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Tuesday, December 6, 2016

Smoking provokes dangerous changes in DNA


A group of researchers representing Harvard medical school, found that Smoking has a significant impact on the structure of human DNA. However, even in case the smoker from harmful habits refuse, the recovery of many molecular mechanisms will take years and for some even decades.


photo: pixabay.com

The focus of the scientists were in the process of methylation, that is, modification of DNA without changing the nucleotide sequence. This process provoked, including Smoking, can lead to the fact that some genes start to work or otherwise reduce their activity. In turn, such changes pose a significant risk to human health, increasing the risk of many diseases, for example cardiovascular disease.

The researchers collected information on about 16 thousand people took part in the earlier studies, conducted from 1971. As a result, experts came to the conclusion that Smoking has an indirect influence on the function and activity seven thousand genes. The fact that most of the damage was restored, was required five years, however, 19 genes in many cases continued to operate “incorrectly” for 30 years after the failure of a person Smoking.

Experts note that they consider equally important both the observations made in the course of the study and the fact that Smoking has a very significant impact on DNA, and that some consequences can be observed even decades after the smoker ceases to be so.

In July this year, a group of researchers from University of Gothenburg, found that Smoking, along with the sedentary lifestyle represents one of the main causes of early death. Another study, conducted by experts from Helsinki University has shown that Smoking can increase the risk of an extremely dangerous form of stroke — subarachnoid hemorrhage. And last September, scientists from the University of Athens understood why people are abruptly gaining weight, quit Smoking — as it turned out, quitting bad habits “includes” the work of the special hormone, whose activity is suppressed by Smoking.

source

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