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Isolation of human herpesvirus-6 from clinical specimens using human fibroblast cultures
1Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha.
Abstract:
The isolation and characterization of human herpesvirus-6 (HHV-6) has been hindered by the lack of cell lines useful for its rapid propagation. Recently, we have reported that the MRC-5 cell line (human diploid lung fibroblasts) was susceptible for HHV-6 infection. In this study, we report on the isolation of HHV-6 from the peripheral blood or buffy coat of three chronic fatigue syndrome patients, one post-liver transplant patient, and one severe chronic active Epstein-Barr virus syndrome patient using the MRC-5 cell line. Additionally, it was observed by Southern blot hybridization studies that four of five isolates had different restriction enzyme fragment patterns than the isolate obtained from the National Institutes of Health with Eco RI. These data suggest the usefulness of the MRC-5 cell line in the isolation and characterization of HHV-6 from various patients.
Insights
Researchers isolated human herpesvirus-6 (HHV-6) from patients using the MRC-5 cell line. This method aids in HHV-6 isolation and characterization from diverse clinical samples.
Area of Science:
- Virology
- Immunology
Background:
- Human herpesvirus-6 (HHV-6) isolation and characterization are challenging due to limited propagation cell lines.
- The MRC-5 cell line (human diploid lung fibroblasts) has recently shown susceptibility to HHV-6 infection.
Purpose of the Study:
- To report the successful isolation of HHV-6 from clinical samples using the MRC-5 cell line.
- To assess the utility of the MRC-5 cell line for HHV-6 isolation and characterization.
Main Methods:
- Isolation of HHV-6 from peripheral blood or buffy coat samples.
- Utilized the MRC-5 cell line for viral propagation.
- Southern blot hybridization with restriction enzyme analysis (Eco RI) to compare isolates.
Main Results:
- HHV-6 was successfully isolated from patients with chronic fatigue syndrome, post-liver transplant, and Epstein-Barr virus syndrome.
- Four out of five isolates exhibited distinct restriction enzyme fragment patterns compared to a reference NIH isolate.
- The MRC-5 cell line proved effective for isolating HHV-6 from various patient sample types.
Conclusions:
- The MRC-5 cell line is a valuable tool for the isolation and characterization of HHV-6.
- Distinct genetic variations among HHV-6 isolates were observed.
- This method facilitates further research into HHV-6 pathogenesis and diagnostics.