Related Experiment Videos
Infective substructures of measles virus from acutely and persistently infected cells
Abstract:
Ribonucleoprotein from cells acutely or persistently infected with measles virus were shown to be infectious by the calcium phosphate technique. Very little or no infectivity was obtained when calcium phosphate precipitation was omitted. Electron microscopy showed that the majority of ribonucleoprotein structures isolated from acutely infected cells were folded, whereas those from persistently infected cells were linear in appearance.
Insights
Measles virus ribonucleoprotein complexes are infectious when introduced via calcium phosphate precipitation. The structure of these complexes differs between acute and persistent infections, with folded structures in acute and linear in persistent infections.
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- Measles virus infection can establish acute or persistent cellular states.
- Ribonucleoprotein (RNP) complexes are key components of RNA viruses, including measles virus.
- Understanding the infectivity and structure of viral RNPs is crucial for studying viral replication and pathogenesis.
Purpose of the Study:
- To determine the infectivity of measles virus ribonucleoprotein complexes.
- To investigate the structural differences of RNPs in acutely versus persistently infected cells.
- To assess the role of calcium phosphate precipitation in viral RNP delivery.
Main Methods:
- Isolation of ribonucleoprotein complexes from measles virus-infected cells (both acute and persistent).
- Infectivity assays using the calcium phosphate precipitation technique.
- Electron microscopy for structural analysis of isolated ribonucleoprotein complexes.
Main Results:
- Measles virus ribonucleoprotein complexes demonstrated infectivity when delivered via calcium phosphate precipitation.
- Omitting the calcium phosphate precipitation step resulted in minimal to no infectivity.
- Electron microscopy revealed that RNPs from acutely infected cells were predominantly folded, while those from persistently infected cells were primarily linear.
Conclusions:
- Calcium phosphate precipitation is an effective method for delivering infectious measles virus ribonucleoprotein complexes.
- The structural conformation of measles virus RNPs differs significantly between acute and persistent infections.
- These structural differences may play a role in the distinct cellular states of measles virus infection.