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Impact of Magnesium on Oxytocin Receptor Function
Vimala N Bharadwaj1, Justin Meyerowitz1, Bende Zou2
1Department of Anesthesiology, Perioperative and Pain Medicine, School of Medicine, Stanford University, Palo Alto, CA 94304, USA.
Pharmaceutics
|May 28, 2022
Summary
Magnesium enhances oxytocin receptor (OTR) efficacy in reducing migraine pain. Supplementing oxytocin (OT) with magnesium may improve its effectiveness for headaches and other OTR-mediated processes.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Intranasal oxytocin (OT) alleviates migraine headaches via oxytocin receptor (OTR) activation.
- Magnesium ion (Mg2+) concentration is crucial for OTR activation; low serum Mg2+ predicts migraine.
- The study investigates Mg2+ impact on OT-OTR binding efficacy.
Purpose of the Study:
- To determine the functional impact of magnesium ion concentration on oxytocin-OTR binding efficacy.
- To assess if magnesium enhances oxytocin's therapeutic effects in a migraine model.
Main Methods:
- Current clamp recordings of rat trigeminal ganglia (TG) neurons to measure OT-induced neuronal excitability changes with varying Mg2+ levels.
- Assessment of intranasal OT-induced craniofacial analgesia in rats, with and without Mg2+ supplementation.
Main Results:
- Oxytocin alone dose-dependently reduced TG neuron excitability.
- The addition of 1.75 mM Mg2+ significantly enhanced OT's hyperpolarizing effect on TG neurons.
- Mg2+ significantly potentiated OT-induced craniofacial analgesia in rats.
Conclusions:
- Oxytocin efficacy may be limited by low ambient magnesium levels.
- Supplementation with Mg2+ could enhance OT formulations for headache pain relief.
- Magnesium may improve the efficacy of OT for other OTR-dependent processes.
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