Cited by 183Melanoma and MAPK PathwaysNeurofibromatosis and Schwannoma CasesProtein Kinase Regulation and GTPase Signaling

Mutually exclusive NRASQ61R and BRAFV600E mutations at the single-cell level in the same human melanoma

Sensi, M, Nicolini, G, Petti, C, Bersani, I, Lozupone, F, Molla, A, Vegetti, C, Nonaka, D +4 more·2006·Oncogene

Abstract

Activating BRAF or NRAS mutations have been found in 80% of human sporadic melanomas, but only one of these genetic alterations could be detected in each tumour. This suggests that BRAF and NRAS 'double mutants' may not provide advantage for tumour growth, or may even be selected against during tumorigenesis. However, by applying mutant-allele-specific-amplification-PCR method to short-term melanoma lines, one out of 14 tumours was found to harbour both BRAFV600E and the activating NRASQ61R mutations. On the other hand, analysis of 21 melanoma clones isolated by growth in soft agar from this tumour indicated that 16/21 clones harboured a BRAFV600E, but were wild-type for NRAS, whereas the remaining had the opposite genotype (NRASQ61R/wild-type BRAF). When compared to BRAFV600E clones, NRASQ61R clones displayed reduced growth in soft agar, but higher proliferative ability in vitro in liquid medium and even in vivo after grafting into SCID/SCID mice. These data suggest that NRAS and BRAF activating mutations can coexist in the same melanoma, but are mutually exclusive at the single-cell level. Moreover, the presence of NRASQ61R or BRAFV600E is associated with distinct in vitro and in vivo growth properties of neoplastic cells.

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Crossref · 10.1038/sj.onc.1209379

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Authors
Sensi, M., Nicolini, G., Petti, C., Bersani, I., Lozupone, F., Molla, A., Vegetti, C., Nonaka, D., Mortarini, R., Parmiani, G., Fais, S., & Anichini, A.
Affiliations
  • Fondazione IRCCS Istituto Nazionale dei Tumori (IT)
  • Istituto Superiore di Sanità (IT)
Corresponding author
Sensi, M
Venue
Oncogene
Published
2006-02-06
Volume
25
Issue
24
Pages
3357-3364
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2057818550
Cited by
183
References
33
Citations by year
2026: 2 · 2024: 8 · 2023: 4 · 2022: 14 · 2021: 13 · 2020: 9 · 2019: 12 · 2018: 11 · 2017: 6 · 2016: 11 · 2015: 17 · 2014: 14 · 2013: 8 · 2012: 13
FWCI
3.67
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
Funders
Associazione Italiana per la Ricerca sul Cancro
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Health Sciences › Medicine › Neurology › Neurofibromatosis and Schwannoma Cases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
melanoma, NRAS Q61R mutation, BRAF V600E mutation, co-occurring mutations, mutually exclusive mutations, single-cell analysis, soft agar growth, tumorigenicity, SCID mouse xenograft
MeSH terms
Animals, Base Sequence, Female, Genotype, Humans, Melanoma, Molecular Sequence Data, Mutation, Neoplasm Transplantation, Genes, ras, Mice, SCID, Cell Line, Tumor, Proto-Oncogene Proteins B-raf, Mice

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