PMID- 8947879 OWN - NLM STAT- MEDLINE DCOM- 19970227 LR - 20191101 IS - 1352-0504 (Print) IS - 1352-0504 (Linking) VI - 3 IP - 6 DP - 1996 Nov TI - Hepatitis C virus infection and mixed cryoglobulinaemia: assessment of HCV RNA copy numbers in supernatant, cryoprecipitate and non-liver cells. PG - 285-92 AB - The aim of this study was to characterize hepatitis C virus (HCV) infection in patients with mixed cryoglobulinaemia (MC). The HCV RNA copy number was assayed in clinical specimens from 15 consecutive patients with MC and HCV infection. Absolute quantification of HCV RNA molecules was performed using a competitive reverse transcription-polymerase chain reaction (cRT-PCR). Specific HCV RNA sequences were detected and quantified in plasma samples from all patients (mean HCV RNA copy number 4.9 x 10(6) ml-1 plasma). A high concentration of HCV RNA molecules was detected in the cryoprecipitates of eight of the 15 patients, who had a cryoprecipitate/supernatant ratio higher than 3.0 (range 3.60 to 186.80): in the remaining seven patients this ratio was close to or lower than 1.0 (range 0.13 to 1.60). Quantitative analysis of HCV RNA molecules in cells other than hepatocytes (i.e. peripheral blood mononuclear cells (PBMCs) and bone marrow cells (BMCs), in which the HCV replicative intermediate was detected using strand specific RT-PCR, demonstrated that infection is detectable in nearly 60% of these extrahepatic cells. Quantitative analysis of HCV RNA in PBMCs and BMCs revealed low levels of viral nucleic acids. FAU - Manzin, A AU - Manzin A AD - Istituti di Microbiologia e di Clinica Medica, Universita di Ancona, Italy. FAU - Solforosi, L AU - Solforosi L FAU - Candela, M AU - Candela M FAU - Cherubini, G AU - Cherubini G FAU - Piccinini, G AU - Piccinini G FAU - Brugia, M AU - Brugia M FAU - Gabrielli, A AU - Gabrielli A FAU - Clementi, M AU - Clementi M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Viral Hepat JT - Journal of viral hepatitis JID - 9435672 RN - 0 (RNA, Viral) SB - IM MH - Aged MH - Bone Marrow Cells MH - Cryoglobulinemia/*complications MH - Female MH - Gene Dosage MH - Genotype MH - Hepacivirus/*genetics/isolation & purification MH - Hepatitis C/blood/complications/pathology/*virology MH - Humans MH - Leukocytes, Mononuclear/virology MH - Male MH - Middle Aged MH - RNA, Viral/*analysis EDAT- 1996/11/01 00:00 MHDA- 1996/11/01 00:01 CRDT- 1996/11/01 00:00 PHST- 1996/11/01 00:00 [pubmed] PHST- 1996/11/01 00:01 [medline] PHST- 1996/11/01 00:00 [entrez] AID - 10.1111/j.1365-2893.1996.tb00100.x [doi] PST - ppublish SO - J Viral Hepat. 1996 Nov;3(6):285-92. doi: 10.1111/j.1365-2893.1996.tb00100.x.