the standard did not improve comparability of quantitative results.
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