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DNA methylation and carcinogenesis of PRDM5 in cervical cancer

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Abstract

Objective

PR (PRDI-BF1 and RIZ) domain proteins (PRDM) are a subfamily of the kruppel-like zinc finger gene products and play key roles during cell differentiation and malignant transformation. PRDM5 (PR domain containing 5 PFM2) is a new PR-domain-containing gene. The purpose of the present study was to examine the expression of PRDM5 and evaluate its carcinogenesis in cervical cancer. The relationship between DNA methylation and transcriptional silencing of PRDM5 was investigated in cervical cancer.

Methods

PRDM5 expression was examined in cervical cancer cell lines and cervical tissues (12 normal and 42 cancerous) by using RT polymerase chain reaction (PCR). Methylation status of the PRDM5 promoter was studied using methylation-specific PCR (MSP).

Results

PRDM5 expression is reduced or lost in cervical cancers, compared with normal cervical tissues (P < 0.05). The current study results also showed that loss of PRDM5 is mediated by aberrant cytosine methylation of the PRDM5 promoter. There were 40.5% of carcinomas methylated, while none of normal tissues were methylated. PRDM5 mRNA expression was significantly higher (P = 0.000) in unmethylated (0.2634 ± 0.0674, mean ± SD), compared with methylated tissues (0.1007 ± 0.0993, mean ± SD). Last, treatment with a DNA methyltransferase inhibitor led to reactivation of PRDM5 expression in cell lines that had negligible PRDM5 expression at baseline.

Conclusions

Reduced expression of PRDM5 may play an important role in the pathogenesis and/or development of cervical cancer, and is considered to be caused in part by aberrant DNA methylation.

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Authors and Affiliations

  1. Department of Gynecologic Oncology, The Tumor Hospital of Harbin Medical University, 150 Haping Road, Heilongjiang, 150081, China

    Hai-Yan Cheng, Xiu-Wei Chen, Li Cheng, Yun-Duo Liu & Ge Lou

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  1. Hai-Yan Cheng
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  2. Xiu-Wei Chen
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  3. Li Cheng
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  4. Yun-Duo Liu
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  5. Ge Lou
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Correspondence to Ge Lou.

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Cheng, HY., Chen, XW., Cheng, L. et al. DNA methylation and carcinogenesis of PRDM5 in cervical cancer. J Cancer Res Clin Oncol 136, 1821–1825 (2010). https://doi.org/10.1007/s00432-010-0840-9

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  • DOI: https://doi.org/10.1007/s00432-010-0840-9

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