Related Experiment Video
Updated: Mar 30, 2026
08:16
Stereotaxic Infusion of Oligomeric Amyloid-beta into the Mouse Hippocampus
Published on: June 17, 2015
19.4K
Acyl Ghrelin Improves Synapse Recovery in an In Vitro Model of Postanoxic Encephalopathy
Irina I Stoyanova1, Jeannette Hofmeijer2,3, Michel J A M van Putten2,4
1Department of Clinical Neurophysiology, Faculty of Science and Technology, University of Twente, Building Carré 3714, P.O. Box 217, 7500 AE, Enschede, The Netherlands. stoyanovai@yahoo.co.uk.
Molecular Neurobiology
|November 7, 2015
Summary
Ghrelin treatment significantly improved synaptic density in cultured neurons after hypoxic injury. This suggests ghrelin may offer therapeutic potential for postanoxic encephalopathy.
Area of Science:
- Neuroscience
- Cell Biology
Background:
- Comatose patients post-cardiac arrest often suffer poor prognoses due to postanoxic encephalopathy.
- Existing neuroprotective agents have shown limited efficacy in treating this condition.
Purpose of the Study:
- To investigate synaptic damage in neuronal networks following severe hypoxia.
- To evaluate the neuroprotective potential of ghrelin in mitigating hypoxia-induced synaptic damage.
Main Methods:
- Cultured neuronal networks were subjected to 6 hours of severe hypoxia.
- Following reoxygenation, cultures were treated with ghrelin or served as controls.
- Synaptic density was assessed using immunocytochemistry for the synaptophysin marker.
Main Results:
- Hypoxia caused a significant decline in synapse density, with partial recovery upon reoxygenation.
- Synaptic vulnerability varied by neuron size, with larger and smaller neurons being more susceptible.
- Ghrelin treatment robustly increased synapse density across all neuronal subtypes compared to controls.
Conclusions:
- Exogenous ghrelin demonstrates a significant positive impact on cortical synapse recovery after hypoxic insult.
- Ghrelin and its analogs may hold therapeutic promise for treating postanoxic encephalopathy.
