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Evidence for glial-mediated inflammation in aged APP(SW) transgenic mice
W C Benzing1, J R Wujek, E K Ward
1Gliatech Inc., Cleveland, OH 44122, USA. benzingw@gliatech.com
Neurobiology of Aging
|February 16, 2000
Summary
Inflammation markers like interleukin-1beta and tumor necrosis factor alpha were found in the brains of Alzheimer
Area of Science:
- Neuroscience
- Immunology
- Pathology
Background:
- Chronic inflammation involving cytokines like interleukin-1beta, tumor necrosis factor alpha, and interleukin-6 is implicated in Alzheimer's disease (AD) neurodegeneration.
- Glial cells are key players in the inflammatory response within the brain.
Purpose of the Study:
- To investigate the presence of specific inflammation markers in the brains of Tg2576 transgenic mice, an established model for AD.
- To determine if Tg2576 mice exhibit the inflammatory pathology characteristic of human Alzheimer's disease.
Main Methods:
- Immunohistochemistry was used to detect interleukin-1beta, tumor necrosis factor alpha, and interleukin-6.
- Thioflavine staining was employed to identify fibrillar amyloid-beta (Abeta) deposits.
- Microglia and astrocytes surrounding Abeta deposits were analyzed.
Main Results:
- Interleukin-1beta and tumor necrosis factor alpha-immunopositive microglia were found associated with fibrillar Abeta deposits.
- Interleukin-6 immunoreactive astrocytes were observed surrounding fibrillar Abeta deposits.
- Tg2576 mice demonstrated key features of neuroinflammation seen in Alzheimer's disease.
Conclusions:
- Tg2576 transgenic mice exhibit inflammatory pathology mirroring that of Alzheimer's disease.
- These mice serve as a valuable model for studying the role of inflammation in Alzheimer's disease pathogenesis.
- The findings support the link between glial-mediated inflammation and neurodegeneration in AD.