Low-dose chidamide inhibited macrophage phagocytosis of antibody-coated platelets in vitro. (A) Low-dose chidamide (10 nM) inhibited macrophage phagocytosis of mouse anti-human antibody-coated platelets in vitro (n = 4). (B) Intracellular fluorescence–positive scatters indicates platelets phagocytosed by macrophages. CD42⁺ scatter indicates adhered, but unphagocytosed, platelets. **P < .01.