Nobel Prize in Medicine 2026: Optogenetics

WHAT HAPPENED The Nobel Assembly at Karolinska Institutet announced on 5 October 2026 that the Nobel Prize in Physiology or Medicine goes jointly to Karl Deisseroth (Stanford University, USA), Peter Hegemann (Humboldt University of Berlin, Germany) and Georg Nagel (University of Wurzburg, Germany). The three are honoured for finding how light can open channels in cells, which led to the technique called optogenetics. WHAT THE WORK IS Hegemann and Nagel showed that light-sensitive proteins from single-celled algae (channelrhodopsins) act as ion channels that open when light falls on them. Deisseroth helped turn this into a working tool: a gene for such a protein is delivered to selected neurons, and a flash of light of the right colour then makes those neurons fire or go quiet. The method, called optogenetics, lets researchers see which groups of neurons are behind a memory, a mood or an action, and labs around the world now use it for brain research. EXAM ANGLE - Nobel Prizes in Medicine, Physics, Chemistry, Literature and Peace have been given since 1901; the Economics prize was added in 1968 by Sweden's central bank. Prizes are presented on 10 December, the anniversary of Alfred Nobel's death. - The Medicine prize is chosen by the Nobel Assembly at the Karolinska Institutet in Stockholm. - Keywords to remember: optogenetics, channelrhodopsin, light-gated ion channel. Published on 5 Oct 2026. Source: Nobel Prize website (nobelprize.org) announcement.