Abstract: The present invention relates to a modified hTERT promoter for regulating cancer cell-specific gene expression and an oncolytic adenovirus including the same. The modified hTERT promoter of the present invention increases the cancer-specific transcriptional activity of a target gene compared to the case where a wild-type hTERT promoter is used, and when the modified hTERT promoter is used for an oncolytic adenovirus, the tumor-killing effect is excellent compared to the case where an adenovirus is prepared using the wild-type hTERT promoter.

Abstract: The present invention relates to an anti-tumor adenovirus and an anticancer composition comprising same. Double-stranded siRNA of the present invention simultaneously inhibits the expression of a first nucleic acid and a second nucleic acid, thus promoting the death of cancer cells, exhibits more remarkable anticancer activity as compared to co-treatment of respective siRNAs, has a synergistic effect of improving cancer cell death in combined treatment with an anticancer agent. The adenovirus comprising a shRNA-encoding expression cassette expressing the double-stranded siRNA, and a hTERT promoter evades immune responses in the body and is specifically delivered to cancer cells, thus having a systemic therapeutic effect, can be locally delivered, has excellent selectivity, and exhibits a significant anticancer effect even in minimally invasive treatment, and thus, the adenovirus can be effectively used as an anticancer composition or an anticancer adjuvant in various carcinomas.