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Estrogen protects primary cortical neurons from glutamate toxicity
C A Singer1, K L Rogers, T M Strickland
1Department of Pharmacology, University of Washington, Seattle 98195-7280, USA. carrey@u.washington.edu
Neuroscience Letters
|July 5, 1996
Summary
Estrogen protects brain cells from glutamate damage. This neuroprotection involves classical steroid hormone receptors, suggesting a potential therapeutic target for excitotoxicity.
Area of Science:
- Neuroscience
- Endocrinology
- Cell Biology
Background:
- Estrogen influences neuronal development and survival.
- Excitatory neurotransmitters like glutamate can cause neuronal damage.
Purpose of the Study:
- To investigate estrogen's neuroprotective effects against glutamate toxicity in primary cortical neurons.
- To explore the mechanism underlying estrogen's neuroprotection.
Main Methods:
- Primary cortical neurons were pretreated with 17 beta-estradiol.
- Neurons were exposed to glutamate to induce toxicity.
- Lactate dehydrogenase (LDH) release was measured to assess cell viability.
- The effect of tamoxifen, an anti-estrogen, was evaluated.
Main Results:
- 17 beta-estradiol significantly reduced LDH release, indicating neuroprotection.
- Other steroids like progesterone and dihydrotestosterone did not show significant protective effects.
- Tamoxifen blocked the neuroprotective effects of 17 beta-estradiol.
Conclusions:
- Estrogen confers significant neuroprotection against glutamate excitotoxicity in cortical neurons.
- The involvement of tamoxifen suggests a classical steroid hormone receptor mediates this protective effect.
- Estrogen neuroprotection may be a viable therapeutic strategy for conditions involving glutamate excitotoxicity.