Pnky, a noncoding RNA found in brain Stem Cells, may have a broad range of clinical applications Friday, 20 March 2015 A research team at UC San Francisco has discovered an RNA molecule called Pnky that can be manipulated to increase the production of neurons from neural stem cells. The research, led by neurosurgeon Daniel A. Lim, MD, PhD, and published on March 19, 2015 in Cell Stem Cell