Circulating cell-free DNA of methylated insulin-like growth factor-binding protein 7 predicts a poor prognosis in hepatitis B virus-associated hepatocellular carcinoma after hepatectomy

Free Radical Research
Feng LiKai Wang

Abstract

The initiation and progression of hepatocellular carcinoma (HCC) is a multistage process involving a variety of changes at the gene level. Methylation of insulin-like growth factor-binding protein 7 (IGFBP7) plays a crucial role in HCC development. The main purpose of this study was to investigate the relationship between oxidative stress, DNA methyltransferases (DNMTs) expression, and IGFBP7 methylation, and to evaluate the prognostic value of serum IGFBP7 methylation status in patients with HCC after hepatectomy. We enrolled 155 patients with HCC undergoing surgical resection. The IGFBP7 methylation status, DNMTs mRNA levels and malondialdehyde (MDA), xanthine oxidase (XOD), reduced glutathione hormone (GSH), and glutathione-S-transferases (GST) levels were detected. MDA and XOD levels were significantly higher in IGFBP7 methylated group than unmethylated group, while GSH level was lower in methylated group than unmethylated group. The DNMT1 and DNMT3a mRNA levels were higher in IGFBP7 methylated group than unmethylated group. Kaplan-Meier curve analysis revealed that IGFBP7 promoter methylation was significantly correlated with overall survival (OS) (p < .001). Moreover, IGFBP7 methylation was an independent prognostic predi...Continue Reading

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