Human stem cell–derived monocytes and microglia-like cells reveal impaired amyloid plaque clearance upon heterozygous or homozygous loss of TREM2

Murine microglia expressing the Alzheimer’s disease–linked TREM2R47H mutation display variable decrease in phagocytosis, while impaired phagocytosis is reported following loss of TREM2. However, no data exist on TREM2+/R47H human microglia. Therefore, we created human pluripotent stem cell (hPSC) monocytes and transdifferentiated microglia-like cells (tMGs) to examine the effect of the TREM2+/R47H mutation and loss of TREM2 on phagocytosis.