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Decreased expression of the DBC2 gene and its clinicopathological significance in breast cancer: correlation with aberrant DNA methylation

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Abstract

Loss of DBC2 (deleted in breast cancer 2) gene expression is frequent in breast cancer tissues. This can be explained by homozygous deletions or other mutations in a minority of cases but alternative mechanisms need to be investigated. Here, DBC2 expression was significantly suppressed compared with normal breast tissues in breast cancer tissues when analyzed by RT-PCR. Furthermore, DNA methylation on DBC2 was more prevalent in breast tumors than in normal tissues. DBC2 mRNA levels correlated with the degree of DBC2 methylation in breast cancer tissues and in a breast cancer cell line (T47D). Clinico-pathological correlation analysis showed that DBC2 promoter methylation was associated with tumor-node-metastasis stages II and III/IV, lymph node metastasis, p53 mutation, and HER2-positive status. Thus loss of DBC2 expression is caused by abnormal methylation of DBC2 and might have a role in breast cancer development.

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Acknowledgments

We would like to thank the patients for their participation and cooperation in providing tissue samples and information. The work described in this paper was supported by the Shandong Natural Science Fund of China (ZR2009CM086), the Shandong Provincial Education Fund of China (J09LC19), and the Sci-Tech Support Program of Qingdao of China (No. 09-1-1-8-nsh).

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Authors and Affiliations

  1. Department of Biochemistry and Molecular Biology, Medical College, Qingdao University, Qingdao, 266021, Shandong, China

    Linlin Han, Lin Hou & Yinlin Ge

  2. Department of Laboratory, Women and Children’s Health Care Center of Qingdao, Qingdao, 266011, Shandong, China

    Jinlian Song

  3. Department of Pathology, The Affiliated Hospital of Qingdao University Medical College, Qingdao, 266000, Shandong, China

    Dongliang Lin

  4. Department of Breast Surgery, The Affiliated Hospital of Qingdao University Medical College, Qingdao, 266000, Shandong, China

    Li Wu & Zhongliang Ma

Authors
  1. Linlin Han
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  2. Lin Hou
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  3. Jinlian Song
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  4. Dongliang Lin
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  5. Li Wu
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  6. Yinlin Ge
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  7. Zhongliang Ma
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Corresponding author

Correspondence to Lin Hou.

Additional information

Linlin Han and Lin Hou contributed equally to this study.

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Han, L., Hou, L., Song, J. et al. Decreased expression of the DBC2 gene and its clinicopathological significance in breast cancer: correlation with aberrant DNA methylation. Biotechnol Lett 35, 1175–1181 (2013). https://doi.org/10.1007/s10529-013-1190-x

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  • DOI: https://doi.org/10.1007/s10529-013-1190-x

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