Smoking Causes Long-Term Damage To Your DNA, Study Finds

Here’s one more reason to kick your smoking habit: A new study has found that cigarette smoking leads to disease-causing DNA damage that can last more than 30 years after a person quits. The study involved blood samples from more than 16,000 people, including current and former smokers and people who had never smoked. The researchers uncovered evidence of a “long-term signature” in tobacco users’ DNA that likely contributes to diseases associated with smoking such as lung cancer and heart disease, according to the report, which was published in the American Heart Association’s journal, Circulation: Cardiovascular Genetics. “Our study has found compelling evidence that smoking has a long-lasting impact on our molecular machinery,” said study author Roby Joehanese, an instructor and research scientist at Harvard Medical School and the Hebrew SeniorLife Institute for Aging Research, in a statement.  The study’s key focus was cigarettes’ effect on DNA methylation, which regulates gene expression. According to the researchers, methylation happened in genes linked to smoking-related diseases, such as cancers, osteoporosis, and lung and cardiovascular disorders. In all, about one-third of known genes in smokers were found affected. While most of these genes went back to normal levels five years after a person quit, changes in 19 genes ― including the TIAM2 gene, which is linked to lymphoma â€...
Source: Healthy Living - The Huffington Post - Category: Consumer Health News Source Type: news