Analysis of the frequency of NRAS and c-Kit gene mutations in patients with BRAF-negative melanoma
Maria B. Aksenenko , A. V Komina , T. G Ruksha
Russian Journal of Skin and Venereal Diseases ›› 2016, Vol. 19 ›› Issue (6) : 324 -327.
Analysis of the frequency of NRAS and c-Kit gene mutations in patients with BRAF-negative melanoma
Identification of molecular subtypes of melanoma allowed to use a personalized approach in the treatment of melanoma. One of the most common driver mutations in melanoma is a mutation of the oncogene BRAF, that is determined in 40-60% of all melanomas. However, BRAF-negative tumors require further investigation of mutational status, which can be applied not only to select the means of personalized therapy of tumor, but also for the prediction of disease course. This article presents an analysis of 37 patients with melanoma BRAF-negative for mutations in the genes NRAS and c-Kit. Mutations were identified in the 3 exon of the gene NRAS in 8.1% of cases. In skin melanomas «silent» mutations were identified in 64.7% that confirm the occurrence ofpronounced mutation under the influence of ultraviolet radiation on the skin of the patient. We identified clinical and morphological features ofpatients with NRAS mutation in the 3 exon. This group ofpatients is characterized by a greater thickness of the tumor Breslow. Female gender and older age were dominated clinical characteristics in this group as compared with patients without NRAS mutations (p < 0.05).
melanoma of the skin / sequencing / NRAS gene / c-Kit gene
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