PMID- 26459571 OWN - NLM STAT- MEDLINE DCOM- 20160907 LR - 20211203 IS - 1791-2423 (Electronic) IS - 1019-6439 (Linking) VI - 47 IP - 6 DP - 2015 Dec TI - Combined antitumor gene therapy with herpes simplex virus-thymidine kinase and short hairpin RNA specific for mammalian target of rapamycin. PG - 2233-9 LID - 10.3892/ijo.2015.3194 [doi] AB - A proof-of-concept study is presented using dual gene therapy that employed a small hairpin RNA (shRNA) specific for mammalian target of rapamycin (mTOR) and a herpes simplex virus-thymidine kinase (HSV-TK) gene to inhibit the growth of tumors. Recombinant adeno-associated virus (rAAV) vectors containing a mutant TK gene (sc39TK) were transduced into HeLa cells, and the prodrug ganciclovir (GCV) was administered to establish a suicide gene-therapy strategy. Additionally, rAAV vectors expressing an mTOR-targeted shRNA were employed to suppress mTOR-dependent tumor growth. GCV selectively induced death in tumor cells expressing TK, and the mTOR-targeted shRNA altered the cell cycle to impair tumor growth. Combining the TK-GCV system with mTOR inhibition suppressed tumor growth to a greater extent than that achieved with either treatment alone. Furthermore, HSV-TK expression and mTOR inhibition did not mutually interfere with each other. In conclusion, gene therapy that combines the TK-GCV system and mTOR inhibition shows promise as a novel strategy for cancer therapy. FAU - Woo, Ha-Na AU - Woo HN AD - Department of Microbiology, University of Ulsan College of Medicine, Seoul, Republic of Korea. FAU - Lee, Won Il AU - Lee WI AD - Department of Microbiology, University of Ulsan College of Medicine, Seoul, Republic of Korea. FAU - Kim, Ji Hyun AU - Kim JH AD - Department of Microbiology, University of Ulsan College of Medicine, Seoul, Republic of Korea. FAU - Ahn, Jeonghyun AU - Ahn J AD - Department of Microbiology, University of Ulsan College of Medicine, Seoul, Republic of Korea. FAU - Han, Jeong Hee AU - Han JH AD - Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea. FAU - Lim, Sue Yeon AU - Lim SY AD - Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea. FAU - Lee, Won Woo AU - Lee WW AD - Department of Nuclear Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea. FAU - Lee, Heuiran AU - Lee H AD - Department of Microbiology, University of Ulsan College of Medicine, Seoul, Republic of Korea. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20151008 PL - Greece TA - Int J Oncol JT - International journal of oncology JID - 9306042 RN - 0 (Antineoplastic Agents) RN - 0 (Antiviral Agents) RN - 0 (RNA, Small Interfering) RN - 0 (Viral Proteins) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.1.21 (Thymidine Kinase) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - P9G3CKZ4P5 (Ganciclovir) SB - IM MH - Animals MH - Antineoplastic Agents/pharmacology MH - Antiviral Agents/pharmacology MH - Blotting, Western MH - Dependovirus MH - Ganciclovir/pharmacology MH - Genes, Transgenic, Suicide MH - Genetic Therapy/*methods MH - Genetic Vectors MH - HeLa Cells MH - Humans MH - Male MH - Mice, Inbred BALB C MH - Mice, Nude MH - Neoplasms, Experimental/*therapy MH - RNA, Small Interfering MH - Simplexvirus/*genetics MH - TOR Serine-Threonine Kinases/*genetics MH - Thymidine Kinase/*genetics MH - Transduction, Genetic MH - Viral Proteins/*genetics MH - Xenograft Model Antitumor Assays EDAT- 2015/10/16 06:00 MHDA- 2016/09/08 06:00 CRDT- 2015/10/14 06:00 PHST- 2015/07/31 00:00 [received] PHST- 2015/09/25 00:00 [accepted] PHST- 2015/10/14 06:00 [entrez] PHST- 2015/10/16 06:00 [pubmed] PHST- 2016/09/08 06:00 [medline] AID - 10.3892/ijo.2015.3194 [doi] PST - ppublish SO - Int J Oncol. 2015 Dec;47(6):2233-9. doi: 10.3892/ijo.2015.3194. Epub 2015 Oct 8.