The Nobel Assembly at Karolinska Institutet in Sweden announced on Monday, October 5, 2026, that the 2026 Nobel Prize in Physiology or Medicine would be awarded to Karla Daiserooth, Peter Hegemann, and Georg Nagel. The trio was recognized for their groundbreaking work on light-sensitive ion channels and the field of optogenetics. This discovery has significantly advanced our understanding of the brain and has paved the way for new treatments for various neurological disorders.
According to the Nobel Assembly, the laureates were chosen for their pioneering work on ion channels that can be controlled by light. Peter Hegemann, 72, discovered a light-sensitive protein in green algae that converts light into electrical signals. He then collaborated with Georg Nagel, 73, to introduce this protein into frog egg cells, where they found that it formed a light-gated ion channel, which they named channelrhodopsin.
Karla Daiserooth, 55, built upon this discovery by introducing the protein into mammalian neurons and demonstrating that these cells could be precisely controlled by light with a response time of milliseconds. This breakthrough has enabled researchers to manipulate specific neural circuits with high precision, leading to a deeper understanding of brain function and behavior.
The Nobel Assembly noted that optogenetics has provided neuroscientists with a powerful tool to study the brain. By using light to activate or inhibit specific neurons, researchers can now establish causal relationships within brain circuits. This has opened up new avenues for research into neurological and psychiatric disorders, and has the potential to lead to the development of novel treatments.
The Nobel Prize in Medicine is awarded annually by the Nobel Assembly at Karolinska Institutet in Sweden. The prize is awarded to scientists who have made outstanding contributions to the field of physiology or medicine. The laureates will receive a prize amount of 12 million Swedish kronor (approximately $1.2 million), which will be shared among them.
The discovery of light-sensitive ion channels and optogenetics has revolutionized the field of neuroscience. The laureates' work has had a significant impact on our understanding of brain function and has paved the way for new treatments for various neurological disorders. Their research has also opened up new avenues for the development of novel therapies for psychiatric disorders.
The 2026 Nobel Prize in Medicine is a testament to the importance of basic scientific research and its potential to lead to groundbreaking discoveries. The laureates' work is a shining example of how fundamental research can lead to major advances in our understanding of the world and improve human health.
Key points
- The 2026 Nobel Prize in Medicine was awarded to Karla Daiserooth, Peter Hegemann, and Georg Nagel for their discovery of light-sensitive ion channels and optogenetics.
