This product is a EGFP encoding oncolytic herpes simplex virus, which is based on HSV-1 with ICP27 deleted. ICP27 is highly cytotoxic probably due to its secondary role of preventing the splicing of pre-mRNAs in favour of translation from the mainly unspliced hepes RNAs. Deletion of ICP27 might produce a safer and less cytotoxic system when combined with other oncolytic-rendered modifications. This product can be used in oncolytic virotherapy research and further recombinant HSV construction.