Cell-to-cell signalling mediated via CO2: activity dependent axonal CO2 production opens Cx32 in the Schwann cell paranode.
This study demonstrates that activity-dependent axonal CO2 production triggers the opening of Schwann cell Cx32 hemichannels via a mechanism involving AQP1 and carbonic anhydrase, thereby mediating neuron-to-glia signaling that regulates paranodal calcium influx and conduction velocity.