11. Astrocytes signal neurons to build synapses by secreting a protein.12. The external plexiform layer contains astrocytes , interneurons and some mitral cells. 13. Reactive astrocytes may also promote secondary degeneration after CNS injury. 14. It seems currently that astrocytes are spared in these IgG negative cases. 15. Alternatively, the accumulation of glycosaminoglycan astrocytes in MS lesions. 16. Astrocytes protect neurons against excitotoxicity by taking up excess ammonia and glutamate.17. The CCL2 chemokine is also expressed by neurons, astrocytes and microglia. 18. Gliomas of the optic chiasm are usually derived from astrocytes . 19. Astrocytes maintain a small stock of nutrients in the form of glycogen.20. In general, its expression is confined to neurons and reactive astrocytes .
