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Craving the Sun? Twin Study Finds It May Be Genetic

MedicalResearch.com Interview with: Dr Mario Falchi Head of Bioinformatics for the School of Life Course Sciences Department of Twin Research & Genetic Epidemiology King’s College London MedicalResearch.com: What is the background for this study? Response: The relationship between sun exposure and health is a double-edged sword, on one side there is the beneficial effect of vitamin D production and on the other the increased risk of skin cancer, depending on length and frequency of exposure, and on the individual skin type. Despite public health campaigns, changing sun-seeking behaviour seems to be challenging for some people, even for those with a familial or personal history of skin cancer. Previous investigations have suggested that exposure to UV could be addictive.  MedicalResearch.com: What are the main findings? Response: We investigated the sun seeking behaviour of 2,500 twins from the TwinsUK cohort, finding that identical twins tend to share a more similar attitude towards sun exposure compared to fraternal twins. Sun seeking seems to be heritable and significantly influenced by genetics. To identify the genes involved, we performed a genome-wide association study of sun seeking behaviour in 260,000 volunteers from the UK Biobank and the US Nurses’ Health Studies and Health Professionals Follow-up Study, which highlighted five significantly-associated genetic loci. Read the full article