Figure 1.
Genomic structure of oncolytic adenoviruses currently used in pre-clinical and clinical studies on high-grade glioma. ITR, inverted terminal repeat. E1AΔ24: a deletion of 24 base pairs within the E1A region. DM: insulator DM-1. E2Fp: E2F-responsive promoter. K: a Kozak sequence. E2F-pal: E2F-responsive palindromes (8 E2F-binding sites). PH20: human sperm PH20 hyaluronidase cDNA. RGD: an RGD integrin-binding motif in the HI loop of the fiber. RGDK: RGDK in the putative heparin sulfate-glycosaminoglycans binding domain KKTK in the fiber shaft. pCMV: the cytomegalovirus promoter. mOX40L: mouse OX40L cDNA. BGH pA: bovine growth hormone poly-adenylation signal. The mOX40L expression cassette replaces the E3 region in Delta-24-RGDOX.