GRANULOCYTE FUNCTION IN CHRONIC GRANULOCYTIC LEUKEMIA .2. BACTERICIDAL CAPACITY, PHAGOCYTIC RATE, OXYGEN-CONSUMPTION, AND GRANULE PROTEIN-COMPOSITION IN ISOLATED GRANULOCYTES

Abstract

The initial rate of phagocytosis, O2 consumption rate during phagocytosis, bactericidal capacity against Escherichia coli and the granule protein composition of isolated mature-appearing granulocytes were studied in 23 patients with chronic granulocytic leukemia (CGL) with the simultaneous use of normal controls. The initial rate of phagocytosis was decreased (P < 0.05) in the CGL patient group, as were O2 consumption rate (P < 0.001) and bactericidal capacity (P < 0.001). Kinetic analysis of the ingestion rate showed CGL granulocytes to have the same capacity to bind the particles as normal granulocytes. Specific and primary granule protein deficiencies were shown for CGL granulocytes, and these deficiencies were more pronounced at or near blast cell transformation. Analysis of all different granulocyte function parameters showed an inverse correlation to white blood cell counts (P < 0.01) and to the percentage of immature granulocytes in peripheral blood (P < 0.001). The leukocytosis doubling time was progressively shortened during the chronic course of the disease. A correlation was found between granulocyte function parameters and leukocytosis doubling time (P < 0.001), indicating that granulocyte function was progressively deteriorating during chronic phase CGL, and may be an expression of increasing disturbance of the differentiation process.