Related Experiment Videos
Immunological properties of two polypeptides of Mason-Pfizer monkey virus
Abstract:
Two polypeptides were isolated from the Mason-Pfizer monkey virus (MP-MV). The polypeptides, designated MP-MV p26 and MP-MV p15, were 26,000 and 15,000 molecular weight, respectively, based on gel filtration chromatography in the presence of 6 M guanidine hydrochloride. Radioimmunoassays developed for MP-MV p26 and p15 were, respectively, 10 and 100 times more sensitive than immunodiffusion and 1 and 10 times more sensitive than micro-complement fixation for the detection of MP-MV. Antigens of other reverse transcriptase-containing RNA viruses did not cross-react in either MP-MV radioimmunoassay. Further, antisera against these other viruses did not react with the radioiodine-labeled MP-MV polypeptides. The MP-MV radioimmunoassays should be useful in studying the natural occurrence of this virus and its relationship to primate tumors.
Insights
Sensitive radioimmunoassays were developed for Mason-Pfizer monkey virus (MP-MV) polypeptides p26 and p15. These assays offer superior detection of MP-MV, aiding research into primate tumors.
Area of Science:
- Virology
- Immunology
- Biochemistry
Background:
- Mason-Pfizer monkey virus (MP-MV) is a retrovirus.
- Understanding MP-MV's prevalence and association with primate tumors requires sensitive detection methods.
Purpose of the Study:
- To develop and characterize sensitive radioimmunoassays for MP-MV detection.
- To evaluate the specificity of these assays against other retroviruses.
Main Methods:
- Isolation and molecular weight determination of MP-MV polypeptides (p26 and p15) using gel filtration chromatography.
- Development of radioimmunoassays (RIAs) for MP-MV p26 and p15.
- Testing assay sensitivity against immunodiffusion and micro-complement fixation.
- Assessing cross-reactivity with antigens from other reverse transcriptase-containing RNA viruses.
Main Results:
- MP-MV p26 and p15 polypeptides were isolated with molecular weights of 26,000 and 15,000, respectively.
- MP-MV RIAs demonstrated 10-100 times greater sensitivity than immunodiffusion and 1-10 times greater sensitivity than micro-complement fixation.
- No cross-reactivity was observed with antigens from other retroviruses, indicating high specificity.
Conclusions:
- Novel radioimmunoassays provide highly sensitive and specific detection of MP-MV.
- These assays are valuable tools for investigating the natural occurrence of MP-MV.
- The assays will aid in understanding the relationship between MP-MV and primate tumors.