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Forgetting in obesity: The pregnenolone link
Luigi Bellocchio1, Giovanni Marsicano1
1INSERM, U1215 NeuroCentre Magendie, Endocannabinoids and Neuroadaptation, Bordeaux, France; University of Bordeaux, Bordeaux, France.
Cell Metabolism
|February 2, 2022
Summary
Obesity can cause cognitive dysfunction due to impaired production of the neurosteroid pregnenolone in the hypothalamus. This study reveals a key mechanism linking obesity, brain function, and metabolic health.
Area of Science:
- Neuroendocrinology
- Metabolic disorders
- Cognitive neuroscience
Background:
- Cognitive dysfunction is frequently observed in individuals with obesity and related metabolic conditions.
- The hypothalamus plays a crucial role in regulating metabolism and brain function.
Purpose of the Study:
- To investigate the role of neurosteroid production in the hypothalamus as a mechanism for obesity-induced cognitive impairment.
- To explore the link between impaired pregnenolone synthesis and cognitive deficits in obesity.
Main Methods:
- Utilized rodent models of obesity and analyzed patient data.
- Assessed neurosteroid levels, specifically pregnenolone, in the hypothalamus.
- Evaluated cognitive function in relation to metabolic status and neurosteroid production.
Main Results:
- Demonstrated impaired production of the neurosteroid pregnenolone in the hypothalamus of obese subjects.
- Established a correlation between reduced hypothalamic pregnenolone and cognitive dysfunction in both rodent models and human patients with obesity.
Conclusions:
- Impaired hypothalamic pregnenolone production is a significant mechanism contributing to cognitive impairment in obesity.
- Targeting neurosteroid synthesis in the hypothalamus may offer therapeutic strategies for cognitive deficits associated with metabolic disorders.
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