A study led by researchers at Madrid’s Complutense University and the Cajal Institute was conducted on patients who possess brain tissue infected with Alzheimer’s. The scientists first compared the brain tissue of patients who died from Alzheimer’s disease with that of healthy people who had died at a similar age. They studied the brain cell receptors as well as structures called microglia. The researchers found that diseased brain tissue had significantly reduced cannabinoid receptors. They later concluded that cannabinoids counteracted the activation of microglia and thus reduced inflammation.
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http://news.bbc.co.uk/2/hi/health/4286435.stm