keywords AXONAL REGENERATION Cell Biology FIND-ME SIGNAL FUNCTIONAL RECOVERY IMAGING REVEALS Life Sciences & Biomedicine MICROGLIAL ACTIVATION NEURAL PROGENITOR CELLS NUCLEOTIDE RECEPTOR Neurosciences Neurosciences & Neurology P2X7 RECEPTOR RADIAL GLIAL-CELLS REACTIVE ASTROCYTES Science & Technology cell death differentiation glia inflammation neurogenesis proliferation purinergic signaling reactive gliosis regeneration spinal cord injury teleost