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Molecular studies of HHV-6
S F Josephs1, D V Ablashi, S Z Salahuddin
1Laboratory of Tumor Cell Biology, National Cancer Institute, Bethesda, Maryland 20892.
Journal of Virological Methods
|September 1, 1988
Summary
This study presents methods for purifying human herpesvirus 6 (HHV-6) virions and DNA. Researchers characterized the HHV-6 genome size and identified major antigenic viral proteins.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- Human herpesvirus 6 (HHV-6) is a significant human pathogen.
- Understanding HHV-6 virion structure and genome is crucial for developing antiviral strategies.
Purpose of the Study:
- To develop and present methods for the large-scale purification of enveloped HHV-6 virions.
- To characterize the physical properties of the HHV-6 genome.
- To identify major antigenic viral proteins of HHV-6.
Main Methods:
- Large-scale purification of enveloped HHV-6 using continuous flow centrifugation, sucrose gradients, DNase I treatment, and Dextran T10 gradients.
- Restriction enzyme analysis to assess genome size and structure.
- High-resolution two-dimensional polyacrylamide gel electrophoresis (HR2D PAGE) and Western blot analysis for protein identification.
- Radioimmunoprecipitation assay (RIPA) to detect viral proteins recognized by patient antibodies.
Main Results:
- Successfully purified enveloped HHV-6 virions on a large scale.
- Estimated HHV-6 genome size at approximately 170,000 base pairs, with no evidence of inversions.
- Observed restriction enzyme site pleomorphism between different HHV-6 isolates (HHV-6GS and HHV-6Z29).
- Identified major antigenic viral proteins at molecular weights of 200, 120, 80, 72, 30, and 19 kDa.
Conclusions:
- Established effective methods for purifying HHV-6 virions and DNA, facilitating further research.
- Provided insights into the HHV-6 genome structure and variability.
- Identified key antigenic proteins of HHV-6, important for serological studies and vaccine development.