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We read with interest the article by Wang et al1 on zinc-finger protein 545 (ZNF545) acting as a tumour suppressor gene (TSG) in gastric cancer by inhibiting rRNA transcription and its methylation as a prognostic factor for early stages of gastric cancer. Inactivation of TSGs through promoter hypermethylation also plays an important role in progression of hepatocellular carcinoma (HCC).2–4 We wish to report the results of the expression profile and epigenetic regulation of ZNF545 in HCC, and its methylation role on early-stage HCC progression after thermal ablation.
Our results showed reduced or loss of ZNF545 expression was found in seven human hepatic cancer cell lines, including SMMC7721, PRF/PCL-5, SK-hep1, HepG2, BEL7402, LAM3 and SNU449, by semiquantitative reverse transcription PCR. Expression of ZNF545 was detected in another cell of HBXF344. The methylation status of the ZNF545 promoter was examined by methylation-specific PCR (MSP). Complete methylation of the …