This paper explores the effect of knockdown SEMA3A gene on the migration and invasion of glioma cell line U251. Preliminary discussion of the potential in treatment of glioma was carried out. The highest knockdown efficiency plasmid packaged by a lentivirus packaging vector system was constructed, which contained a p FH-GFP-L vector and a short hairpin RNA(sh RNA) sequence targeting the human SEMA3A gene. U251 cells were infected with a modified lentivirus vector. The infection efficiency of sh RNA targetin...