NRAS and BRAF mutation frequency in primary oral mucosal melanoma

Rosario Rivera Buery, Chong Huat Siar, Naoki Katase, Mehmet Gunduz, Mathieu Lefeuvre, Masae Fujii, Masahisa Inoue, Kojun Setsu, Hitoshi Nagatsuka

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Oral mucosal melanoma (OMM) is a fatal sarcoma of unknown etiology. Histological morphology and genetic events are distinct from those of its cutaneous counterpart. Mutation and up-regulation of c-kit has been identified in OMM which may activate downstream molecules such as RAS and RAF. These molecules are involved in the mitogen-activated protein kinase (MAPK) pathway leading to tremendous cell proliferation and survival. NRAS and BRAF mutation and protein expression have been studied in other melanoma subtypes. The purpose of this study was to determine RAS protein expression and NRAS and BRAF mutation in 18 primary OMM cases using immunohistochemistry and mutation analysis. Results showed that RAS is intensely expressed in both in situ and invasive OMMs. However, NRAS mutation was only observed in 2/15 polymerase chain reaction (PCR) amplified cases both of which were silent mutations. On the other hand, BRAF missense mutations were observed only in 1/15 cases with PCR amplification. NRAS and BRAF mutations were independent from previously reported c-kit mutations. The classical V600E BRAF mutation was not found; instead a novel V600L was observed suggesting that the oncogenic event in OMM is different from that in skin melanoma. The low frequency of NRAS and BRAF mutations indicate that these genes are not common, but probable events in OMM pathogenesis, most likely independent of c-kit mutation.

Original languageEnglish
Pages (from-to)783-787
Number of pages5
JournalOncology Reports
Volume26
Issue number4
DOIs
Publication statusPublished - Oct 2011

Fingerprint

Mutation Rate
Melanoma
Mutation
Polymerase Chain Reaction
Skin
Missense Mutation
Mitogen-Activated Protein Kinases
Sarcoma
Cell Survival
Proteins
Up-Regulation
Immunohistochemistry
Cell Proliferation

Keywords

  • BRAF
  • Immunohistochemistry
  • Mutation
  • NRAS
  • Oral mucosal melanoma

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Buery, R. R., Siar, C. H., Katase, N., Gunduz, M., Lefeuvre, M., Fujii, M., ... Nagatsuka, H. (2011). NRAS and BRAF mutation frequency in primary oral mucosal melanoma. Oncology Reports, 26(4), 783-787. https://doi.org/10.3892/or.2011.1385

NRAS and BRAF mutation frequency in primary oral mucosal melanoma. / Buery, Rosario Rivera; Siar, Chong Huat; Katase, Naoki; Gunduz, Mehmet; Lefeuvre, Mathieu; Fujii, Masae; Inoue, Masahisa; Setsu, Kojun; Nagatsuka, Hitoshi.

In: Oncology Reports, Vol. 26, No. 4, 10.2011, p. 783-787.

Research output: Contribution to journalArticle

Buery, RR, Siar, CH, Katase, N, Gunduz, M, Lefeuvre, M, Fujii, M, Inoue, M, Setsu, K & Nagatsuka, H 2011, 'NRAS and BRAF mutation frequency in primary oral mucosal melanoma', Oncology Reports, vol. 26, no. 4, pp. 783-787. https://doi.org/10.3892/or.2011.1385
Buery RR, Siar CH, Katase N, Gunduz M, Lefeuvre M, Fujii M et al. NRAS and BRAF mutation frequency in primary oral mucosal melanoma. Oncology Reports. 2011 Oct;26(4):783-787. https://doi.org/10.3892/or.2011.1385
Buery, Rosario Rivera ; Siar, Chong Huat ; Katase, Naoki ; Gunduz, Mehmet ; Lefeuvre, Mathieu ; Fujii, Masae ; Inoue, Masahisa ; Setsu, Kojun ; Nagatsuka, Hitoshi. / NRAS and BRAF mutation frequency in primary oral mucosal melanoma. In: Oncology Reports. 2011 ; Vol. 26, No. 4. pp. 783-787.
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