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Does my mouse have Alzheimer's disease?
J C Dodart1, C Mathis, K R Bales
1Neuroscience Discovery Research, Eli Lilly and Company, Indianapolis, IN 46285, USA. jcdodart@lilly.com
Genes, Brain, and Behavior
|July 30, 2003
Summary
Transgenic mouse models offer valuable insights into Alzheimer's disease (AD) pathogenesis, exhibiting AD-like neuropathology and behaviors. However, no single model perfectly replicates human AD, presenting challenges in translational research.
Area of Science:
- Neuroscience
- Genetics
- Pathology
Background:
- Alzheimer's disease (AD) research benefits from small animal models mimicking its neuropathological and behavioral features.
- Genetic discoveries have led to transgenic (tg) mice overexpressing familial AD-related genes.
Purpose of the Study:
- To critically review the neuropathology and behavioral phenotypes of transgenic mice expressing human amyloid precursor protein (APP) transgenes.
- To assess the utility and limitations of these tg mouse models for studying Alzheimer's disease.
Main Methods:
- Review of existing literature on transgenic mouse models of Alzheimer's disease.
- Analysis of neuropathological hallmarks (amyloid deposits, neuritic plaques, gliosis, neurodegeneration) and behavioral deficits (memory impairment) in tg mice.
- Comparison of phenotypes in tg mice with human AD.
Main Results:
- Several tg mouse models exhibit AD-like features, including amyloid pathology and cognitive deficits.
- Significant differences persist between tg mouse models and human AD neuropathology and behavior.
- No single tg mouse model fully recapitulates the complexity of Alzheimer's disease.
Conclusions:
- Transgenic mice expressing human APP transgenes are valuable tools for investigating AD pathogenesis.
- Challenges remain in translating findings from tg mouse models to human AD due to observed discrepancies.
- Further research is needed to identify which aspects of tg mouse phenotypes are most relevant to human Alzheimer's disease.