Effect of phagocytosis by human polymorphonuclear leukocytes and rabbit alveolar macrophages on 2-deoxyglucose transport

Abstract

2-Deoxyglucose transport was characterized in human polymorphonuclear leukocytes (PMN) and rabbit alveolar macrophages (AM). The Km was 1 mM for human PMN and 1.6 mM for rabbit AM, and the Vmax was 0.66 × 10⁻³ μmoles/45 sec/10⁶ PMN and 5.09 × 10⁻⁴ μmoles/45 sec/10⁶ AM. The rate of 2-deoxyglucose transport was the same before and after phagocytosis in PMN from normal individuals and three patients with chronic granulomatous disease, as well as rabbit AM. Studies of the kinetics of 2-deoxyglucose transport and intracellular fate of 2-deoxyglucose in human PMN indicate that the nature of the membrane transport system is not altered by phagocytosis. The results support the concept that the plasma membrane is mosaic in character with geographically separate transport and phagocytic sites.