Nobel Prize in Physiology or Medicine goes to three scientists for light-gated ion channels and optogenetics
5 October 2026
The Nobel Assembly at Karolinska Institutet awarded the 2026 Nobel Prize in Physiology or Medicine jointly to Karl Deisseroth, Peter Hegemann and Georg Nagel.
The citation is "for their discoveries concerning light-gated ion channels and optogenetics".
Deisseroth works at the Howard Hughes Medical Institute and Stanford University in the United States.
Hegemann is at Humboldt University of Berlin and Nagel at the University of Wurzburg, both in Germany.
Hegemann and Nagel discovered channelrhodopsin, a protein in a single-celled alga; Deisseroth turned it into a light-controlled switch for nerve cells.
Optogenetics allows researchers to show how nerve cells shape memories, feelings and behaviour in the living brain.
In plain words
Optogenetics Optogenetics — A method that uses light to switch selected nerve cells on or off in a living animal.
Channelrhodopsin Channelrhodopsin — A light-gated ion channel protein first found in a single-celled alga.