Prognostic factors of non-muscle invasive bladder cancer: a study based on next-generation sequencing

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Abstract

Objective: To investigate the genetic prognostic factors for the recurrence of non-muscle invasive bladder cancer. Materials and methods: The patients underwent transurethral resection of bladder tumor and received bacillus Calmette–Guérin (BCG) or epirubicin. Next-generation sequencing was performed and alterations of genes, pathways, and tumor mutation burden were recorded. Associations between these clinicopathological and genetic variants were estimated, and prognostic factor identified. Results: A total of 58 cases were included in our study, and 46 patients underwent treatment with BCG. FGFR3 was the most frequently altered gene (48%), and more commonly detected in intermediate-risk patients. Univariate Cox analysis demonstrated that 10 genes were significantly correlated with BCG failure, while NEB, FGFR1 and SDHC were independent recurrence predictors. Besides, epigenetic-related gene pathway mutations were negatively correlated with recurrence (hazard ratio: 0.198, P = 0.023). DNA damage response and repair gene alterations were positively correlated with tumor burden, while altered TP53 was most frequent among these genes and significant correlated with high tumor burden. Conclusion: BCG instillation significantly reduced the rate of recurrence compared with epirubicin in this population. Potential biomarkers and therapeutic targets were found with the help of next-generation sequencing; correlations between DDR genes alterations and high tumor mutation burden were also demonstrated.

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Shao, Y., Hu, X., Yang, Z., Lia, T., Yang, W., Wu, K., … Li, X. (2021). Prognostic factors of non-muscle invasive bladder cancer: a study based on next-generation sequencing. Cancer Cell International, 21(1). https://doi.org/10.1186/s12935-020-01731-9

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