Human iPSC-Derived Neuron and Oligodendrocyte Co-culture as a Small-Molecule Screening Assay for Myelination.

Neurons and oligodendrocytes are the building blocks of the brain. Neurons form synaptic connections and transmit signals, while oligodendrocytes, including oligodendrocyte precursor cells (OPCs) and their derivatives, are vital for central nervous system maintenance and myelination. The demand for human-specific neuron-oligodendrocyte model systems to study these interactions has grown, yet co-culture protocols remain limited. Recent advancements in the field provide methods for deriving co-cultures of neurons and OPCs from human induced pluripotent stem cells (hiPSC), each with distinct benefits and challenges. This study presents a time-efficient, reproducible method to derive neurons and O4-expressing oligodendrocytes, followed by a straightforward co-culture system that minimizes astrocyte differentiation and ensures robust neuron and oligodendrocyte populations. Key features • Reliable, stable generation of neurons and O4-expressing oligodendrocytes within a practical timeframe. • Co-culture system utilizing hIPSC-derived neurons and O4-expressing oligodendrocytes. • Maturation of neurons and oligodendrocytes achieved within 10 days of co-culturing. Graphical overview The diagram outlines the sequential steps involved in the preparation, differentiation, and analysis phases. Key stages include the differentiation of neural progenitor cells (NPCs) into O4-expressing oligodendrocytes and neurons separately and then combining them into a co-culture, which can then be used for further experiments.