title: Establishment of surfactant-associated protein A suicide gene system and analysis of its activity.
abstract: Alveolar epithelial type II (AT II) cells are essential for lung development and remodeling, as they are precursors for type I cells and also produce other non-repair cells (fibroblasts). Progenitor cells are believed to possess capability of multi-potent transdifferentiation, which is closely related to the niche, suggesting the importance of establishment of a lung progenitor cell niche model. We hypothesized that pulmonary surfactant-associated protein A (SPA) suicide gene system would cause AT II cell to kill itself through apoptosis and leave its niche. In vitro, the recombinant adeno-associated virus vectors-SPA-thymidine kinase (rAAV-SPA-TK) system was established to get targeted apoptotic AT II cells. The apoptosis of AT II cells was detected by using MTT. The results showed that cloned SPA gene promoter had specific transcriptional activity in SPA high expression cells, and SPA high expression cells (H441) transfected with TK gene had higher sensitivity to ganciclovir (GCV) than SPA low expression cells (A549). In vivo, increased apoptosis of AT II cells induced by GCV in rAAV-SPA-TK system was observed by TUNEL. Finally, the successful packaging and application of rAAV-SPA-TK system provide experimental basis to get specific lung progenitor cell (AT II) niche in vitro and in vivo.
authors.affiliation: Department of Surgery, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Wan-Guang
authors.initials: WG
authors.lastname: Zhang
authors.affiliation: Department of Respiratory Medicine, Jingzhou Central Hospital, Jingzhou, 434020, China.
authors.forename: Li
authors.initials: L
authors.lastname: He
authors.affiliation: Department of Neurology, First People's Hospital of Changde, Changde, 430030, China.
authors.forename: Hua-Qing
authors.initials: HQ
authors.lastname: Su
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Shi
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Zhang
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Si-Si
authors.initials: SS
authors.lastname: Wu
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Li
authors.initials: L
authors.lastname: Mei
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Katirai
authors.initials: K
authors.lastname: Foad
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Yong-Jian
authors.initials: YJ
authors.lastname: Xu
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Zhen-Xiang
authors.initials: ZX
authors.lastname: Zhang
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Zhao
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Wei-Ning
authors.initials: WN
authors.lastname: Xiong
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
authors.forename: Guo-Hua
authors.initials: GH
authors.lastname: Zhen
authors.affiliation: Department of Respiratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China. huilanz_76@163.com.
authors.forename: Hui-Lan
authors.initials: HL
authors.lastname: Zhang
mesh_terms: D000998:Antiviral Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D000229:Dependovirus / Q000235:genetics; D004305:Dose-Response Relationship, Drug; D004591:Electrophoresis, Polyacrylamide Gel; D004847:Epithelial Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D015774:Ganciclovir / Q000494:pharmacology; D015972:Gene Expression Regulation, Neoplastic; D041722:Genes, Transgenic, Suicide / Q000235:genetics*; D005822:Genetic Vectors / Q000235:genetics; D006801:Humans; D020287:In Situ Nick-End Labeling; D008156:Luciferases / Q000235:genetics / Q000378:metabolism; D011401:Promoter Regions, Genetic / Q000235:genetics; D011650:Pulmonary Alveoli / Q000166:cytology / Q000378:metabolism; D037662:Pulmonary Surfactant-Associated Protein A / Q000235:genetics* / Q000378:metabolism; D013937:Thymidine Kinase / Q000235:genetics* / Q000378:metabolism
chemical_list: D000998:Antiviral Agents; D037662:Pulmonary Surfactant-Associated Protein A; D008156:Luciferases; D013937:Thymidine Kinase; D015774:Ganciclovir