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Replica-immunogold technique applied to studies on measles virus morphogenesis
Scanning Microscopy
|March 1, 1987
Summary
Measles virus budding relies on cell cytoskeleton and calcium ions. This study used replica techniques to visualize virus assembly and its dependence on cellular structures.
Area of Science:
- Cell Biology
- Virology
- Microscopy
Background:
- Measles virus assembly and release are complex processes.
- Understanding virus morphogenesis is crucial for developing antiviral strategies.
Purpose of the Study:
- To investigate the dynamic process of measles virus budding.
- To elucidate the role of cellular cytoskeleton and calcium ions in virus morphogenesis.
Main Methods:
- Application of the replica technique to infected HeLa cells.
- Labeling with anti-measles antibodies and protein A-gold for virus identification.
- Analysis of platinum carbon surface replicas of cells, cytoskeletons, and isolated plasma membranes.
Main Results:
- Virus budding resembles cellular microvilli formation.
- Budding virus associates with actin filaments in the cytoskeleton.
- Viral nucleocapsids attach to the plasma membrane, but this is disrupted by calcium treatment.
Conclusions:
- Measles virus morphogenesis at the plasma membrane is cytoskeleton-dependent.
- Calcium ions and ionophore A23187 influence viral attachment and antigen distribution.