Identification of a novel gene fusion (BMX-ARHGAP) in gastric cardia adenocarcinoma

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• 作者：Xiaofeng Xu (1)
  Lifang Xu (2)
  Feng Gao (3)
  Jianjiang Wang (3)
  Jinsong Ye (1)
  Mingxian Zhou (1)
  Yunling Zhu (1)
  Lan Tao (1)
  
  1. Clinical Laboratory ; People鈥檚 hospital ; Jingjiang ; 214500 ; Jiangsu ; China
  2. Department of Gastroenterology ; People鈥檚 hospital ; Jingjiang ; 214500 ; Jiangsu ; China
  3. Department of General Surgery ; People鈥檚 hospital ; Jingjiang ; 214500 ; Jiangsu ; China
  
• 关键词：Gastric cardia adenocarcinoma (GCA) ; RNA ; Seq ; Gene fusion
• 刊名：Diagnostic Pathology
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：9
• 期：1
• 全文大小：2,966 KB
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• 刊物主题：Pathology;
• 出版者：BioMed Central
• ISSN：1746-1596

文摘

Background Gastric cardia adenocarcinoma (GCA) is one of the major causes of cancer related mortality worldwide. We aim to provide new understanding in the pathogenesis of GCA through investigations on gene expression alterations. Methods We preformed RNA-Seq for one pair of GCA and matched non-tumor tissues. Differentially expressed genes (DEGs) and fusion genes were acquired. PCR and gel analysis in additional 14 pairs of samples were performed to validate the chimeric transcripts. Results 1590 up-regulated and 709 down-regulated genes were detected. Functional analysis revealed that these DEGs were significantly overrepresented in gene ontology items of cell cycle, tumor invasion and proliferation. Moreover, we firstly discovered 3 fusion genes in GCA, including BMX-ARHGAP, LRP5- LITAF and CBX3-C15orf57. The chimeric transcript BMX-ARHGAP was validated and recurrently occurred in 4/15 independent tumor tissues. Conclusions Our results may provide new understanding of GCA and biomarkers for further therapeutic studies. Virtual Slides The virtual slide(s) for this article can be found here: http://www.diagnosticpathology.diagnomx.eu/vs/13000_2014_218