“…NIS has been exploited as a marker gene for cancer gene therapy. 21, 22, 23, 24 Several oncolytic viruses have been equipped with a NIS gene to facilitate noninvasive in vivo monitoring 25, 26, 27, 28, 29, 30 and potency enhancement by adding I-131 ( 131 I). 20, 21, 23, 26, 30, 31 In this paper, we report a novel NIS-expressing oHSV whose viral dynamics are not altered by the NIS transgene.…”