A team of researchers have found a recently developed system for switching on the activity of genes that could improve treatments for a broad range of neurological diseases. They have developed new gene promoters - which act like switches to turn on gene expression - that promise to broaden the ability to deliver large genes and keep them active for long periods of time. Esteban Engel, a researcher in viral neuro-engineering in the Princeton Neuroscience Institute, and his team have concluded this research that was published in the journal Molecular Therapy: Methods & Clinical Development.