PDGFRA and infection: Silencing of PDGFR-α strongly reduced infections of HFF with cell-free wt TB40 or TB40-UL131Astop viruses, but not infection with TB40-ΔgO virus (Fig 5c and 5d) which confirmed our inhibition experiments using recombinant PDGFR-α or PDGFR-α ligand to block infection.