Article (Scientific journals)
Inflammatory processes in Alzheimer's disease.
HENEKA, Michael; O'Banion, M Kerry
2007In Journal of Neuroimmunology, 184 (1-2), p. 69 - 91
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Keywords :
Anti-Inflammatory Agents; Inflammation Mediators; Animals; Anti-Inflammatory Agents/pharmacology; Anti-Inflammatory Agents/therapeutic use; Apoptosis; Humans; Inflammation Mediators/metabolism; Neuroglia/metabolism; Neuroglia/pathology; Neurons/metabolism; Neurons/pathology; Alzheimer Disease/immunology; Alzheimer Disease/pathology; Alzheimer Disease/physiopathology; Inflammation/drug therapy; Inflammation/etiology; Amyloid; Astrocyte; Cytokine; Innate immunity; Microglia; Neurodegeneration; Immunology and Allergy; Immunology; Neurology; Neurology (clinical)
Abstract :
[en] Generation and deposition of amyloid beta peptides and neurofibrillary tangle formation are key mechanisms involved in AD pathogenesis. Recent evidence suggests that inflammatory mechanisms represent a third component which, once initiated by degeneration, may significantly contribute to disease progression and chronicity. Various neuroinflammatory mediators including complement activators and inhibitors, chemokines, cytokines, radical oxygen species and inflammatory enzymes are generated and released by microglia, astrocytes and neurons. Degeneration of aminergic brain stem nuclei such as the locus ceruleus and the nucleus baslis of Meynert may facilitate the occurrence of inflammation in their respective projection areas given the antiinflammatory and neuroprotective action of their key products norepinephrine and acetylcholine. While inflammation has been thought to arise secondary to degeneration, recent experiments demonstrated that inflammatory mediators may stimulate APP processing by upregulation of beta secretase 1 and therefore are able to establish a vicious cycle. Despite the fact that some aspects of inflammation may even exert protective effects to bystander neurons, antiinflammatory treatment strategies should therefore be considered. Non-steroidal antiinflammatory drugs have been shown to reduce the risk and delay the onset to develop AD. However, the precise molecular mechanism underlying this effect is still being debated. Several mechanisms including inhibition of cyclooxygenase 2, gamma secretase or activation of the peroxisome proliferator activated receptor gamma may alone or, more likely, in concert account for the epidemiologically observed protection.
Disciplines :
Neurology
Author, co-author :
HENEKA, Michael  ;  Department of Neurology, Molecular Neurology Unit, University of Münster, Mendelstrasse 7, D-48149, Münster, Germany. heneka@uni-muenster.de
O'Banion, M Kerry;  Department of Neurology, Molecular Neurology Unit, University of Münster, D-48149 Münster, Germany ; Departments of Neurobiology and Anatomy and of Neurology, University of Rochester, Rochester, NY, United States
External co-authors :
yes
Language :
English
Title :
Inflammatory processes in Alzheimer's disease.
Publication date :
March 2007
Journal title :
Journal of Neuroimmunology
ISSN :
0165-5728
eISSN :
1872-8421
Publisher :
Elsevier BV, Netherlands
Volume :
184
Issue :
1-2
Pages :
69 - 91
Peer reviewed :
Peer Reviewed verified by ORBi
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