@article{23147,
  keywords = {Adult, Female, Humans, Aged, Male, Middle Aged, United States, Australia, Genotype, GTP Phosphohydrolases, Melanoma, Membrane Proteins, Mutation, Phenotype, Proto-Oncogene Proteins B-raf, Receptor, Melanocortin, Type 1, Skin Neoplasms},
  author = {Group GEM and Dwyer T and Thomas Nancy and Edmiston Sharon and Kanetsky Peter and Busam Klaus and Kricker Anne and Armstrong Bruce and Cust Anne and Anton-Culver Hoda and Gruber Stephen and Luo Li and Orlow Irene and Reiner Anne and Gallagher Richard and Zanetti Roberto and Rosso Stefano and Sacchetto Lidia and Parrish Eloise and Hao Honglin and Gibbs David and Frank Jill and Ollila David and Begg Colin and Berwick Marianne and Conway Kathleen},
  title = {Associations of MC1R Genotype and Patient Phenotypes with BRAF and NRAS Mutations in Melanoma.},
  abstract = {<p>
Associations of MC1R with BRAF mutations in melanoma have been inconsistent between studies. We sought to determine for 1,227 participants in the international population-based Genes, Environment, and Melanoma (GEM) study whether MC1R and phenotypes were associated with melanoma BRAF/NRAS subtypes. We used logistic regression adjusted by age, sex, and study design features and examined effect modifications. BRAFwere associated with younger age, blond/light brown hair, increased nevi, and less freckling, and NRASwith older age relative to the wild type (BRAF/NRAS) melanomas (all P &lt; 0.05). Comparing specific BRAF subtypes to the wild type, BRAF V600E was associated with younger age, blond/light brown hair, and increased nevi and V600K with increased nevi and less freckling (all P &lt; 0.05). MC1R was positively associated with BRAF V600E cases but only among individuals with darker phototypes or darker hair (P&lt; 0.05) but inversely associated with BRAF V600K (P&nbsp;= 0.006) with no significant effect modification by phenotypes. These results support distinct etiologies for BRAF V600E, BRAF V600K, NRAS, and wild-type melanomas. MC1R's associations with BRAF V600E cases limited to individuals with darker phenotypes indicate that MC1R genotypes specifically provide information about BRAF V600E melanoma risk in those not considered high risk based on phenotype. Our results also suggest that melanin pathways deserve further study in BRAF V600E melanomagenesis.
</p>
},
  year = {2017},
  journal = {J Invest Dermatol},
  volume = {137},
  pages = {2588-2598},
  issn = {1523-1747},
  doi = {10.1016/j.jid.2017.07.832},
  language = {eng},
}