2026 Nobel Prize in Physiology or Medicine awarded for discovery enabling light control of neurons

Recognition for a revolutionary approach to neuroscience

The Nobel Prize Committee announced the winners in Physiology or Medicine for 2026. The award was shared between American neurobiologist Karl Deisseroth and German researchers Peter Hegemann and Georg Nagel. The official justification for the decision reads: "за відкриття світлокерованих іонних каналів та оптогенетики" (for the discovery of light-gated ion channels and optogenetics).

Discovery of a light-reactive protein

The foundation for this achievement was laid by research conducted by Peter Hegemann and Georg Nagel in the early 2000s. While studying single-celled algae, the scientists identified the light-sensitive protein channelrhodopsin. This molecule is capable of responding to light signals, allowing charged particles to pass through the cell membrane.

The identification of channelrhodopsin spurred the development of a new method — optogenetics. Its essence lies in the ability to make certain cells sensitive to light and then regulate their activity using light pulses.

Application in brain research

Karl Deisseroth adapted this principle for work with neurons. In his experiments, the researcher introduced a gene encoding channelrhodopsin into neurons. This allowed him to demonstrate that light can be used to precisely switch on or off the activity of individual neurons in a living brain.

Thus, scientists obtained a unique tool for remote control of nerve cells. This significantly increased the precision of brain network research compared to previous methods.

Prospects for medicine and science

Optogenetics has already become an important tool for studying the mechanisms of memory formation, emotions, and behaviour. The method also opens new horizons for medical research. Specifically, the technology is already being tested in the context of restoring vision in patients with certain impairments. Researchers are also considering the potential of optogenetics for developing future treatments for neurological diseases.

Laureates and prize amount

Peter Hegemann works at Humboldt University in Berlin, Georg Nagel at the University of Würzburg, and Karl Deisseroth at Stanford University. The three laureates will equally share the Nobel Prize monetary award, which amounts to 12 million Swedish kronor (approximately 1.2 million US dollars).