E-cigarettes can cause lung cancer and potentially bladder cancer in mice, leading researchers to believe that the popular cigarette alternative is dangerous for humans as well.
A study published Monday in the Proceedings of the National Academy of Sciences is the first to definitively link vaping nicotine to cancer, although it is unclear how carcinogenic e-cigarette use could be for humans.
Researchers found that the vapors from e-cigarettes caused damage in the lungs and bladder, as well as inhibited DNA repair in the lungs. Of 40 mice exposed to nicotine through vaping over 54 weeks, 22.5 percent developed lung cancer and 57.5 percent developed precancerous lesions on the bladder.
None of the 20 mice that were exposed to vape without nicotine developed cancer.
The amount of vapor the mice were exposed to was equivalent to what a human would inhale if they used e-cigarettes regularly for around three to six years, although the mice were not inhaling the vapor as deeply as humans would. Researchers also used a small number of mice more likely to develop cancer over their lifetime.
The study’s lead researcher said the results highlight the need for research on the connection between e-cigarettes and cancer in humans.
🔦 E-cigarette use has been linked to nearly 20 deaths and more than 1,000 illnesses.