Glial scar hand, absence of the glial scar has been associated with impairments in the repair of the blood brain barrier. The glial scar is composed of several components briefly discussed below. Reactive astrocytes are the main cellular component of the glial scar. After injury, astrocytes undergo morphological changes, extend their processes, and increase synthesis of glial fibrillary acidic protein (GFAP). GFAP is an important intermediate filament protein that allows the astrocytes to begin synthesizing more cytoskeletal supportive structures and extend pseudopodia. Ultimately, the astrocytes form a dense web of their plasma membrane extensions that fills the empty space generated by the
Satellite glial cell in nociception. Various neuronal receptors present on SGCs have been named as participants in ATP-evoked pain signals, particularly the homomultimer P2X3 and the heteromultimer P2X2/3 purinoceptors. In general, the P2X family of receptors responds to neuronally released ATP. Each of the P2X subtypes are found in sensory neurons with the exception of the P2X7 receptor, which is selectively expressed by glial cells, including SGCs. The receptor has been implicated in the release of interleukin IL-1β from macrophages or microglia and astrocytes. The receptor likely has a part in the cascade of events that end with inflammation and neuropathic pain. It