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• W2789777637 abstract "477 Background: Antimetabolites (e.g. methotrexate and gemcitabine) are not frequently used in the treatment of most solid tumors, but are effective in the treatment of UBC. Rapid cancer cell proliferation relies on an abundance of serine-derived one carbon units to support macromolecule synthesis. Specifically, PHGDH, which encodes a key enzyme of de novo serine synthesis, is amplified in breast cancer and in melanoma, and small molecule inhibitors of enzymes in this pathway are in early clinical development. However, the enzymes of serine and one carbon metabolism have not been widely investigated in UBC. Methods: We conducted an observational analysis of The Cancer Genome Atlas UBC cohort, focusing on gene expression data from a targeted panel indicated by Yang, et al. to be involved in serine and one carbon metabolism. Univariate Cox proportional hazard models were utilized to identify genes impacting OS and RFS, and a subsequent multivariate model was employed to control for inter-gene associations. Results: Expression data from 14 genes were analyzed among 436 UBC patients, of whom complete data were available for 422. At a median follow-up of 17 months, 188 of 422 patients had died. On univariate analysis, 7 of 14 genes were significantly associated with OS: PHGDH, PSPH, MTHFD1, MTHFD2, MTHFD1L, MTHFD2L, and ALDH1L2 (all P < 0.05). Interestingly, overexpression was associated with worse OS for all but one gene, MTHFD2L (HR 0.74), which is known to be underexpressed by cancer cells in favor of MTHFD2 (HR 1.21). In multivariate analysis, overexpression of PHGDH (HR 1.19, P = 0.008), MTHFD1 (HR 1.33, P = 0.041), and ALDH1L2 (HR 1.21, P < 0.001) were independent predictors of poor survival. RFS analysis was limited by missing data; nevertheless, univariate analyses found MTHFD1, MTHFD2, MTHFD1L, MTHFD2L, and ALDH1L2 to be associated with RFS (all P < 0.05). Conclusions: Within the limits of this observational study, these data suggest that serine and one carbon metabolism is important in the progression and prognosis of muscle-invasive bladder cancer. Subsequent in vitro analyses are needed to validate the prognostic and therapeutic significance of these findings." @default.
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• W2789777637 date "2018-02-20" @default.
• W2789777637 modified "2023-09-26" @default.
• W2789777637 title "Association of upregulation of serine and one carbon metabolism genes with shorter recurrence-free and overall survival in urothelial bladder cancer (UBC)." @default.
• W2789777637 doi "https://doi.org/10.1200/jco.2018.36.6_suppl.477" @default.
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