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Glucocorticoids and the ageing hippocampus.
C Hibberd1, J L Yau, J R Seckl
1Molecular Medicine Centre, University of Edinburgh, Western General Hospital, UK.
Journal of Anatomy
|February 24, 2001
Summary
Aging leads to cognitive impairments in humans and mammals, often linked to hippocampal dysfunction. Lifetime exposure to glucocorticoids, particularly elevated levels, is strongly associated with age-related cognitive decline.
Area of Science:
- Neuroscience
- Gerontology
- Endocrinology
Background:
- Cognitive impairments affect approximately 30% of aging human and mammalian populations.
- Hippocampal dysfunction is a common factor in age-related cognitive decline.
- The hippocampus plays a crucial role in memory and stress axis regulation.
Purpose of the Study:
- To review the relationship between lifetime glucocorticoid exposure and hippocampal impairment.
- To synthesize evidence linking hypercortisolemia to cognitive dysfunction in aging.
- To discuss potential interventions for age-related cognitive decline.
Main Methods:
- Literature review of studies on glucocorticoids and hippocampal function.
- Analysis of human and rodent data on aging and cognitive impairment.
- Examination of the link between hypercortisolemia and cognitive deficits.
Main Results:
- Strong evidence associates hypercortisolemia in aged individuals with subsequent cognitive dysfunction.
- Data from human and rodent studies support the link between glucocorticoids and hippocampal impairment.
- Glucocorticoid exposure is a significant factor in age-related cognitive decline.
Conclusions:
- Lifetime exposure to glucocorticoids, especially elevated levels, is strongly linked to hippocampal impairment and cognitive dysfunction in aging.
- Pharmacological and behavioral interventions may mitigate these effects.
- Further research is warranted to explore therapeutic strategies.