The 2026 Nobel Prize in Physiology or Medicine was awarded to Georg Nagel, Peter Hegemann and Karl Deisseroth “for their discoveries concerning light-gated ion channels and optogenetics.” Watch the 2-minute story below, then read the short timeline.
From a pond alga to a light switch for neurons
- The question: the human brain has about 86 billion neurons, and researchers had no way to switch on one defined group of them while leaving the rest alone.
- The alga: the single-celled green alga Chlamydomonas swims toward light. Hegemann wanted to know how it senses light.
- The channel (early 2000s): Nagel and Hegemann identified channelrhodopsin, a protein that opens an ion channel when it absorbs light, letting charged ions flow into the cell.
- The neuron (2005): Deisseroth’s group put the channelrhodopsin gene into mammalian neurons. A flash of blue light made them fire within milliseconds.
- The field: optogenetics now lets scientists turn chosen neurons on and off with light to study memory, fear, addiction and many other brain functions.
Why it matters for lab researchers
Optogenetics experiments still rely on everyday molecular biology: cloning the opsin gene into a vector, packaging and delivering it, and checking expression by PCR and qPCR. Changyu Bio supplies research reagents and lab consumables for these steps, including pTOPO cloning kits, PCR and qPCR master mixes, RNA/DNA extraction kits and Corning cell culture consumables.
More short science stories from Changyu Bio: YouTube · X. Research Use Only.
Source: The Nobel Prize in Physiology or Medicine 2026, NobelPrize.org (press release, 5 October 2026).