Smoking May Be in Your Genes

(HealthDay News) -- For some people, quitting smoking could be especially difficult because their dependence may be explained in part by genetics, three new studies suggest.

One of the reports, part of a trio of findings published online April 25 in Nature Genetics, found three genetic regions that were associated with the number of cigarettes smoked per day.

"One region was associated with smoking initiation, and one variant was associated with smoking cessation," said study co-author Helena Furberg, a research assistant professor at the University of North Carolina. "The genetic variants on chromosome 15 that were associated with heavy smoking lie within a region that contains nicotine receptor genes, which other scientists have previously associated with nicotine dependence and lung cancer." Read more...

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