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Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology
Published on: March 23, 2011
Effects of aging and stress on hippocampal structure and function
1Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA.
Metabolism: Clinical and Experimental
|October 25, 2003
Summary
Brain aging affects cognition, with the hippocampus playing a key role. Age-related changes in the hypothalamic-pituitary-adrenal (HPA) axis and stress hormones like glucocorticoids may impact hippocampal function and cognitive decline.
Area of Science:
- Neuroscience
- Gerontology
- Endocrinology
Background:
- Aging leads to decline in body systems, increasing focus on brain aging and cognitive function.
- The hippocampus is crucial for cognition and stress response, making it central to understanding brain aging.
- Age-related cognitive decline negatively impacts quality of life.
Purpose of the Study:
- To describe age-related changes in the hippocampus.
- To examine the role of the hypothalamic-pituitary-adrenal (HPA) axis in hippocampal aging.
- To investigate if cumulative stress and glucocorticoid exposure contribute to hippocampal aging.
Main Methods:
- Review of age-related changes in hippocampal structure and function.
- Examination of alterations in hypothalamic-pituitary-adrenal (HPA) axis secretory patterns with aging.
- Analysis of the impact of glucocorticoids on hippocampal integrity and cognition.
Main Results:
- The aging hippocampus shows no generalized loss of cells or synapses, but may undergo atrophy.
- Age-related cognitive impairments are linked to neurobiological alterations beyond cell loss.
- Hypothalamic-pituitary-adrenal (HPA) axis dysfunction and excessive glucocorticoids can occur with aging but are not inevitable.
Conclusions:
- Age-related cognitive decline is associated with neurobiological changes in the hippocampus, not just cell loss.
- The hippocampus retains plasticity, offering potential for interventions.
- Pharmacological, nutritional, or lifestyle strategies may combat age-related cognitive decline.
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