Karl Deisseroth, Peter Hegemann and Georg Nagel have jointly received the 2026 Nobel Prize in Physiology or Medicine for discoveries involving light-gated ion channels and optogenetics. The method lets researchers activate nerve cells with precisely controlled light.
The 2026 Nobel Prize in Physiology or Medicine has been awarded jointly to Karl Deisseroth, Peter Hegemann and Georg Nagel for discoveries concerning light-gated ion channels and optogenetics. The Associated Press and Nature reported the award.
Their research helped establish a way to control nerve-cell activity with light. Hegemann studied how the single-celled alga Chlamydomonas moves toward a light source; Nagel identified an algal protein that opens an ion channel when exposed to blue light. Deisseroth adapted the mechanism to control neurons.
In current experiments, researchers deliver genes for light-sensitive proteins into selected cells and then apply precise light pulses. This allows them to observe neural circuits and investigate links to memory, emotions and behavior.
Optogenetics has become a tool for neuroscience research, including studies of processes relevant to neurological and psychiatric disorders. Researchers are exploring possible applications to Alzheimer’s disease, addiction and vision loss; these remain research directions, not widely available treatments.
An editorial in The Hindu argues that advances in laboratory research should be accompanied by efforts to make future medical benefits accessible regardless of where people live or their economic circumstances.