Protocol for quantifying pyramidal neuron hyperexcitability in a mouse model of neurodevelopmental encephalopathy

Area of Science:

• Neuroscience
• Neurophysiology
• Molecular Neuroscience

Background:

• STXBP1 mutations are linked to neurodevelopmental disorders.
• Understanding neuronal hyperexcitability is crucial for STXBP1 encephalopathy research.
• Microcircuit dysfunction contributes to neurological symptoms.

Purpose of the Study:

• To present a detailed protocol for quantifying pyramidal neuron hyperexcitability.
• To investigate microcircuit failures in a mouse model of STXBP1 neurodevelopmental encephalopathy (Stxbp1^hap).
• To provide a reproducible method for electrophysiological assessment.

Main Methods:

• Preparation of acute brain slices from a mouse model.
• Electrode placement for recording layer 2/3 cortical pyramidal neurons.
• Stimulation of excitatory axons to assess neuronal excitability and feedforward inhibition.

Main Results:

• The protocol allows for the quantification of pyramidal neuron hyperexcitability.
• The method is suitable for investigating microcircuit alterations.
• Demonstrates a reproducible approach to study STXBP1-related neuronal dysfunction.

Conclusions:

• This protocol offers a standardized method for studying STXBP1 encephalopathy.
• It facilitates the investigation of neuronal hyperexcitability and microcircuit deficits.
• Enables further research into the mechanisms underlying STXBP1-related neurological conditions.