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Sketch map for the opposite function of M1/M2 microglia. In this Tai Chi-diagram, the half-filled-out symbols with left half black represent M1 microglia, with the expression of MMPs, pro-inflammatory cytokine, and chemokine. And the right half white represents M2 microglia, with the expression of phagocytic receptors, anti-inflammatory cytokine, and growth factors.
