Complex sentence: Each of the P2X subtypes are found in sensory neurons with the exception of P2X7 receptor, which is selectively expressed by SGCs and has been implicated in the release of interleukin IL-1β from macrophages or microglia and astrocytes.
Split into simpler sentences: Each of the P2X subtypes are found in sensory neurons with the exception of 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.