PMID- 23391825 OWN - NLM STAT- MEDLINE DCOM- 20131017 LR - 20130325 IS - 1879-0984 (Electronic) IS - 0166-0934 (Linking) VI - 189 IP - 1 DP - 2013 Apr TI - Calibrated real-time polymerase chain reaction for specific quantitation of HHV-6A and HHV-6B in clinical samples. PG - 172-9 LID - S0166-0934(13)00023-2 [pii] LID - 10.1016/j.jviromet.2013.01.018 [doi] AB - The recent classification of human herpesvirus 6 (HHV-6) A and B, previously considered as two variants of the same virus, as two distinct herpesvirus species, emphasizes the need to develop and standardize specific methods for their detection and quantitation for clinical use. The development of two highly sensitive calibrated real-time PCR to quantify HHV-6A and -6B variants in clinical specimen is described. Both assays displayed the same wide linear dynamic range from 10(0) to 10(6) copies of viral DNA in a single reaction and sensitivity of one copy/reaction. These systems allow for HHV-6A/B DNA load quantitation in different types of clinical specimens: blood or tissue cells when combined with the CCR5 assay; cell-free samples (plasma or other biological fluids) in combination with the calibrator technology. Due to the absence of cross-amplification and cross-hybridization, these methods detect minute amounts of one viral species even in the presence of a large excess of the other, allowing a specific quantitation of both viruses in the case of mixed infections. The new qPCR methods provide sensitive and specific tool for monitoring HHV-6A/B DNA load in clinical samples, facilitating the study of these viruses in human diseases. CI - Copyright (c) 2013 Elsevier B.V. All rights reserved. FAU - Cassina, Giulia AU - Cassina G AD - Unit of Human Virology Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Via Olgettina 58, 20132 Milan, Italy. FAU - Russo, Domenico AU - Russo D FAU - De Battista, Davide AU - De Battista D FAU - Broccolo, Francesco AU - Broccolo F FAU - Lusso, Paolo AU - Lusso P FAU - Malnati, Mauro S AU - Malnati MS LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20130204 PL - Netherlands TA - J Virol Methods JT - Journal of virological methods JID - 8005839 RN - 0 (DNA, Viral) SB - IM MH - Base Sequence MH - DNA, Viral/*analysis/genetics MH - Herpesvirus 6, Human/*classification/genetics/*isolation & purification MH - Humans MH - Real-Time Polymerase Chain Reaction/*methods MH - Roseolovirus Infections/*diagnosis MH - Sequence Alignment MH - Sequence Analysis, DNA MH - Viral Load EDAT- 2013/02/09 06:00 MHDA- 2013/10/18 06:00 CRDT- 2013/02/09 06:00 PHST- 2011/12/05 00:00 [received] PHST- 2013/01/23 00:00 [revised] PHST- 2013/01/28 00:00 [accepted] PHST- 2013/02/09 06:00 [entrez] PHST- 2013/02/09 06:00 [pubmed] PHST- 2013/10/18 06:00 [medline] AID - S0166-0934(13)00023-2 [pii] AID - 10.1016/j.jviromet.2013.01.018 [doi] PST - ppublish SO - J Virol Methods. 2013 Apr;189(1):172-9. doi: 10.1016/j.jviromet.2013.01.018. Epub 2013 Feb 4.