†Cox proportional hazards Protein Tyrosine Kinase inhibitor regression. Boldface type indicates significant values. I, 5-hmC High/IDH2 High; II, 5-hmC Low/IDH2 High; III, 5-hmC High/IDH2 Low; IV, 5-hmC Low/IDH2 Low. The individual clinicopathological features that presented
significance in the univariate analysis were adopted as covariates in a multivariate Cox proportional hazards model for further analysis. 5-hmC and IDH2 were prognostic indicators of OS (P <0.001 and P <0.001) and TTR (P <0.001 and P =0.001). When 5-hmC was combined with IDH2, we found that 5-hmC/IDH2 was also an independent prognostic indicator of both OS (P <0.001) and TTR (P <0.001) (Figure 2 and Table 2). Validation analysis of the better outcome of patients in the validation check details cohort with 5-hmC High/IDH2 High expression To validate our findings LY294002 mw of better outcomes in patients with 5-hmC High/IDH2 High expression, we studied a validation cohort that included 328 surgically resected HCC tumors. Briefly, we found that the 1- and 3-year OS rates in the 5-hmC Low/IDH2 Low patients were 66.3% and 46.3%, respectively, which were significantly lower than those in the 5-hmC High/IDH2 High patients (97.0% and 79.0%, respectively)
(Figure 3a). The cumulative recurrence rates in the 5-hmC Low/IDH2 Low patients were 52.5% and 71.3%, respectively, which were significantly higher than those in the 5-hmC High/IDH2 High patients (19.0% Amoxicillin and 36.0%, respectively) (Figure 3b). Figure 3 5-hmC and IDH2 expression and prognostic value in HCC tissue (validation cohort, N = 328). Kaplan-Meier curves depiciting OS (a) and TTR (b) for 5-hmC expression, IDH2 expression, and combined 5-hmC/IDH2 expression. I, 5-hmC High/IDH2 High; II, 5-hmC Low/IDH2 High; III, 5-hmC High/IDH2 Low; IV, 5-hmC Low/IDH2 Low. Univariate analysis revealed that 5-hmC (P <0.001 and P <0.001), IDH2 (P =0.001 and P <0.001), and 5-hmC/IDH2 combined (P <0.001 and P <0.001) were associated with OS and TTR. In a multivariate Cox proportional hazards model, 5-hmC and
IDH2 were prognostic indicators of OS (P =0.005 and P =0.005) and TTR (P =0.008 and P =0.02). When 5-hmC and IDH2 were combined, we found that 5-hmC/IDH2 was also an independent prognostic indicator of both OS (P =0.007) and TTR (P =0.009) (Additional file 2: Table S3). Discussion To date, the available data on 5-hmC and IDH2 in HCC have been limited. In this study, we investigated the clinical relevance of 5-hmC and IDH2 protein expression in two large cohorts (n = 646) of surgically resected HCCs with 318 cases and 328 cases, respectively. We determined that high 5-hmC expression was significantly associated with favorable features in HCC patients. This finding may be substantiated by the fact that aggressive histopathological characteristics, including a high AFP level was significantly more frequent in patients with low 5-hmC expression than in those with high expression in training cohort.
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