Transfection of gene Livin α/β into A549 cells and separate effect on the cell growth

Objective ：To express two Livin isoforms （Livin α ＆ β genes） with transfection techniques in A549 cell line respectively in order to observe their effect on growth of cell line. Methods ：Two eukaryotic expression vectors of l.ivin, pcDNA3.1-Livin α ＆ β, were transfected into A549 cell line by electroporation. Then G418 resistant clones were screened. RT-PCR, Northern blot and immunofluorescence cytochemistry were used to detect Livin α ＆ β expression level in the transfected cells. Finally, observation of cell morphology, growth curve assay and colony formation analysis were performed to explore the effect of Livin on growth of the cells. Results：Livin α ＆ β were expressed in transfected A549 cells, and induced a faster cell growth, shorter doubling time and stronger cell colony forming ability, yet had no morphology change. Conclusion：Both isoforms can accelerate the growth of A549 cells, indicating a close relationship between Livin expression and the genesis and development of lung cancer. The expression of Livin α ＆ β in A549 cells provides basis for further study of their different biological functions of anti-apoptosis and of their role in lung cancer cell resistance to radiotherapy and chemotherapy.