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Article

Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer

  • Authors:
    • Shi‑Lei Wen
    • Feng Zhang
    • Shi Feng
  • View Affiliations / Copyright

    Affiliations: Department of Human Anatomy, Academy of Preclinical and Forensic Medicine, West China Medicine College, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Thoracic and Cardiovascular Surgery, Huaihe Hospital of Henan University, Kaifeng, Henan 475000, P.R. China
  • Pages: 1098-1102
    |
    Published online on: July 25, 2013
       https://doi.org/10.3892/ol.2013.1492
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Abstract

An alteration in the mitochondrial DNA (mtDNA) copy number has been detected in numerous human cancers. However, certain changes in the mtDNA copy number that occur during the initiation and progression of gastric cancer remain undetected. In the present study, using quantitative PCR analysis, the quantitative changes in mtDNA were observed during the initiation and progression of gastric cancer. Furthermore, the possible correlation between the changes in mtDNA and the clinicopathological stage were also investigated. However, the mechanism by which the change in mtDNA copy number occurs remains to be elucidated. Epigenetic changes are believed to play a significant role in regulating the mtDNA content. In order to determine whether there is a potential correlation between DNA methylation and mtDNA regulation, in vitro demethylation experiments were performed. Tumor tissues and corresponding non‑cancerous tissues were surgically resected from 76 gastric cancer patients between 2010 and 2011. The results revealed that the average relative mtDNA copy numbers were 94.71±28.11 in the cancer tissues and 111.68±21.84 in the corresponding non‑cancerous tissues (P<0.01). The quantitative changes in mtDNA demonstrated a significant decrease in gastric cancer, particularly in ill‑defined stage III and IV cases, but had no association with gender. The mtDNA copy numbers demonstrated a marked increase (P<0.05) following demethylation treatment. The present results indicate that the mtDNA copy number plays a significant role during the progression of colorectal cancer, particularly during the late clinicopathological stages, and that the change in the mtDNA copy number may correlate with DNA methylation.
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Copy and paste a formatted citation
Spandidos Publications style
Wen SL, Zhang F and Feng S: Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer. Oncol Lett 6: 1098-1102, 2013.
APA
Wen, S., Zhang, F., & Feng, S. (2013). Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer. Oncology Letters, 6, 1098-1102. https://doi.org/10.3892/ol.2013.1492
MLA
Wen, S., Zhang, F., Feng, S."Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer". Oncology Letters 6.4 (2013): 1098-1102.
Chicago
Wen, S., Zhang, F., Feng, S."Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer". Oncology Letters 6, no. 4 (2013): 1098-1102. https://doi.org/10.3892/ol.2013.1492
Copy and paste a formatted citation
x
Spandidos Publications style
Wen SL, Zhang F and Feng S: Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer. Oncol Lett 6: 1098-1102, 2013.
APA
Wen, S., Zhang, F., & Feng, S. (2013). Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer. Oncology Letters, 6, 1098-1102. https://doi.org/10.3892/ol.2013.1492
MLA
Wen, S., Zhang, F., Feng, S."Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer". Oncology Letters 6.4 (2013): 1098-1102.
Chicago
Wen, S., Zhang, F., Feng, S."Decreased copy number of mitochondrial DNA: A potential diagnostic criterion for gastric cancer". Oncology Letters 6, no. 4 (2013): 1098-1102. https://doi.org/10.3892/ol.2013.1492
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