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Review
. 2023 Aug 21;35(1):99-120.
doi: 10.1515/revneuro-2023-0049. Print 2024 Jan 29.

Peripheral inflammation is a potential etiological factor in Alzheimer's disease

Ziyuan Li  1 , Hui Wang  1 , Yafu Yin  1
Affiliations
Review

Peripheral inflammation is a potential etiological factor in Alzheimer's disease

Ziyuan Li et al. Rev Neurosci. .

Abstract

Peripheral inflammation could constitute a risk factor for AD. This review summarizes the research related to peripheral inflammation that appears to have a relationship with Alzheimer's disease. We find there are significant associations between AD and peripheral infection induced by various pathogens, including herpes simplex virus type 1, cytomegalovirus, Epstein-Barr virus, human immunodeficiency virus, severe acute respiratory syndrome coronavirus 2, Porphyromonas gingivalis, Helicobacter pylori, and Toxoplasma gondii. Chronic inflammatory diseases are also reported to contribute to the pathophysiology of AD. The mechanisms by which peripheral inflammation affects the pathophysiology of AD are complex. Pathogen-derived neurotoxic molecule composition, disrupted BBB, and dysfunctional neurogenesis may all play a role in peripheral inflammation, promoting the development of AD. Anti-pathogenic medications and anti-inflammatory treatments are reported to decrease the risk of AD. Studies that could improve understanding the associations between AD and peripheral inflammation are needed. If our assumption is correct, early intervention against inflammation may be a potential method of preventing and treating AD.

Keywords: Alzheimer’s disease; amyloid; neuroinflammation; pathogen; peripheral inflammation.

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