期刊
NEURON GLIA BIOLOGY
卷 3, 期 -, 页码 245-253出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S1740925X08000136
关键词
neurodegeneration; replicative senescence; Alzheimer's disease
Neuroinflammation resulting from chronic reactive microgliosis is thought to contribute to age-related neurodegeneration, as well as age-related neurodegenerative diseases, specifically Alzheimer's disease (AD). Support of this theory comes from studies reporting a progressive, age-associated increase in microglia with an activated phenotype. Although the underlying cause(s) of this microglial reactivity is idiopathic, an accepted therapeutic strategy for the treatment of AD is inhibition of microglial activation using anti-inflammatory agents. Although the effectiveness of anti-inflammatory treatment for AD remains equivocal, microglial inhibition is being tested as a potential treatment for additional neurodegenerative disorders including amyotrophic lateral sclerosis and Parkinson's disease. Given the important and necessary functions of microglia in normal brain, careful evaluation of microglial function in the aged brain is a necessary first step in targeting more precise treatment strategies for aging-related neurodegenerative diseases. Studies from our laboratory have shown multiple age-related changes in microglial morphology and function that are suggestive of cellular senescence. In this manuscript, we review current knowledge of microglia in the aging brain and present new, unpublished work that further supports the theory that microglia experience an age-related decline in proliferative function as a result of cellular senescence.
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