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Chronic inflammation in the brain leads the way to Alzheimer's disease

Date:
July 2, 2012
Source:
BioMed Central
Summary:
A new article suggests that chronic inflammation can predispose the brain to develop Alzheimer's disease.

Research published July 2 in Biomed Central's open access journal Journal of Neuroinflammation suggests that chronic inflammation can predispose the brain to develop Alzheimer'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 ETH Zurich and University of Bern investigated what impact immune system challenges (similar to having a severe viral infection) would have on the development of AD in mice. 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/Aƒ 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.


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Journal Reference:

  1. 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. Systemic immune challenges trigger and drive Alzheimer-like neuropathology in mice. Journal of Neuroinflammation, 2012 DOI: 10.1186/1742-2094-9-151

Cite This Page:

BioMed Central. "Chronic inflammation in the brain leads the way to Alzheimer's disease." ScienceDaily. ScienceDaily, 2 July 2012. <www.sciencedaily.com/releases/2012/07/120702134820.htm>.
BioMed Central. (2012, July 2). Chronic inflammation in the brain leads the way to Alzheimer's disease. ScienceDaily. Retrieved October 22, 2014 from www.sciencedaily.com/releases/2012/07/120702134820.htm
BioMed Central. "Chronic inflammation in the brain leads the way to Alzheimer's disease." ScienceDaily. www.sciencedaily.com/releases/2012/07/120702134820.htm (accessed October 22, 2014).

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