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• W2022843677 abstract "Amplification of the 11q13 chromosomal region is a common event in primary melanomas. Several candidate genes are localized at this sequence; however, their role in melanoma has not been clearly defined. The aim of this study was to develop an accurate method for determining the amplification pattern of six candidate genes that map to this amplicon core and to elucidate the possible relationship between BRAF, NRAS mutations and CCND1 copy number alterations, all of which are key components of the MAP kinase pathway. Characterization of gene copy numbers was performed by quantitative PCR and, as an alternative method, fluorescence in situ hybridization was used to define the CCND1 amplification pattern at the single cell level. Samples with amplified CCND1 (32%) were further analyzed for copy number alterations for the TAOS1, FGF3, FGF19, FGF4 and EMS1 genes. Co-amplification of the CCND1 and TAOS1 was present in 15% of tumors and was more frequent in ulcerated lesions (P=0.017). Furthermore, 56% of primary melanomas had either BRAF or NRAS mutations, but these two mutations were not present in any of the lesions analyzed. Of these cases, 34% also had CCND1 amplification. There was a significant relationship between NRAS activating mutations and UV exposure (P=0.005). We did not find correlations between CCND1 gene amplification status and any of the patients' clinicopathological parameters. However, CCND1 amplification simultaneously with either BRAF or NRAS activation mutations was observed mainly in primary tumors with ulcerated surfaces (P=0.028). We assume that co-amplification of these candidate genes in the 11q13 region or CCND1 gene alterations along with either BRAF or NRAS mutations might be more important for prognosis than the presence of these alterations alone." @default.
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• W2022843677 date "2009-10-01" @default.
• W2022843677 modified "2023-09-27" @default.
• W2022843677 title "Characterization of candidate gene copy number alterations in the 11q13 region along with BRAF and NRAS mutations in human melanoma" @default.
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• W2022843677 doi "https://doi.org/10.1038/modpathol.2009.109" @default.
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