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Smoking and Alcohol Cause Trouble for the Brain

by Colleen Fleiss on March 3, 2019 at 6:47 PM
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Smoking and Alcohol Cause Trouble for the Brain

Joint use of tobacco and alcohol was found to increase neural damage in particular brain regions, revealed study on rats. The findings of the study are reported in ACS Chemical Neuroscience.

Along with many other harmful health consequences, smoking tobacco causes chemical changes, oxidative stress and inflammation in the brain. Excessive alcohol use can have similar effects. Surprisingly, however, very few studies have examined the combined impact of smoking and alcohol on the brain.

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Therefore, studying the combined effects of the two drugs on the central nervous system could yield valuable insights. But most previous studies have examined the consequences of one or the other in isolation.

The researchers treated rats with alcohol, tobacco smoke or both twice a day for 28 days and then compared their brains with control animals that didn't receive either substance. They found that the combined alcohol and smoking treatment increased the level of reactive oxygen species in the hippocampus compared with control animals or rats given tobacco smoke alone.
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In all of the brain areas studied, combined alcohol and smoking increased the levels of specific pro-inflammatory cytokines more than either treatment alone. And in the striatum and frontal cortex, rats with both treatments showed lower levels of brain-derived neurotrophic factor, a growth factor that helps existing neurons survive and stimulates the growth of new ones. These results suggest that alcoholics who smoke could be at additional risk for neural damage, the researchers say.

Source: Eurekalert
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