Pubertal development and prostate cancer risk: Mendelian randomization study in a population-based cohort

BACKGROUND: Epidemiological studies have observed a positive association between an earlier age at sexual development and prostate cancer, but markers of sexual maturation in boys are imprecise and observational estimates are likely to suffer from a degree of uncontrolled confounding. To obtain caus...

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Detalles Bibliográficos
Autores principales: Bonilla, Carolina, Lewis, Sarah J., Martin, Richard M., Donovan, Jenny L., Hamdy, Freddie C., Neal, David E., Eeles, Rosalind, Easton, Doug, Kote-Jarai, Zsofia, Al Olama, Ali Amin, Benlloch, Sara, Muir, Kenneth, Giles, Graham G., Wiklund, Fredrik, Gronberg, Henrik, Haiman, Christopher A., Schleutker, Johanna, Nordestgaard, Børge G., Travis, Ruth C., Pashayan, Nora, Khaw, Kay-Tee, Stanford, Janet L., Blot, William J., Thibodeau, Stephen, Maier, Christiane, Kibel, Adam S., Cybulski, Cezary, Cannon-Albright, Lisa, Brenner, Hermann, Park, Jong, Kaneva, Radka, Batra, Jyotsna, Teixeira, Manuel R., Pandha, Hardev, Lathrop, Mark, Davey Smith, George
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2016
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4820939/
https://www.ncbi.nlm.nih.gov/pubmed/27044414
http://dx.doi.org/10.1186/s12916-016-0602-x
Descripción
Sumario:BACKGROUND: Epidemiological studies have observed a positive association between an earlier age at sexual development and prostate cancer, but markers of sexual maturation in boys are imprecise and observational estimates are likely to suffer from a degree of uncontrolled confounding. To obtain causal estimates, we examined the role of pubertal development in prostate cancer using genetic polymorphisms associated with Tanner stage in adolescent boys in a Mendelian randomization (MR) approach. METHODS: We derived a weighted genetic risk score for pubertal development, combining 13 SNPs associated with male Tanner stage. A higher score indicated a later puberty onset. We examined the association of this score with prostate cancer risk, stage and grade in the UK-based ProtecT case-control study (n = 2,927), and used the PRACTICAL consortium (n = 43,737) as a replication sample. RESULTS: In ProtecT, the puberty genetic score was inversely associated with prostate cancer grade (odds ratio (OR) of high- vs. low-grade cancer, per tertile of the score: 0.76; 95 % CI, 0.64–0.89). In an instrumental variable estimation of the causal OR, later physical development in adolescence (equivalent to a difference of one Tanner stage between pubertal boys of the same age) was associated with a 77 % (95 % CI, 43–91 %) reduced odds of high Gleason prostate cancer. In PRACTICAL, the puberty genetic score was associated with prostate cancer stage (OR of advanced vs. localized cancer, per tertile: 0.95; 95 % CI, 0.91–1.00) and prostate cancer-specific mortality (hazard ratio amongst cases, per tertile: 0.94; 95 % CI, 0.90–0.98), but not with disease grade. CONCLUSIONS: Older age at sexual maturation is causally linked to a reduced risk of later prostate cancer, especially aggressive disease. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s12916-016-0602-x) contains supplementary material, which is available to authorized users.

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