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Modification and exploitation of a poliovirus-induced membrane complex by superinfecting ME virus
Abstract:
The replication of Mouse Elberfeld (ME) virus was accelerated when HEp-2 cells were mixedly infected with poliovirus in the presence of guanidine. The latent period of the replication of ME virus was shortened by 3 h when cells were preinfected for at least 2 h with poliovirus and inhibited by guanidine. Simultaneous infection with poliovirus and ME virus resulted in a shortening by 1 h of the latent period of ME virus replication. The accelerated replication of ME virus was shown to be due to modification and exploitation of a membrane complex induced by poliovirus in the presence of guanidine; on superinfection ME virus successively modified this poliovirus-induced complex of 470S ("light' complex) into a "heavy' complex of 700S specific for ME virus.
Insights
Mouse Elberfeld virus (ME) replication speeds up when HEp-2 cells are co-infected with poliovirus and guanidine. Poliovirus pre-infection significantly shortens ME virus latent periods by exploiting a poliovirus-induced membrane complex.
Area of Science:
- Virology
- Cell Biology
- Molecular Virology
Background:
- Poliovirus infection induces specific cellular changes in HEp-2 cells.
- Guanidine is known to inhibit viral replication but can also induce specific cellular responses.
- Understanding viral interactions and replication mechanisms is crucial in virology.
Purpose of the Study:
- To investigate the effect of poliovirus co-infection on Mouse Elberfeld (ME) virus replication.
- To determine the role of guanidine in modulating viral interactions and replication.
- To elucidate the mechanism by which poliovirus influences ME virus replication.
Main Methods:
- HEp-2 cells were infected with poliovirus and/or Mouse Elberfeld (ME) virus in the presence of guanidine.
- Latent periods of ME virus replication were measured under different infection conditions.
- Analysis of viral-induced membrane complexes using sedimentation assays (470S and 700S complexes).
Main Results:
- ME virus replication was accelerated in HEp-2 cells co-infected with poliovirus and guanidine.
- Pre-infection with poliovirus shortened the latent period of ME virus replication by up to 3 hours.
- ME virus modified a poliovirus-induced membrane complex (470S) into a ME virus-specific complex (700S).
Conclusions:
- Poliovirus infection, particularly in the presence of guanidine, enhances ME virus replication.
- ME virus exploits and modifies poliovirus-induced cellular structures for its own replication.
- This study reveals a novel mechanism of viral interference and exploitation at the molecular level.