Key result
Infection with the cytolytic variant of coxsackievirus B2 resulted in a higher proportion of viral RNA (17.0%) compared to the non-cytolytic variant (1.3%) at 48 hours, alongside significant differential expression of host cell transcripts.
Lytic coxsackievirus B2 infection significantly alters host cell transcription and reduces the proportion of human RNA compared to non-lytic infection in rhabdomyosarcoma cells.
Does not support clinical changes in viral myocarditis management; leaves open CVB2 variant roles in human cardiac pathogenesis.
The transcriptomes of cells infected with lytic and non-lytic variants of coxsackievirus B2 Ohio-1 (CVB2O) were analyzed using next generation sequencing. This approach was selected with the purpose of elucidating the effects of lytic and non-lytic viruses on host cell transcription. Total RNA was extracted from infected cells and sequenced. The resulting reads were subsequently mapped against the human and CVB2O genomes. The amount of intracellular RNA was measured, indicating lower proportions of human RNA in the cells infected with the lytic virus compared to the non-lytic virus after 48 hours. This may be explained by reduced activity of the cellular transcription/translation machinery in lytic enteroviral replication due to activities of the enteroviral proteases 2A and/or 3C. Furthermore, differential expression in the cells infected with the two virus variants was identified and a number of transcripts were singled out as possible answers to the question of how the viruses interact with the host cells, resulting in lytic or non-lytic infections.
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Sävneby et al. (2016) studied Coxsackievirus B2 infection in rhabdomyosarcoma cells (n=12). Cytolytic variant vVP1Q164K of Coxsackievirus B2 Ohio-1 vs. Non-cytolytic variant CVB2Owt and mock-infection was evaluated on Proportion of viral to human RNA sequences at 48 hours. Infection with the cytolytic variant of coxsackievirus B2 resulted in a higher proportion of viral RNA (17.0%) compared to the non-cytolytic variant (1.3%) at 48 hours, alongside significant differential expression of host cell transcripts.
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