Modeling seizure networks in neuron-glia cultures using microelectrode arrays

Area of Science:

• Neuroscience
• Epilepsy Research
• In Vitro Modeling

Background:

• Epilepsy affects over 65 million globally, with 30% experiencing treatment-resistant seizures.
• Current research limitations include static snapshots of seizure networks, hindering understanding of their development.
• Intracranial electrocorticography (ECoG) studies suggest treatment failure relates to unaddressed seizure network components.

Purpose of the Study:

• To develop a novel in vitro microelectrode array (MEA) seizure model.
• To enable longitudinal studies of seizure network development.
• To characterize network changes during induced hyperexcitability.

Main Methods:

• Utilized 4-aminopyridine (4-AP) to induce hyperexcitable activity in vitro.
• Employed multiwell microelectrode arrays (MEAs) for neuronal network recording.
• Analyzed network changes using functional connectivity and dimensionality reduction techniques.

Main Results:

• 4-aminopyridine (4-AP) effectively induced persistently elevated mean firing rates.
• Significant alterations in underlying neuronal network connectivity patterns were observed.
• Demonstrated increased network changes after two days of chronic 4-AP treatment.

Conclusions:

• The developed in vitro MEA model provides a robust platform for studying seizure networks.
• This model allows for the investigation of longitudinal network changes in epilepsy.
• Lays the groundwork for future research into seizure network development and potential therapeutic targets.