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Poliovirus Tissue and Host Tropism and Its Impact on Neurovirulence   Nusrat Jahan

Poliovirus Tissue and Host Tropism and Its Impact on Neurovirulence

200 страниц. 2012 год.
LAP Lambert Academic Publishing
Using two different approaches, light was shed on the role of some of post-entry determinants in the PV tissue-host tropism. In the first approach, a chimeric virus PV1(RIPO), utilizing the cognate IRES of human rhinovirus type 2 (HRV2) was used to study the potential contribution of the IRES element toward the cell tropism. Experiments were performed to shed light on the mechanism by which this variant expresses its remarkably attenuated phenotype in poliovirus-sensitive CD155 transgenic (tg) mice. The second approach was designed to study the PV tropism in a cell line known as MDCKCD155?, which is a first known example of CD155 expressing mammalian cell line that cannot be infected by wild type PV. The results indicate that once the virus is inside the cell, the IRES driven translation of viral RNA is fully functional but the cells either fail to support or actively prevent the viral RNA replication resulting in nonproductive infection. This work demonstrates that poliovirus tissue...
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