title: Reversal of the malignant phenotype of cervical cancer CaSki cells through adeno-associated virus-mediated delivery of HPV16 E7 antisense RNA.
abstract: Human papillomavirus (HPV) infection is the most important risk factor for the development of cervical cancer. The oncogene E7 from high-risk HPV strains has the ability to immortalize epithelial cells and increase cellular transformation in culture. In this study, we explored the possibility of preventing cervical cancer growth by inhibiting HPV16 E7 expression through gene transfer of an antisense construct. A recombinant adeno-associated virus (rAAV) vector was chosen for the transfer, based on its transfection efficiency, in vivo stability, and lack of detectable pathology. In vitro transfer of an rAAV vector expressing antisense HPV16 E7 (AAV-HPV16E7AS) inhibited cell proliferation, induced apoptosis, reduced cell migration, and restrained in vivo proliferation of HPV16/HPV18-positive cervical cancer CaSki cells. These results indicate that down-regulation of HPV16 E7 with antisense RNA is beneficial in reducing the tumorigenicity of CaSki cells, and rAAV vectors ought to be a new efficient approach for delivering the expression of therapeutic genes.
authors.affiliation: Cancer Biology Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, Republic of China.
authors.forename: Sufang
authors.initials: S
authors.lastname: Wu
authors.forename: Li
authors.initials: L
authors.lastname: Meng
authors.forename: Shixuan
authors.initials: S
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Xi
authors.forename: Xun
authors.initials: X
authors.lastname: Tian
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Zhou
authors.forename: Gang
authors.initials: G
authors.lastname: Xu
authors.forename: Yunping
authors.initials: Y
authors.lastname: Lu
authors.forename: Ding
authors.initials: D
authors.lastname: Ma
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D015197:Carcinogenicity Tests / Q000379:methods; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000378:metabolism / Q000821:virology*; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D004195:Disease Models, Animal; D015536:Down-Regulation; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D015967:Gene Expression Regulation, Viral; D005822:Genetic Vectors / Q000235:genetics; D006801:Humans; D066298:In Vitro Techniques; D051379:Mice; D008807:Mice, Inbred BALB C; D008819:Mice, Nude; D009368:Neoplasm Transplantation; D009856:Oncogene Proteins, Viral / Q000037:antagonists & inhibitors* / Q000235:genetics / Q000378:metabolism; D050725:Papillomavirus E7 Proteins; D010641:Phenotype; D016372:RNA, Antisense / Q000494:pharmacology*; D011994:Recombinant Proteins / Q000378:metabolism; D013329:Structure-Activity Relationship; D014161:Transduction, Genetic; D014407:Tumor Cells, Cultured; D002583:Uterine Cervical Neoplasms / Q000235:genetics* / Q000378:metabolism / Q000821:virology*
chemical_list: D009856:Oncogene Proteins, Viral; D050725:Papillomavirus E7 Proteins; D016372:RNA, Antisense; D011994:Recombinant Proteins; C059731:oncogene protein E7, Human papillomavirus type 16