Robust Expression of Functional NMDA Receptors in Human Induced Pluripotent Stem Cell-Derived Neuronal Cultures Using...

Area of Science:

• Neuroscience
• Stem Cell Biology
• Molecular Biology

Background:

• N-methyl-D-aspartate (NMDA) receptors are crucial for cognitive functions.
• Existing protocols for converting human induced pluripotent stem cells (iPSCs) to mature neurons often lack functional NMDA receptors (NMDARs) or require extended differentiation times.
• Studying human-specific NMDAR function is vital for understanding neurological health and disease.

Purpose of the Study:

• To develop a rapid and efficient protocol for differentiating human iPSC-derived neural progenitor cells (NPCs) into mature neurons.
• To confirm the presence and functionality of N-methyl-D-aspartate receptors (NMDARs) in neurons generated by the new protocol.
• To establish a simplified method for studying NMDARs without organoid formation or rodent co-cultures.

Main Methods:

• Human iPSC-derived neural progenitor cells (NPCs) were differentiated into mature neurons over 37 days.
• Functional N-methyl-D-aspartate receptors (NMDARs) were assessed using ligand-activated calcium flux assays.
• Electrically evoked postsynaptic currents mediated by NMDARs were recorded.

Main Results:

• The protocol successfully generated mature neurons from human iPSC-derived NPCs in 37 days.
• Neurons exhibited functional N-methyl-D-aspartate receptors (NMDARs) demonstrated by calcium flux.
• NMDAR-mediated electrically evoked postsynaptic currents were successfully documented.

Conclusions:

• A novel, rapid protocol yields mature neurons with functional N-methyl-D-aspartate receptors (NMDARs) from human iPSCs.
• This method simplifies NMDAR research by avoiding organoids and rodent co-cultures.
• The protocol facilitates the study of human-specific NMDAR signaling in neurological conditions.