Chlamydia pneumoniae Linked to Alzheimer's

A study led by Cedars-Sinai Medical Center, published in Nature Communications, has discovered a link between the common bacterium Chlamydia pneumoniae and Alzheimer s disease. The research indicates that Chlamydia pneumoniae, known for causing pneumonia and sinus infections, can persist in the eye and brain, exacerbating Alzheimer's. Higher levels of the bacterium were found in the retinas and brains of individuals with Alzheimer's, particularly those with the Apolipoprotein E gene variant. The bacterium triggers immune responses, inflammation, nerve cell death, and amyloid-beta production, accelerating disease progression. This discovery suggests potential interventions such as inflammation-limiting therapies and early antibiotic treatment, and supports retinal imaging as a noninvasive method for early Alzheimer's detection.