Scientists can take ordinary human skin cells (fibroblasts) and directly convert them into functional neurons.
Published in Brain/Neurology, Tools.
Scientists can take ordinary human skin cells (fibroblasts) and directly convert them into functional neurons. By activating a small set of neuron-defining transcription factors (such as ASCL1, BRN2, and MYT1L), these cells bypass a stem-cell stage and rapidly adopt neuronal identity, structure, and electrical activity.
At the molecular level, reprogramming reshapes the cell’s epigenetic landscape—turning off skin-cell programs and activating genes for ion channels, synapses, and neurotransmission. Within weeks, these induced neurons extend dendrites and axons, form synapses, and fire action potentials.
Why this matters:
🧬 Patient-specific neurons that preserve a person’s genetics
⏱️ Faster and often more faithful than stem-cell approaches
⚡ Enables direct measurement of human neuronal signaling and networks
💊 Powerful platforms for disease modeling and drug testing
What you’re seeing: skin-derived human neurons forming complex, branching networks—cells once built for structure, now rewired for communication.
Credit to Dr. Bruno Cisterna and Dr. Eric Vitriol for the great image!