Nobel Prize in Medicine awarded for optogenetics breakthroughs

The 2026 Nobel Prize in Physiology or Medicine has been awarded to Karl Deisseroth, Peter Hegemann, and Georg Nagel for their groundbreaking discoveries in optogenetics. This technology allows scientists to control specific groups of neurons using light by equipping cells with light-sensitive proteins, such as channelrhodopsins.

The research traces back to the study of the green alga Chlamydomonas reinhardtii, which uses light-sensitive proteins to move toward light. Hegemann and Nagel characterized these proteins, specifically channelrhodopsin-2 (ChR2), which acts as an ion channel that opens upon light stimulation.

In addition to the laureates, the scientific community has highlighted the foundational work of Dr. Zhuo-Hua Pan of Wayne State University. In 2004, Pan was among the first to demonstrate that microbial light-sensitive proteins could be genetically inserted into mammalian neurons to trigger activity in response to light, a contribution acknowledged in the Nobel Committee’s official scientific background documentation.