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Smoking damages DNA

11.10.2016

Scientists from the Harvard School of Medicine have found that smoking disrupts the structure of DNA and some of the violations do not go away even after a person refuses nicotine.

Researchers have determined that smoking affects the process of methylation - changes in the DNA molecule that can suppress the activity of genes or affect their functions. Such failures often lead to cancer, heart disease, and other serious health problems. The effects of smoking can affect molecular mechanisms for more than 30 years.

Scientists studied blood samples from 16 people who had previously participated in various studies. It turned out that in smokers the methylation process changed, and this affected more than seven thousand genes, that is, a third of all human genes known to science. If a person quit smoking, most of the gene changes returned to normal after about five years. But changes in 19 genes, including a gene associated with the occurrence of lymphoma, did not disappear even after 30 years.

Every year, more than six million people die from smoking-related diseases (cancer, heart and lung diseases) worldwide.

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