Asian Pacific Journal of Cancer Prevention

Asian Pacific Journal of Cancer Prevention (아시아태평양암예방학회)
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Compound HRAS/PIK3CA Mutations in Chinese Patients with Alveolar Rhabdomyosarcomas

  • Liu, Chun-Xia (Department of Pathology, Shihezi University School of Medicine) ;
  • Li, Xiao-Ying (Department of Pathology, Shihezi University School of Medicine) ;
  • Li, Cheng-Fang (Department of Pathology, Shihezi University School of Medicine) ;
  • Chen, Yun-Zhao (Department of Pathology, Shihezi University School of Medicine) ;
  • Cui, Xiao-Bin (Department of Pathology, Shihezi University School of Medicine) ;
  • Hu, Jian-Ming (Department of Pathology, Shihezi University School of Medicine) ;
  • Li, Feng (Department of Pathology, Shihezi University School of Medicine)
  • Published : 2014.02.28
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Abstract

The rhabdomyosarcoma (RMS) is the most common type of soft tissue tumor in children and adolescents; yet only a few screens for oncogenic mutations have been conducted for RMS. To identify novel mutations and potential therapeutic targets, we conducted a high-throughput Sequenom mass spectrometry-based analysis of 238 known mutations in 19 oncogenes in 17 primary formalin-fixed paraffin-embedded RMS tissue samples and two RMS cell lines. Mutations were detected in 31.6% (6 of 19) of the RMS specimens. Specifically, mutations in the NRAS gene were found in 27.3% (3 of 11) of embryonal RMS cases, while mutations in NRAS, HRAS, and PIK3CA genes were identified in 37.5% (3 of 8) of alveolar RMS (ARMS) cases; moreover, PIK3CA mutations were found in 25% (2 of 8) of ARMS specimens. The results demonstrate that tumor profiling in archival tissue samples is a useful tool for identifying diagnostic markers and potential therapeutic targets and suggests that these HRAS/ PIK3CA mutations play a critical role in the genesis of RMS.

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References

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