Association of MC1R variants and host phenotypes with melanoma risk in CDKN2A mutation carriers: A GenoMEL study

F. Demenais*, H. Mohamdi, V. Chaudru, A. M. Goldstein, J. A. Newton Bishop, D. T. Bishop, P. A. Kanetsky, N. K. Hayward, E. Gillanders, D. E. Elder, M. F. Avril, E. Azizi, P. Van Belle, W. Bergman, G. Bianchi-Scarr, B. Bressac-De Paillerets, D. Calista, C. Carrera, J. Hansson, M. HarlandD. Hogg, V. Höiom, E. A. Holland, C. Ingvar, M. T. Landi, J. M. Lang, R. M. MacKie, G. J. Mann, M. E. Ming, C. J. Njauw, H. Olsson, J. Palmer, L. Pastorino, S. Puig, J. Randerson-Moor, M. Stark, H. Tsao, M. A. Tucker, P. Van Der Velden, X. R. Yang, N. Gruis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Background Carrying the cyclin-dependent kinase inhibitor 2A (CDKN2A) germline mutations is associated with a high risk for melanoma. Penetrance of CDKN2A mutations is modified by pigmentation characteristics, nevus phenotypes, and some variants of the melanocortin-1 receptor gene (MC1R), which is known to have a role in the pigmentation process. However, investigation of the associations of both MC1R variants and host phenotypes with melanoma risk has been limited. Methods We included 815 CDKN2A mutation carriers (473 affected, and 342 unaffected, with melanoma) from 186 families from 15 centers in Europe, North America, and Australia who participated in the Melanoma Genetics Consortium. In this family-based study, we assessed the associations of the four most frequent MC1R variants (V60L, V92M, R151C, and R160W) and the number of variants (1, ≥2 variants), alone or jointly with the host phenotypes (hair color, propensity to sunburn, and number of nevi), with melanoma risk in CDKN2A mutation carriers. These associations were estimated and tested using generalized estimating equations. All statistical tests were two-sided. Results Carrying any one of the four most frequent MC1R variants (V60L, V92M, R151C, R160W) in CDKN2A mutation carriers was associated with a statistically significantly increased risk for melanoma across all continents (1.24 × 10-6 ≤ P ≤. 0007). A consistent pattern of increase in melanoma risk was also associated with increase in number of MC1R variants. The risk of melanoma associated with at least two MC1R variants was 2.6-fold higher than the risk associated with only one variant (odds ratio = 5.83 [95% confidence interval = 3.60 to 9.46] vs 2.25 [95% confidence interval = 1.44 to 3.52]; Ptrend = 1.86 × 10-8). The joint analysis of MC1R variants and host phenotypes showed statistically significant associations of melanoma risk, together with MC1R variants (.0001 ≤ P ≤. 04), hair color (.006 ≤ P ≤. 06), and number of nevi (6.9 × 10-6 ≤ P ≤. 02). Conclusions Results show that MC1R variants, hair color, and number of nevi were jointly associated with melanoma risk in CDKN2A mutation carriers. This joint association may have important consequences for risk assessments in familial settings.

Original languageEnglish
Pages (from-to)1568-1583
Number of pages16
JournalJournal of the National Cancer Institute
Volume102
Issue number20
DOIs
StatePublished - 20 Oct 2010

Funding

FundersFunder number
Cancer Councils of New South Wales, Victoria and Queensland
DGRST.4/4235-P1.9
Fondo de Investigaciones Sanitarias05/0302, 06/0265, 03/0019
Programme Hospitalier de Recherche CliniquePHRC 2007-AOM-07-195
National Institutes of HealthRO1 CA88363, RO1 CA5558-01A2
National Cancer InstituteR01CA083115
Division of Cancer Epidemiology and Genetics, National Cancer Institute
Swedish Cancer Foundation
Cancer Research UKC588/A4994
National Health and Medical Research Council
Cancer Institute NSW
Cancerfonden
Ministero della Salute
Ligue Contre le CancerPRE09/FD
Vetenskapsrådet
Institut National du Cancer

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