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Objective : Mitochondrial imbalance of division and fusion will lead to uncontrolled cell growth. This study investigated the effects of mitochondrial dynamics regulated by dynamin-related protein 1 (Drp1) on the invasion and metastasis of lung cancer cells at the cellular level. Methods : Lentivirus-mediated RNAi and gene overexpression vectors containing shDrp1 and Lv-Drp1 were transfected into lung adenocarcinoma cell lines 95D and A549, respectively. An MTT assay was used to assess cell viability and a cell clone assay was used to evaluate the tumorigenic ability of lentivirus-infected cells. Cell invasion and wound healing assays were used to assess cell invasiveness and the migration rate after lentivirus infection. Annexin V-APC staining was used to determine the cell apoptosis rate. Results : In 95D cells, when the Drp1 gene is overexpressed (OE) the proliferation rate and apoptosis rate were significantly higher than those in the control group (NC OE ) (P &lt; 0. 05). There was no significant difference in clone number, invasion rate, and migration rate between the two groups (P &gt; 0. 05). The proliferation rate and clone number in the shDrp1 infected 95D cell group (KD) were significantly lower than those in the control group (NC KD ) (P &lt; 0. 05). There was no difference in apoptosis rate, invasion rate, and migration rate between h (P &gt; 0.05). In A549 cells, unlike in 95D cells, the invasion rate of the KD group was 25% lower than that of the NC KD group (P &lt; 0.05). After 8 hours, the cell migration rates of the two groups were basically the same, but after 24 hours, the migration rate of the KD group was 10% lower than that of the NC KD group (P &lt; 0.05). Compared with the NC OE group, the migration rate of the OE group increased significantly (P &lt; 0.05). Conclusion : Mitochondrial Drp1 is associated with the proliferation, invasion, and metastasis of lung adenocarcinoma cells. Inhibition of Drp1 expression may contribute to anti-tumor therapy for lung cancer.

Effects of Dynamin-related Protein 1 Regulated Mitochondrial Dynamic Changes on Invasion and Metastasis of Lung Cancer Cells