PMID- 25075478 OWN - NLM STAT- MEDLINE DCOM- 20141023 LR - 20190907 IS - 1678-9849 (Electronic) IS - 0037-8682 (Linking) VI - 47 IP - 3 DP - 2014 May-Jun TI - A complete molecular biology assay for hepatitis C virus detection, quantification and genotyping. PG - 287-94 LID - S0037-86822014000300287 [pii] AB - INTRODUCTION: Molecular biology procedures to detect, genotype and quantify hepatitis C virus (HCV) RNA in clinical samples have been extensively described. Routine commercial methods for each specific purpose (detection, quantification and genotyping) are also available, all of which are typically based on polymerase chain reaction (PCR) targeting the HCV 5' untranslated region (5'UTR). This study was performed to develop and validate a complete serial laboratory assay that combines real-time nested reverse transcription-polymerase chain reaction (RT-PCR) and restriction fragment length polymorphism (RFLP) techniques for the complete molecular analysis of HCV (detection, genotyping and viral load) in clinical samples. METHODS: Published HCV sequences were compared to select specific primers, probe and restriction enzyme sites. An original real-time nested RT-PCR-RFLP assay was then developed and validated to detect, genotype and quantify HCV in plasma samples. RESULTS: The real-time nested RT-PCR data were linear and reproducible for HCV analysis in clinical samples. High correlations (> 0.97) were observed between samples with different viral loads and the corresponding read cycle (Ct - Cycle threshold), and this part of the assay had a wide dynamic range of analysis. Additionally, HCV genotypes 1, 2 and 3 were successfully distinguished using the RFLP method. CONCLUSIONS: A complete serial molecular assay was developed and validated for HCV detection, quantification and genotyping. FAU - Casanova, Yara Silva AU - Casanova YS AD - Laboratorio de Diagnostico Molecular, Programa de Pos-Graduacao em Biologia Celular e Molecular Aplicada a Saude, Universidade Luterana do Brasil, Canoas, RS, Brasil. FAU - Boeira, Thais da Rocha AU - Boeira Tda R AD - Cachoeirinha, Cachoeirinha, RS, Brasil. FAU - Sisti, Elisa AU - Sisti E AD - Laboratorio de Diagnostico Molecular, Programa de Pos-Graduacao em Biologia Celular e Molecular Aplicada a Saude, Universidade Luterana do Brasil, Canoas, RS, Brasil. FAU - Celmer, Alvaro AU - Celmer A AD - Cachoeirinha, Cachoeirinha, RS, Brasil. FAU - Fonseca, Andre Salvador Kazantzi AU - Fonseca AS AD - Cachoeirinha, Cachoeirinha, RS, Brasil. FAU - Ikuta, Nilo AU - Ikuta N AD - Laboratorio de Diagnostico Molecular, Programa de Pos-Graduacao em Biologia Celular e Molecular Aplicada a Saude, Universidade Luterana do Brasil, Canoas, RS, Brasil. FAU - Simon, Daniel AU - Simon D AD - Laboratorio de Diagnostico Molecular, Programa de Pos-Graduacao em Biologia Celular e Molecular Aplicada a Saude, Universidade Luterana do Brasil, Canoas, RS, Brasil. FAU - Lunge, Vagner Ricardo AU - Lunge VR AD - Laboratorio de Diagnostico Molecular, Programa de Pos-Graduacao em Biologia Celular e Molecular Aplicada a Saude, Universidade Luterana do Brasil, Canoas, RS, Brasil. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Brazil TA - Rev Soc Bras Med Trop JT - Revista da Sociedade Brasileira de Medicina Tropical JID - 7507456 RN - 0 (5' Untranslated Regions) RN - 0 (DNA Primers) RN - 0 (RNA, Viral) SB - IM MH - 5' Untranslated Regions/*genetics MH - DNA Primers MH - Genotype MH - Hepacivirus/*genetics/isolation & purification MH - Hepatitis C/*diagnosis MH - Humans MH - Polymorphism, Restriction Fragment Length MH - RNA, Viral/*blood MH - Reverse Transcriptase Polymerase Chain Reaction MH - Sensitivity and Specificity MH - Viral Load EDAT- 2014/07/31 06:00 MHDA- 2014/10/24 06:00 CRDT- 2014/07/31 06:00 PHST- 2014/02/26 00:00 [received] PHST- 2014/06/16 00:00 [accepted] PHST- 2014/07/31 06:00 [entrez] PHST- 2014/07/31 06:00 [pubmed] PHST- 2014/10/24 06:00 [medline] AID - S0037-86822014000300287 [pii] AID - 10.1590/0037-8682-0040-2014 [doi] PST - ppublish SO - Rev Soc Bras Med Trop. 2014 May-Jun;47(3):287-94. doi: 10.1590/0037-8682-0040-2014.