Abstract:
:The zinc-fingers and homeoboxes protein 1 (ZHX1) consists of 873 amino acid residues, is localized in the cell nucleus and appears to act as a transcriptional repressor. Previous studies have shown that ZHX1 interacts with nuclear factor Y subunit α (NF-YA), DNA methyltransferases (DNMT) 3B and ZHX2, all of which are involved in tumorigenesis. However, the exact role of ZHX1 in tumorigenesis remains unknown. The aim of the current study was to construct a recombinant eukaryotic expression plasmid containing the human ZHX1 (hZHX1) gene and to investigate the biological activities of ZHX1 in hepatocellular carcinoma (HCC). Reverse transcription-polymerase chain reaction (RT‑PCR) was used to amplify the N- and C-terminal fragments (ZHX1‑N and ZHX1‑C, respectively) of the hZHX1 gene. The two PCR fragments were cloned into the pEASY-T1 vector and subcloned into the pcDNA3 plasmid to generate a recombinant pcDNA3‑ZHX1 plasmid. Following identification by enzyme digestion and DNA sequencing, the recombinant pcDNA3‑ZHX1 plasmid was transfected into SMMC-7721 cells. The level of ZHX1 expression was detected by RT-PCR and western blot analysis. Cell growth curve assays were used to evaluate the effect of ZHX1 on cell proliferation. Moreover, the differential expression of ZHX1 between cancer and adjacent cirrhotic liver tissue was investigated by quantitative PCR (qPCR). Enzyme digestion and DNA sequencing confirmed the successful construction of the recombinant plasmid, pcDNA3‑ZHX1. qPCR and western blot analysis demonstrated that ZHX1 was efficiently expressed in SMMC-7721 cells and overexpression of ZHX1 may inhibit the proliferation of SMMC-7721 cells. In addition, reduced ZHX1 expression is widespread among cancer tissues from HCC patients. In conclusion, a recombinant eukaryotic expression plasmid, pcDNA3‑ZHX1, was successfully constructed. In addition, the current results indicate that a low expression of ZHX1 may be responsible for hepatocarcinogenesis.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Wang J,Liu D,Liang X,Gao L,Yue X,Yang Y,Ma C,Liu Jdoi
10.3892/mmr.2013.1700subject
Has Abstractpub_date
2013-11-01 00:00:00pages
1531-6issue
5eissn
1791-2997issn
1791-3004journal_volume
8pub_type
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