CD8A and neoplasm: B4GALT1 mRNA levels negatively correlated with CD8 + T-cell infiltration (Figure S2A), and tumours with higher B4GALT1 mRNA levels had higher tumour immune dysfunction and exclusion (TIDE) scores than those with lower B4GALT1 expression, suggesting the immunosuppressive role of B4GALT1 in LUAD tumorigenesis (Figure S2B).