Researchers at the University of Illinois Urbana-Champaign have developed a method that turns brain wiring into a sequencing problem. Their Connectome-seq technique labels neurons with RNA barcodes and reads which barcodes meet at synapses, revealing direct connections.
From microscope slog to sequencing map
Mapping neural circuits has traditionally required painstaking imaging and reconstruction. Connectome-seq aims to scale the work by attaching molecular identifiers to neurons, isolating synapses and sequencing barcode pairs.
In mouse brain circuits, the method mapped more than 1,000 neurons and revealed previously unknown connection patterns. The long-term hope is that such tools could show how networks change in diseases before symptoms appear.
Why it matters
Brains fail through circuits as well as cells. If scientists can see exactly which connections weaken, break or rewire, they may gain earlier ways to understand neurodegenerative and psychiatric disease.
