Washington: Smoking not only harms your lungs, it can also wreak havoc to the brain, according to a new study in mice. Signs of Alzheimer`s disease increased in the brains of animals that breathed cigarette smoke for four months, scientists report February 19 in Nature Communications. Researchers said the relationship between smoking and Alzheimer`s in people is murky. Some evidence from the 1990s suggested that smoking actually protected people against Alzheimer`s, presumably by stimulating nicotine-detecting brain cells. More recent studies have found that smoking ups the odds of the disease, `ScienceNews` reported. To see what cigarettes do to the brain, scientists led by Claudio Soto of the University of Texas Medical School at Houston turned to mice.
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