(a) High-dimensional tSNE plots of concatenated FCS file (n = 36 biologically independent samples, Panel B). Each dot represents one cell. The color spectrum represents an expression level of CD206 (upper left), TMEM119 (upper middle), HLA-DR (upper right), CD86 (lower left) and CD36 (lower right). Red color denotes high expression, blue color denotes no expression. CD206low cell population is gated as “G1” (red circle) and “G2” (green circle). (b) Frequencies of each CD206-positive population in different brain regions (SVZ, n = 8; THA, n = 8; CER, n = 5; GTS, n = 8 & GFM, n = 7). The values of an individual donor were plotted in the same color. The black line represents the mean value.