Peripheral nerves help to build the adrenal glandsAdrenalin, a key stress hormone in our body, is produced inside of our adrenal glands by so called chromaffin cells. These neuroendocrine cells were thought to originate from a population of migratory embryonic progenitors called neural crest. This knowledge stayed as a dominating paradigm for several decades before this recent study, which demonstrates that most of the adrenal medulla cells are generated from completely different and rather peculiar progenitors. Contributors from the Department of Neuroscience at Karolinska Institutet include Slava Dyachuk, Saida Hadjab, Dimitri Kamenev, Kaj Fried and Francois Lallemend. The study was published in Science on July 7, 2017.