More Evidence Links Genetics And Smoking

Scientists studying the DNA marker profiles between smokers and non-smokers have found several genetic variants that are associated with key smoking behaviors. In a new Nature Genetics paper, the international research team reported that three genetic regions are associated with the number of cigarettes smoked per day, one with smoking initiation and one with smoking cessation. The variants on chromosome 15 associated with heavy smoking lie within a region that contains nicotinic receptor genes, which other scientists have previously associated with nicotine dependence and lung cancer. read more

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