STING1 and cytomegalovirus infection: In HFF cells stably transduced with pLKO.1-STING shRNA, the HCMV titer was increased 4.3-fold (Figure 1A), whereas STING KD exhibited more profound effect on HCMV infection in HUVEC cells (9.9-fold increase in viral titer at 7 days after infection) (Lio et al., 2016).