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摘要
Background: Studies have shown that the immune infiltration of tumor microenvironment is related to the prognosis of glioblastoma, which is characterized by high heterogeneity, high recurrence rate and low survival rate. To unravel the role of beta 1,3-N-acetylglucosaminyltransferase-9 (beta 3GNT9) in the progression of glioblastoma, this study identifies the value of beta 3GNT9 as a prognostic biomarker in glioblastoma, and investigates the relationship between beta 3GNT9 expression and glioblastoma immune infiltration, migration and invasionMethods: beta 3GNT9 expression in glioblastoma was analyzed using the GEPIA database. The clinical features of glioblastoma were screened out from the TCGA database. The relationship between beta 3GNT9 expression and clinical features was analyzed. The relationship between beta 3GNT9 and the prognosis of glioblastoma was evaluated through univariate and multivariate COX regression analyses, and the survival analysis was conducted using the Kaplan-Meier method. GSEA was employed to predict the signaling pathway of beta 3GNT9 in glioblastoma. The correlation between beta 3GNT9 and tumor immune infiltration was analyzed using the related modules of CIBERSORT and TIMER. A172, U87MG and U251 cell lines were selected to verify beta 3GNT9 expression in vitro. The effects of beta 3GNT9 on the migration and invasion of glioblastoma were investigated through cell scratch and invasion assays.Results: beta 3GNT9 expression in glioblastoma group was significantly higher than that in normal brain tissue group (P<0.05). The overall survival rate in high beta 3GNT9 expression group was significantly lower than that in low beta 3GNT9 expression group (P<0.05). Regression analyses suggested that beta 3GNT9, involved primarily in glucosamine degradation and extracellular matrix receptor interaction, could be an independent prognostic factor for glioblastoma. CIBERSORT and GEPIA database analyses showed that beta 3GNT9 was correlated with tumor infiltrating immune cells such as T follicular helper cells, activating natural killer cells, monocytes, macrophages, and eosinophils, thus affecting the immune microenvironment of glioblastoma. Cell experiments confirmed that beta 3GNT9 was highly expressed in A172, U87MG and U251 cell lines (P<0.05), and promoted the migration and invasion of glioblastoma (P<0.05).Conclusion: The increased expression of beta 3GNT9 in glioblastoma can affect the immune microenvironment of glioblastoma and promote its migration and invasion. beta 3GNT9 can be used as a potential independent prognostic biomarker for patients with glioblastoma.
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单位哈尔滨医科大学
