Low-Density Neuronal Cultures from Human Induced Pluripotent Stem Cells

Area of Science:

• Neuroscience
• Stem Cell Biology
• Developmental Biology

Background:

• Induced pluripotent stem cell (iPSC)-based technologies are valuable for studying neuronal differentiation defects in neuropsychiatric and neurodevelopmental disorders.
• High-density neuronal cultures present challenges for detailed morphometric and functional analysis due to complex intercellular connections.

Purpose of the Study:

• To describe a protocol for generating low-density human neuronal cultures from iPSC-derived neural stem cells/early neural progenitor cells.
• To enable facile and unbiased comparisons of iPSC-derived neurons from different individuals or clones.

Main Methods:

• Developed a differentiation protocol to generate low-density neuronal cultures (approximately 2,500 neurons/cm²).
• Utilized human iPSC-derived neural stem cells/early neural progenitor cells for culture generation.
• Evaluated morphometric features of neurons from individuals with and without a 15q11.2 microdeletion.

Main Results:

• Successfully generated low-density neuronal cultures from cells of three individuals.
• Observed an approximately 7.5-fold increase in dendritic filopodia density in neurons with the 15q11.2 microdeletion, aligning with prior findings.
• Demonstrated the utility of low-density cultures for comparative analysis.

Conclusions:

• Low-density neuronal cultures provide a simplified model system for studying neuronal development and disease.
• This protocol facilitates the investigation of cellular phenotypes in iPSC-derived neurons from individuals with genetic variations.
• The method supports robust comparisons of neuronal characteristics across different genetic backgrounds or cell clones.