Cognitive Impact of Glucocorticoid Regulation in Aging
Summary
The cognitive decline accompanying ageing is intimately linked to the regulation of glucocorticoids, hormones that mediate stress responses and neural plasticity. Within the brain, active cortisol (or corticosterone in rodents) and its inactive forms are interconverted by enzymes such as 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1), which regenerates active glucocorticoids in regions vital for cognition, notably the hippocampus and prefrontal cortex. Age-associated elevation of 11β-HSD1 amplifies local glucocorticoid exposure, precipitating synaptic atrophy, dendritic remodelling and impaired long-term potentiation. Altered signalling through glucocorticoid receptors further triggers neuroinflammatory cascades and mitochondrial dysfunction, undermining memory formation and executive processes. Insights from animal models and early clinical trials of selective 11β-HSD1 inhibitors offer a promising route to normalise intracerebral hormone levels, preserve neuronal integrity and ameliorate cognitive deficits in the ageing population.
Research from Nature Portfolio
Recent studies have profiled the distribution of adrenal corticosteroids across tissues in chronically stressed mice, revealing that active glucocorticoid levels within the brain do not simply reflect systemic concentrations but are shaped by regional metabolism. Analyses of corticosterone and its inactive metabolites in brain, liver and peripheral organs demonstrate that tissue-specific enzyme activities create distinct local hormone environments. These observations emphasise the role of intracerebral glucocorticoid regulation in modulating neural circuits under stress and suggest that alterations in local steroid ratios may contribute to cognitive vulnerability during ageing.
Cognitive Impact of Glucocorticoid Regulation in Aging publication trend
The graph below shows the total number of articles in cognitive impact of glucocorticoid regulation in aging across all publications each year (not limited to Nature Index journals).
Technical terms
Glucocorticoids: Steroid hormones that regulate metabolism, stress responses and synaptic function in the brain.
11β-Hydroxysteroid dehydrogenase type 1 (11β-HSD1): An intracellular enzyme that converts inactive steroid metabolites into active glucocorticoids within target tissues.
Hippocampus: A brain region essential for learning and memory that is highly sensitive to glucocorticoid levels.
Glucocorticoid receptor (GR): An intracellular receptor that mediates the genomic and non-genomic actions of active glucocorticoids.
References
- 11β‐Hydroxysteroid dehydrogenase and the brain: Not (yet) lost in translation. Journal of Internal Medicine (2023).
- Profiling of adrenal corticosteroids in blood and local tissues of mice during chronic stress. Scientific Reports (2023).
- Age-related increase in the expression of 11β-hydroxysteroid dehydrogenase type 1 in the hippocampus of male rhesus macaques. Frontiers in Aging Neuroscience (2024).
- Selection and early clinical evaluation of the brain‐penetrant 11β‐hydroxysteroid dehydrogenase type 1 (11β‐HSD1) inhibitor UE2343 (Xanamem™). British Journal of Pharmacology (2017).
- Role of 11β-Hydroxysteroid Dehydrogenase and Mineralocorticoid Receptor on Alzheimer’s Disease Onset: A Systematic Review. International Journal of Molecular Sciences (2025).
- Short-term inhibition of 11β-hydroxysteroid dehydrogenase type 1 reversibly improves spatial memory but persistently impairs contextual fear memory in aged mice. Neuropharmacology (2014).
- Decreased Npas4 and Arc mRNA Levels in the Hippocampus of Aged Memory‐Impaired Wild‐Type But Not Memory Preserved 11β‐HSD1 Deficient Mice. Journal of Neuroendocrinology (2016).
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