"It's certainly concerning, and certainly gives pause if one were to say e-cigarettes were safe and could be used by all people without consequences". Tang and colleagues found that the solvent alone does not cause damage to the DNA, but exposure to nicotine and the solvent caused the same damage as exposure to nicotine alone.
It was found that they had higher levels of DNA damage in the heart, bladder, and lungs than those breathing normal filtered air. Norman states, "this study shows us that e-cigarettes should work as part of a supply reduction strategy; increase the price discrepancy between tobacco to harm reduction products like e-cigarettes, decrease tobacco availability and increase harm reduction options".
Dr Mehmet Kesimer, who led the study said: "There is confusion about whether e-cigarettes are "safer" than cigarettes because the potential adverse effects of e-cigarettes are only beginning to be studied".
The next step of the research is underway, in which mice are exposed to nicotine and e-cigarette vapor long-term to see if they actually develop cancer or heart disease, Tang added. "But compared to smoking, the evidence so far shows they are less harmful", it said in statement. NNAL, another member of the nitrosamine family that damaged the smoking mice's DNA, was found to be reduced by 97% in E-cigarette smokers as opposed to tobacco smokers in another recent study. He also chairs the American Society of Clinical Oncology's Cancer Prevention Committee.
Pakistan condemns terrorist attack on army camp in Kabul
He insisted, however that "the attack was against an army unit providing security for the academy and not the academy itself". Afghanistan accuses Pakistan of providing safe havens to terrorists who carry out attacks in the war-torn country.
As the authors admit, though, tobacco smoke is chock full of other nasty chemicals that can cause cancer along with other health problems, such as emphysema.
Experiments conducted on mice and cultured human cells show that nicotine in e-cigarette vapors may cause changes in the DNA that may elevate cancer risk. That's the verdict of a new study published this week in Proceedings of the National Academy of Sciences that examined how nicotine inhalation without burning tobacco affects genetic material.
They concluded that men who smoke a cigarette a day have 46% of the increased risk of heart disease and 41% of stroke risk for those who smoke a pack a day.
Cancer research groups, however, were quick to warn against fearmongering and point to previous research indicating that e-cigarettes are far less harmful than smoking.