Immunological characterization of type-D retrovirus isolates from human cells
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Abstract:
Competition radioimmunoassays for the 27,000 molecular weight(p27) major internal protein and the low-molecular-weight 10,000-12,000 (p10-12) polypeptides of the primate type-D retroviruses, Mason-Pfizer virus(MPV) and langur virus (LV), were established. Type-D isolates from various primate and human tumor cells were examined in both these assays. There were no detectable immunological differences between MPV and two type-D retroviruses previously reported to be isolated from human cell lines (HeLa and AO). Type-D retroviruses isolated from human T9 and J96 cells (cell lines derived from human leukemic cells), however, were clearly distinguishable from both MPV and LV in their respective p10-12 radioimmunoassays. These assays thus demonstrate that type-D retroviruses isolated from some human cells may differ immunologically from morphologically similar viruses isolated from nonhuman primates.
Insights
New radioimmunoassays distinguish primate type-D retroviruses. Some human-derived type-D retroviruses show distinct immunological profiles compared to nonhuman primate isolates, highlighting viral diversity.
Area of Science:
- Virology
- Immunology
- Molecular Biology
Background:
- Primate type-D retroviruses are a group of viruses that infect primates.
- Understanding the immunological diversity of these viruses is crucial for disease research.
Purpose of the Study:
- To establish competition radioimmunoassays for key proteins of primate type-D retroviruses.
- To investigate the immunological relationships between type-D retroviruses isolated from primate and human cells.
Main Methods:
- Development of competition radioimmunoassays targeting the p27 major internal protein and p10-12 polypeptides.
- Analysis of type-D retrovirus isolates from various primate and human tumor cell lines using established assays.
Main Results:
- No significant immunological differences were detected between Mason-Pfizer virus (MPV) and type-D retroviruses from HeLa and AO human cell lines.
- Type-D retroviruses from human T9 and J96 leukemic cell lines exhibited distinct immunological profiles in p10-12 assays compared to MPV and langur virus (LV).
Conclusions:
- The developed radioimmunoassays are effective in differentiating type-D retroviruses.
- Immunological heterogeneity exists among type-D retroviruses, with some human isolates differing from nonhuman primate counterparts.