HOXD9 affecting glioma proliferation and invasion

To investigate the expression of homology box D9 gene (HOXD9) in gliomas and its association with clinical features and prognosis, and to study the effect of HOXD9 gene on the proliferation and migration of glioma cells. HOXD9 knockdown models were constructed in U251 and U87-MG cell lines, and the effects of HOXD9 on glioma cell proliferation and invasion were verified using CCK8, plate cloning, Transwell, and migration assays. The expression levels of HOXD9 mRNA in TCGA database were also collected, and the prognostic value of HOXD9 was evaluated by plotting the survival curves. Gene set enrichment analysis (GSEA) was used to analyze the possible mechanism of HOXD9 gene in gliomas, and to analyze the correlation between the expression of HOXD9 gene and the immune cell infiltration of gliomas. In vitro experiments revealed that knockdown of HOXD9 expression inhibited the proliferation and migration of human glioma cells U251 and U87-MG. Bioinformatics showed that HOXD9 expression was up-regulated in gliomas, and HOXD9 expression correlated with overall survival (OS). GO and KEGG enrichment analyses revealed that HOXD9 was associated with multiple biological processes and signaling pathways. And the immune infiltration analysis about HOXD9 showed that HOXD9 was associated with a variety of immune cells, suggesting that HOXD9 might alter the immune microenvironment of the tumor. HOXD9 affects glioma cell proliferation and migration, and its expression is upregulated in glioma tissues, correlating with the prognosis of glioma patients. HOXD9 may serve as a potential therapeutic target and biomarker for glioma.