A new study published in Scientific Reports shows that low levels of alcohol consumption may tamp down inflammation and help the brain clear away toxins, including those associated with Alzheimer’s disease.

The research focused on the glymphatic system, the brain’s unique cleaning process that was first described by the same researchers in 2012. They showed how cerebral spinal fluid (CSF) is pumped into brain tissue and flushes away waste, including the proteins beta amyloid and tau that are associated with Alzheimer’s disease and other forms of dementia. Subsequent research has shown that the glymphatic system is more active while we sleep, can be damaged by stroke and trauma, and improves with exercise.

The new study, which was conducted in mice, looked at the impact of both acute and chronic alcohol exposure.  When they studied the brains of animals exposed to high levels of alcohol over a long period of time, the researchers observed high levels of a molecular marker for inflammation, particularly in cells called astrocytes which are key regulators of the glymphatic system.  They also noted impairment of the animal’s cognitive abilities and motor skills.

Animals that were exposed to low levels of alcohol consumption, analogous to approximately 2 ½ drinks per day, actually showed less inflammation in the brain and their glymphatic system was more efficient in moving CSF through the brain and removing waste, compared to control mice who were not exposed to alcohol.  The low dose animals’ performance in the cognitive and motor tests was identical to the controls.

Paper: “Beneficial effects of low alcohol exposure, but adverse effects of high alcohol intake on glymphatic function.”

Reprinted from materials provided by the University of Rochester Medical Center

април 12, 2018