3 days popular7 days popular1 month popular3 months popular

Infection May Cause Chronic Inflammation In The Brain, Leading The Way To Alzheimer’s Disease

Research published in Biomed Central’s open access Journal of Neuroinflammation suggests that can predispose the brain to develop ’s disease.

To date it has been difficult to pin down the role of inflammation in Alzheimer’s disease (AD), especially because trials of NSAIDs appeared to have conflicting results. Although the ADAPT (The Alzheimer`s Disease Anti-inflammatory Prevention Trial) trial was stopped early, recent results suggest that NSAIDs can help people with early stages of AD but that prolonged treatment is necessary to see benefit.

Researchers from the University of Zurich, in collaboration with colleagues from the and University of Bern investigated what impact challenges (similar to having a severe ) would have on the development of AD in . Results showed that a single infection before birth (during late gestation) was enough to induce long-term neurological changes and significant memory problems at old age.

These mice had a persistent increase in inflammatory cytokines, increased levels of amyloid precursor protein (APP), and altered cellular localization of Tau. If this immune system challenge was repeated during adulthood the effect was strongly exacerbated, resulting in changes similar to those seen for pathological aging.

Dr Irene Knuesel who led this research explained, “The AD-like changes within the brain of these mice occurred without an increase in amyloid β (Aβ). However, in mice genetically modified to produce the human version of Aβ, the viral-like challenge drastically increased the amount of Aβ at precisely the sites of inflammation-induced APP deposits. Based on the similarity between these APP/A aggregates in mice and those found in human AD, it seems likely that chronic inflammation due to infection could be an early event in the development of AD.

Source

Systemic immune challenges trigger and drive Alzheimer-like neuropathology in mice
Dimitrije Krstic, Amrita Madhusudan, Jana Doehner, Prisca Vogel, Tina Notter, Claudine Imhof, Abigail Manalastas, Martina Hilfiker, Sandra Pfister, Cornelia Schwerdel, Carsten Riether, Urs Meyer and Irene Knuesel
Journal of Neuroinflammation (in press)
BioMed Central