Chronic infection can cause slow progressive dementia, cortical atrophy and amyloid deposition in the atrophic
form of general paresis. Due to the fact that specific bacterial ligands can increase the expression of proinflammatory
molecules that can activate innate and adaptive immune systems, inflammation may play a significant role in the
pathogenesis of Alzheimer’s disease (AD). Furthermore, there is a significant association between AD and various types
of spirochete. Periodontitis is a prevalent and persistent peripheral infection that is associated with gram-negative
anaerobic bacteria and is capable of showing localized and systemic infections in the host. Periodontal disease related
pathogens and their inflammatory products contribute to systemic inflammation and the pathogenesis of AD. In this minireview,
we propose a hypothetical link between periodontitis, type 2 diabetes and AD. We also present the possible
mechanistic links between periodontitis-related inflammation, type 2 diabetes and AD. Since this condition is treatable,
periodontitis may be a readily-modifiable risk factor for AD.
Keywords: Periodontal disease, Alzheimer’s disease, inflammation, dementia.
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