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Ovariectomy and 17β-estradiol Replacement in Rats and Mice: A Visual Demonstration
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[Aging and ovariectomy cause a decrease in brain glucose consumption in vivo in Wistar rats].

Raúl López-Grueso1, Consuelo Borrás, Juan Gambini

  • 1Departamento de Fisiología, Facultad de Medicina, Universidad de Valencia, Valencia, España.

Revista Espanola De Geriatria Y Gerontologia
|March 9, 2010
PubMed
Summary

Aging significantly decreases brain glucose metabolism in female rats. Ovariectomy further reduces cerebral glucose consumption, mirroring effects seen in older age, highlighting estrogen

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Gerontology

Context:

  • Female mammals exhibit greater longevity than males, suggesting underlying biological sex differences.
  • Estrogen's role in longevity is implicated, as ovariectomy in females diminishes survival advantages.
  • Understanding age-related changes in brain metabolism is crucial for addressing cognitive decline.

Purpose:

  • To investigate in vivo cerebral glucose metabolism in young and old female Wistar rats.
  • To evaluate the impact of ovariectomy on brain glucose uptake in these rats.

Summary:

  • Positron Emission Tomography (PET) with 18F-fluorodeoxyglucose (FDG) measured cerebral glucose uptake.
  • A significant decline in glucose consumption was observed in aged rats compared to young rats.

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  • Ovariectomy led to a significant reduction in brain glucose consumption, comparable to aging effects.

    • Impact:

    • Aging demonstrably impairs cerebral glucose metabolism.
    • Estrogen depletion via ovariectomy significantly reduces brain glucose consumption.
    • Findings suggest a link between estrogen levels and brain energy metabolism, relevant to aging and sex differences in longevity.