BRAF and GNAQ mutations in melanocytic tumors of the oral cavity

Yoram Cohen, Nitza Goldenberg-Cohen, Sharon Akrish, Tali Shani, Ninette Amariglio, Olga Dratviman-Storobinsky, Ilana Kaplan, Iris Barshack, Abraham Hirshberg

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: The genetic factors participating in oral melanoma evolution have not been studied extensively. We aimed to analyze the prevalence of BRAF and GNAQ mutations in a series of oral melanocytic tumors, nevi, and melanomas. Study Design: The study group consisted of 4 melanomas and 10 nevi (6 intramucosal, 4 blue nevi). DNA was extracted from paraffin-embedded tissue sections, and mutations in GNAQ and BRAF were analyzed with the use of mass spectrometery. Results: V600E point mutation was identified in the BRAF gene in 3 intramucosal nevi and in 2 melanomas. Only 1 blue nevus harbored the GNAQ209 mutation. None of the BRAF-positive samples harbored GNAQ mutations. Conclusions: The finding of BRAF mutations in oral benign and malignant melanocytic lesions points to a potential initiating role of BRAF in malignant transformation, which may have important therapeutic implications as those with BRAF mutations may benefit from specific treatment using RAF inhibitors.

Original languageEnglish
Pages (from-to)778-784
Number of pages7
JournalOral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Volume114
Issue number6
DOIs
StatePublished - Dec 2012

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