XXXX receptor alpha and caveolae are not required for Ebola virus glycoprotein-mediated viral infection.

@entity1501 @entity2598 @entity5742 @entity5689
@entity1501 receptor alpha ( @entity5742 ) has been described as a factor involved in mediating Ebola virus entry into cells (6). Furthermore, it was suggested that interaction with @entity5742 results in internalization and subsequent viral ingress into the cytoplasm via caveolae (9). Descriptions of cellular receptors for Ebola virus and its entry mechanisms are of fundamental importance, particularly with the advent of vectors bearing Ebola virus glycoprotein (GP) being utilized for gene transfer into cell types such as airway epithelial cells. Thus, the ability of @entity5742 to mediate efficient entry of viral pseudotypes carrying GP was investigated. We identified cell lines and primary cell types such as macrophages that were readily infected by GP pseudotypes despite lacking detectable surface @entity5742 , indicating that this receptor is not essential for @entity2598 . Furthermore, we find that T-cell lines stably expressing @entity5742 are not infectible, suggesting that @entity5742 is also not sufficient to mediate entry. T-cell lines lack caveolae, the predominant route of @entity5742 -mediated @entity1501 metabolism. However, the coexpression of @entity5742 with @entity5689 , the major structural protein of caveolae, was not able to rescue infectivity in a T-cell line. In addition, other cell types lacking caveolae are fully infectible by GP pseudotypes. Finally, a panel of ligands to and soluble analogues of @entity5742 were unable to inhibit infection on a range of cell lines, questioning the role of @entity5742 as an important factor for Ebola virus entry.
