GPX2 and lung adenocarcinoma: In this study, the expression of GPX2 in lung adenocarcinoma and its effect on the prognosis of lung adenocarcinoma were analyzed by bioinformatics, then detected the expression level of GPX2 in lung adenocarcinoma tissues by immunohistochemistry, and observed the effect of GPX2 on the phenotype of A549 cells by overexpression and knockdown of GPX2 gene in lung adenocarcinoma A549 cells, aiming to clarify the role of GPX2 in the development of lung adenocarcinoma and provide theoretical basis for the diagnosis and treatment of lung adenocarcinoma.