Tumour necrosis factor-alpha (TNF-alpha) is a critical component of the brain's immune system and normally finely regulates the transmission of neural impulses in the brain. Elevated levels of TNF-alpha in the brains of people with Alzheimer disease could interfere with this regulation so researchers injected a drug called etanercept into Alzheimer sufferers. Family members, neurologists and other independent observers all noticed a rapid and significant improvement in people's language abilities after the injection.
You can find out more about this research at
http://psychcentral.com/news/2008/07/21/new-treatment-of-alzheimers-brings-rapid-results/2636.html
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