Monocytes, Macrophages, and Their Diseases in Man
oo22-202X/ 78/ 7101-0056$02.oo/ 0 THE Jo fiNA L O F INVESTIGATIVE DERMATOLOGY, 71:56-58,1978 Vol. 71, NO.1 Copyright © 1978 by The Williams & Wilkins Co. Printed in U.S.A. I Monocytes, Macrophages, and Their Diseases in Man MARTiN J. CLINE, M.D. Division of Hematology-Oncology, Department of Medicine, University of California School of Medicine, Los Angeles, California, U.S.A. Mononuclear phagocytes are a widely distributed sys pool in a ratio of 1:3, (iii) monocytes leave the blood exponen tem of cells involved in host defense functions, immu tially with a half life of 8.4 hr, (iv), the half life may be prolonged nologic reactions, disposal of unwanted organic and in in patients with monocytosis and shortened in patients with \ organic materials, and synthesis of biologically active acute infection or splenomegaly, and (v) the normal monocyte compounds such as complement components and pros turnover rate averages 7 X lOG cells pel' hour pel' kilogram of taglandins. The system includes early precursor cells in body weight. the bone marrow, blood monocytes, alveolar and peri Available data suggest that there is no significant reentry of toneal macrophages, sinusoidal lining cells in the spleen, monocytes into the bloodstream once they have left the circu and Kupffer cells in the liver. We have recently come to lation. They enter the tissues and mature to macrophages. The understand the biology of these interesting cells and the major source of mononuclear phagocytes accumulating at in diseases they produce. flammatory foci is the monocyte precursors of the bone marrow [6].
[Show full text]