Journal of Gastric Cancer

The Korean Gastric Cancer Association (대한위암학회)
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Amplification of the UQCRFS1 Gene in Gastric Cancers

  • Jun, Kyong-Hwa (Department of General Surgery, The Catholic University of Korea) ;
  • Kim, Su-Young (Department of Pathology, College of Medicine, The Catholic University of Korea) ;
  • Yoon, Jung-Hwan (Department of Pathology, College of Medicine, The Catholic University of Korea) ;
  • Song, Jae-Hwi (Department of Pathology, College of Medicine, The Catholic University of Korea) ;
  • Park, Won-Sang (Department of Pathology, College of Medicine, The Catholic University of Korea)
  • Received : 2012.03.13
  • Accepted : 2012.05.09
  • Published : 2012.06.30
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Abstract

Purpose: The specific aim of this study is to unravel a DNA copy number alterations, and to search for novel genes that are associated with the development of Korean gastric cancer. Materials and Methods: We investigated a DNA copy number changes in 23 gastric adenocarcinomas by array-comparative genomic hybridization and quantitative real-time polymerase chain reaction analyses. Besides, the expression of UQCRFS1, which shows amplification in array-CGH, was examined in 186 gastric cancer tissues by an immunohistochemistry, and in 9 gastric cancer cell lines, as well as 24 gastric cancer tissues by immunoblotting. Results: We found common gains at 48 different loci, and a common loss at 19 different loci. Amplification of UQCRFS1 gene at 19q12 was found in 5 (21.7%) of the 23 gastric cancers in an array-comparative genomic hybridization and DNA copy number were increased in 5 (20.0%) out of the 25 gastric cancer in quantitative real-time polymerase chain reaction. In immunohistochemistry, the overexpression of the protein was detected in 105 (56.5%) out of the 186 gastric cancer tissues. Statistically, there was no significant relationship between the overexpression of UQCRFS1 and clinicopathologic parameters (P>0.05). In parallel, the overexpression of UQCRFS1 protein was confirmed in 6 (66.7%) of the 9 gastric cancer cell lines, and 12 (50.0%) of the 24 gastric cancer tissues by immunoblotting. Conclusions: These results suggest that the overexpression of UQCRFS1 gene may contribute to the development and/or progression of gastric cancer, and further supported that mitochondrial change may serve as a potential cancer biomarker.

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References

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