https://www.webmd.com/alzheimers/news/20190125/gum-disease-bacteria-found-in-alzheimers-brains
https://fox43.com/2019/01/25/gum-infection-could-be-linked-to-alzheimers-study-says/
Gum disease bacteria may play a role in Alzheimer's disease, researchers say.
They studied dead and living patients with diagnosed and suspected Alzheimer's and found bacteria associated with chronic gum disease in the brains of people with Alzheimer's, BBC News reported.
Tests on mice confirmed the bacteria, Porphyromonas gingivalis could migrate from the mouth to the brain and that a toxic protein they secrete (gingipain) destroyed brain neurons.
The bacteria also boosted production of amyloid beta, a component of brain plaques associated with Alzheimer's, BBC News reported.
Further tests on mice showed that drugs that block the toxic proteins produced by the bacteria stopped brain degeneration.
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