Mast cell-serotonin sensory axis (MCSA)

The mast cell-serotonin sensory axis is a complex neuro-immune signaling circuit rather than a single molecular target. It involves the activation of mast cells, which release serotonin (5-HT) and other mediators that subsequently activate specific serotonin receptors on adjacent sensory nerve endings. This interaction is a critical driver of sensations such as pain and chronic itch, particularly in inflammatory skin and mucosal diseases. While the axis itself is a therapeutic concept, drug development typically focuses on specific components within it, such as the 5-HT3 receptor or mast cell stabilizers. Understanding this axis is vital for developing integrated treatments for conditions like atopic dermatitis and irritable bowel syndrome where immune-to-nerve communication is pathological.

Other names

Mast cell-neuron axisMast cell-serotonin-sensory neuron signaling pathwayNeuro-immune axis

Modulation of mast cell degranulation or antagonism of serotonin receptors (e.g., 5-HT3) on sensory neurons to interrupt neuro-immune signaling.