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Updated: Aug 15, 2026
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Ovariectomy and 17β-estradiol Replacement in Rats and Mice: A Visual Demonstration
Published on: June 7, 2012
Estradiol Replacement Modulates Synaptic Transmission-Related Proteins in the Hippocampus of Ovariectomized Rats: An
Amanda Paula Pedroso1, Adriana Pereira Souza1, Guilherme Araújo Câmara1
1Department of Physiology, Universidade Federal de São Paulo, Escola Paulista de Medicina, São Paulo, São Paulo, Brazil.
Journal of Neurochemistry
|August 14, 2026
Summary
Estradiol influences the rat hippocampus proteome, impacting energy metabolism and neuron function post-ovariectomy. This research offers new insights into menopause effects on the brain and potential therapeutic targets.
Area of Science:
- Neuroscience
- Endocrinology
- Proteomics
Background:
- Postmenopause is associated with hormonal changes affecting brain function, particularly the hippocampus.
- The precise mechanisms of estradiol's influence on the hippocampus remain incompletely understood.
Purpose of the Study:
- To investigate the effects of estradiol on the rat hippocampus proteome following ovariectomy-induced menopause.
- To identify specific proteins and pathways affected by estradiol replacement.
Main Methods:
- Ovariectomy and sham surgery in female Wistar rats, with a subgroup receiving estradiol replacement.
- Mass spectrometry-based proteomics (data independent acquisition) of hippocampal tissue.
- Bioinformatics analysis of differentially expressed proteins for pathway enrichment.
Main Results:
- Ovariectomy and estradiol replacement modulated 49 hippocampal proteins.
- Key affected pathways include energy metabolism (glycolysis, oxidative phosphorylation, oxidative stress response) and neuron projection (cytoskeleton, vesicle transport, synaptic transmission).
- Estradiol impacts mitochondrial dynamics, lipid metabolism, intracellular trafficking, dendritic and synaptic transmission, and brain plasticity.
Conclusions:
- Estradiol significantly alters the hippocampal proteome in a menopausal rat model.
- Identified protein changes provide novel insights into menopause-related brain alterations.
- Findings may inform future drug development for postmenopause symptoms.
