FIGURE 2.

Interactions and mediators between mast cells, microglia and astrocytes in the brain. Bidirectional interactions are demonstrated between each cell type with the mediators involved in boxes. Different mediators are released in response to cellular activation, which are shown for each cell type. Image created with BioRender.com. ATP, adenosine triphosphate; BDNF, brain derived neurotrophic factor; CCL5, C–C motif chemokine ligand 5; C5a, complement 5a; CXCR4, CXC chemokine receptor 4; GDNF, glial derived neurotrophic factor; IL, interleukin; MCP, mast cell protease; NO, nitric oxide; NT3, neurotensin 3; ROS, reactive oxygen species; TLR, toll like receptor; TNF-α, tumor necrosis factor alpha.