FOXP3 and lung adenocarcinoma: We found that the expression level of FOXP3 was significantly lower in the PCBP1-AS1 high expression group than in the PCBP1-AS1 low expression group (Figures 10A and 10B), indicating that PCBP1-AS1 expression was negatively correlated with the degree of Treg cell infiltration in lung adenocarcinoma.