“…The reprogrammed stem cells present greatly promises to downstream clinical applications for restoring, maintaining, or enhancing tissue and organ function for neurodegenerative disorders, such as Parkinson's disease [1], Alzheimer's disease [35], multiple sclerosis [36], spinal cord injury [37], stroke [38], and possibly neuropsychiatric illnesses [4,26]. However, for real-world clinical transition there are concerns about technologies in quantities and quickness of neuron products, including differentiated progressive staging neuronal cells generated by reprogrammed stem cells, and potential cancer risks for viral vector carrying reprogramming genes.…”