two-methods-heterokaryon-formation-to-discover-hcv-restriction

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors

Hepatitis C virus (HCV) is a hepatotropic virus with a host-range restricted to humans and chimpanzees. Although HCV RNA replication has been observed in ...

The Rockefeller University, NY

Hepatitis C virus (HCV) is hepatotropic and only infects humans and chimpanzees. Consequently, an immunocompetent small animal model is lacking. The restricted tropism of HCV likely reflects specific host factor requirements. We investigated if dominant restriction factors expressed in non-liver or non-human cell lines inhibit HCV propagation thus rendering these cells non-permissive. To this end we explored if HCV completes its replication cycle in heterokaryons between human liver cell lines and non-permissive cell lines from human non-liver or mouse liver origin. Despite functional viral pattern recognition pathways and responsiveness to interferon, virus production was observed in all fused cells and was only ablated when cells were treated with exogenous interferon. These results exclude that constitutive or virus-induced expression of dominant restriction factors prevents propagation of HCV in these cell types, which has important implications for HCV tissue and species tropism. In turn, these data strongly advocate transgenic approaches of crucial human HCV cofactors to establish an immunocompetent small animal model.

Article	Year
Molecular biology of the cell\| PubMed ID: 16775006	2006
The Journal of general virology\| PubMed ID: 19088272	2009
Journal of virology\| PubMed ID: 20357091	2010
PLoS pathogens\| PubMed ID: 20617177	2010
Completion of hepatitis C virus replication cycle in heterokaryons excludes dominant restrictions in human non-liver and mouse liver cell lines. PLoS pathogens\| PubMed ID: 21552323	2011
mBio\| PubMed ID: 21610122	2011

Julia Bitzegeio

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