Nobel Prize in Medicine Announced: Three US and German Scientists Honored for 'Optogenetics' | WPN World People News

The 2026 Nobel Prize in Physiology or Medicine was announced on the 5th, jointly awarded to Karl Deisseroth of Stanford University and the Howard Hughes Medical Institute in the United States, along with Peter Hegemann of Humboldt University of Berlin and Georg Nagel of the University of Würzburg in Germany. The three laureates will share the prize of 12 million Swedish kronor (approximately $1.2 million), honoring their discoveries regarding light-gated ion channels and optogenetics.

Optogenetics is a technique in which light-sensitive proteins are introduced into specific nerve cells, allowing light to precisely control neuronal activity. This enables researchers to 'switch on' or 'switch off' specific nerve cells in living brains and observe how neural circuits influence memory, emotion, and behavior.

Compared to traditional electrical stimulation, optogenetics can target specific cells and neural circuits with far greater precision, making it an essential tool in modern neuroscience. This research opens new avenues for understanding how the brain functions.

The breakthrough originated from research on algae: Hegemann and Nagel studied how single-celled algae sense light, discovering a light-sensitive protein known as channelrhodopsin, which opens ion channels upon light stimulation and triggers electrical activity in cells.

Deisseroth further applied this discovery to neuroscience by introducing the relevant genes into mammalian neurons and using optical fibers to control neural activity, gradually establishing the technology of optogenetics. Since its development in the early 2000s, this work has fundamentally transformed how scientists investigate neural circuits in the brain.

Even more compelling is its medical potential; scientists are currently exploring the application of optogenetics to conditions such as epilepsy, dementia, Parkinson's disease, autism, depression, and other psychiatric disorders, while also experimenting with using the technique to improve vision and address other neurosensory impairments. Some studies have even advanced to exploratory clinical trials in humans, indicating that 'controlling nerves with light' may gradually evolve from a research tool into a therapeutic technology.

The Nobel Assembly noted that this research allows humanity to explore the brain with unprecedented precision and offers new possibilities for the future treatment of neurological diseases.