BRAF, NRAS, melanoma, miRNA, Animals, Cell Line, Tumor, Cell Proliferation, Cell Transformation, Neoplastic, Disease Progression, GTP Phosphohydrolases, Gene Expression Regulation, Neoplastic, Humans, Melanoma, Membrane Proteins, Mice, Nude, MicroRNAs, Mutation, Nerve Tissue Proteins, Proto-Oncogene Proteins B-raf, Receptors, Notch, Signal Transduction, Skin Neoplasms, Time Factors, Transfection, Tumor Burden