Nobel Prize 2026: Karl Deisseroth, Peter Hegemann And Georg Nagel Win Medicine Award

Stockholm: The process of announcement of Nobel Prizes for 2026 has started. The Nobel Prize in Physiology or Medicine has been jointly awarded to Karl Deisseroth, Peter Hegemann and Georg Nagel. He has been given this award for his important research related to light-gated ion channels and optogenetics. This technique gave scientists a way to control the activity of nerve cells with the help of light and opened new doors to understanding different circuits of the brain.

What is optogenetics?

Optogenetics is a scientific technique that uses genetic modification and light to control the activity of specific nerve cells. Through this, scientists can find out how a particular brain cell or neural circuit plays a role in memory, emotions and behavior. 

How did the story begin?

The initial link to this discovery is related to a single-celled alga named Chlamydomonas. Peter Hagemann and George Nagel, while researching this organism, identified a light-sensitive protein present on its surface, which was named Channelrhodopsin. When blue light falls on this protein, it opens a channel. Through this, charged particles start entering the cell and an electrical signal is generated. This process later became the basis of the technique of controlling nerve cells through light.

How did Carl Deisseroth advance his research?

Karl Deisseroth took a big step towards applying this discovery to the field of neuroscience. They delivered genes associated with Channelrhodopsin into rat nerve cells. After this, these neurons could be activated by shining blue light. Their research published in 2005 highlighted the potential of this technology. After this, in 2007 he also demonstrated that this system, controlled through light, could work in the brain of living rats. This technique was later called optogenetics.

Why is this technology important in understanding the brain?

The brain contains billions of neurons and extremely complex networks. Understanding the function of a particular neuron group has long been a major challenge for scientists. Optogenetics made this work more precise. Scientists can activate a specific group of nerve cells with light and then see how it changes behavior or brain processes. This has provided significant help in understanding the neural circuits associated with memory, emotions and behavior.

Can it also help in restoring eyesight?

The use of optogenetics is not limited to studying the brain in the laboratory. Scientists are also researching its possible medical use. These also include efforts to reactivate light-related cellular activity in visually impaired people.

Although such treatments are still in the research phase, optogenetics has opened up a new field of future possibilities for neurological diseases and vision problems.

Why did all three scientists get Nobel Prize?

Hagemann and Nagel made important contributions to the discovery and understanding of light-sensitive proteins, while Deisseroth did important work in applying this principle to nerve cells and the living brain. The research of the three together laid the foundation for developing such a device in neuroscience, which made it possible to study the extremely complex circuits of the brain in a more precise manner than before.