FIGURE 4.
Myeloid cells and neuronal circuit re-establishment. Myeloid cells such as microglia can modify neuronal activity and stimulate the NSCs to sprout axons and rebuild synaptic networks. IL-4 induced M2 myeloid cells and BMP antagonist induced iron-releasing microglia protect oligodendrocytes through different mechanisms, such as enhancing remyelination and oligodendrogenesis, which all contribute to the re-establishment of the neuronal circuit. NSC, neural stem cells; IL-4, interleukin 4; BMP, bone morphogenetic protein.