This protocol established a DRG communication system to study axonal communication through GJs. SARM1, an NAD-consuming enzyme, regulates axonal degeneration. Using the SARM1 activity-detecting probe PC11, we found that intercellular communication may regulate SARM1 activation, protecting against axonal degeneration. A related study utilizing this protocol has been published in Cell Death and Disease. This novel approach offers a streamlined method for researches of sensory neuron and GJs intercellular communication among neurons, with potential for advancing our understanding of sensory disorders and developing targeted therapies.