Effect of hypoxia on migration and adhesion of human pulmonary adenocarcinoma A549 cells / 肿瘤

ABSTRACT

Objective: To evaluate the effect of hypoxia on migration, invasion and adhesion to endothelial cells of human pulmonary adenocarcinoma A549 cells. Methods: Wound-healing and Transwell invasion assays were performed to study the effect of hypoxia on migration and invasion of A549 cells. Cell adhesion test was used to detect the adhesion of A549 cells to a monolayer of human umbilical vein endothelial cells (HUVECs). Immunofluorescence assay was used to evaluate the effect of hypoxia on distribution of E-cadherin, β-catenin, and F-actin. The luciferase reporter gene assay was performed to detect the transcription of hypoxia-inducible factor-1 (HIF-1) alpha. Results: Hypoxia promotes A549 cell migration, invasion, and adhesion to endothelial cells, and modulated the distribution of E-cadherin and β-catenin and rearrangement of actin cytoskeletal protein, and up-regulated HIF-1-dependent reporter gene expression in A549 cells. Conclusion: Hypoxia promoted A549 cell migration, invasion, and adhesion to endothelial cells by upregulating HIF-1-dependent gene expression, subsequently affecting the redistribution of E-cadherin and β-catenin and rearrangement of F-actin cytoskeletal protein.