2026 Nobel Prize in Physiology or Medicine: Optogenetics Pioneers Honored

The 2026 Nobel Prize in Physiology or Medicine goes to Karl Deisseroth, Peter Hegemann and Georg Nagel for the discovery of optogenetics—using a light-sensitive algal protein to switch individual nerve cells on or off in a living brain.

The 2026 Nobel Prize in Physiology or Medicine has been awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel for their pioneering contributions to optogenetics. Their work made it possible to switch the activity of individual nerve cells in a living brain on or off using light.

At the heart of optogenetics is a light-sensitive protein from algae—channelrhodopsin. Hegemann and Nagel showed how this protein converts light into electrical signals; Deisseroth combined it with neuroscience tooling so that researchers could remotely control specific neural circuits in freely moving animals with millisecond precision.

The method is now used in laboratories worldwide to unravel how the brain forms memories, feelings and behaviours, and has opened new avenues for studying neurological and psychiatric disorders.

Optogenetics made it possible to switch on, or off, the activity of individual nerve cells in a living brain—now a standard tool in labs worldwide.

For CDMOs and biotech companies focused on neuroscience drug development, the precise-control thinking behind optogenetics continues to inspire new neuromodulation therapies and delivery approaches.