The P2X7-nonmuscle myosin membrane complex regulates phagocytosis of nonopsonized particles and bacteria by a pathway attenuated by extracellular ATP.

Phagocytosis of nonopsonized bacteria is central to innate immunity, but its regulation is less defined. We show that overexpression of the P2X(7) receptor greatly augments the phagocytosis of nonopsonized beads and heat-killed bacteria by transfected HEK-293 cells, whereas blocking P2X(7) expression by siRNA significantly reduces the phagocytic ability of… CONTINUE READING