title: A new oncolytic adenoviral vector carrying dual tumour suppressor genes shows potent anti-tumour effect.
abstract: Cancer Targeting Gene-Viro-Therapy (CTGVT) is a promising cancer therapeutical strategy that strengthens the anti-tumour effect of oncolytic virus by expressing inserted foreign anti-tumour genes. In this work, we constructed a novel adenoviral vector controlled by the tumour-specific survivin promoter on the basis of the ZD55 vector, which is an E1B55KD gene deleted vector we previously constructed. Compared with the original ZD55 vector, this new adenoviral vector (ZD55SP/E1A) showed much better ability of replication and reporter gene expression. We then combined anti-tumour gene interleukine-24 (IL-24) with an RNA polymerase III-dependent U6 promoter driving short hairpin RNA (shRNA) that targets M-phase phosphoprotein 1 (MPHOSPH1, a newly identified oncogene) by inserting the IL-24 and the shRNA of MPHOSPH1 (shMPP1) expression cassettes into the new ZD55SP/E1A vector. Our results demonstrated excellent anti-tumour effect of ZD55SP/E1A-IL-24-shMPP1 in vitro on multiple cancer cell lines such as lung cancer, liver cancer and ovarian caner. At high multiplicity-of-infection (MOI), ZD55SP/E1A-IL-24-shMPP1 triggered post-mitotic apoptosis in cancer cells by inducing prolonged mitotic arrest; while at low MOI, senescence was induced. More importantly, ZD55SP/E1A-IL-24-shMPP1 also showed excellent anti-tumour effects in vivo on SW620 xenograft nude mice. In conclusion, our strategy of constructing an IL-24 and shMPP1 dual gene expressing oncolytic adenoviral vector, which is regulated by the survivin promoter and E1B55KD deletion, could be a promising method of cancer gene therapy.
authors.affiliation: Laboratory of Molecular Cell Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
authors.forename: Xin-Ran
authors.initials: XR
authors.lastname: Liu
authors.forename: Ying
authors.initials: Y
authors.lastname: Cai
authors.forename: Xin
authors.initials: X
authors.lastname: Cao
authors.forename: Rui-Cheng
authors.initials: RC
authors.lastname: Wei
authors.forename: Hui-Ling
authors.initials: HL
authors.lastname: Li
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Zhou
authors.forename: Kang-Jian
authors.initials: KJ
authors.lastname: Zhang
authors.forename: Shuai
authors.initials: S
authors.lastname: Wu
authors.forename: Qi-Jun
authors.initials: QJ
authors.lastname: Qian
authors.forename: Biao
authors.initials: B
authors.lastname: Cheng
authors.forename: Kun
authors.initials: K
authors.lastname: Huang
authors.forename: Xin-Yuan
authors.initials: XY
authors.lastname: Liu
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D000818:Animals; D017209:Apoptosis; D045744:Cell Line, Tumor; D005260:Female; D017353:Gene Deletion; D005786:Gene Expression Regulation; D016147:Genes, Tumor Suppressor; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000235:genetics / Q000378:metabolism; D007378:Interleukins / Q000235:genetics / Q000378:metabolism; D008113:Liver Neoplasms / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D050504:Oncolytic Viruses / Q000235:genetics*; D010051:Ovarian Neoplasms / Q000473:pathology; D034741:RNA, Small Interfering / Q000235:genetics; D012097:Repressor Proteins; D000077022:Survivin; D023041:Xenograft Model Antitumor Assays; D000099180:Interleukin-24
chemical_list: D051034:Inhibitor of Apoptosis Proteins; D007378:Interleukins; D034741:RNA, Small Interfering; D012097:Repressor Proteins; D000077022:Survivin; D000099180:Interleukin-24; C117749:Birc5 protein, mouse