Divergence of macrophage phagocytic and antimicrobial programs in leprosy.

Montoya, Dennis; Cruz, Daniel; Teles, Rosane M B; Lee, Delphine J; Ochoa, Maria Teresa; Krutzik, Stephan R; Chun, Rene; Schenk, Mirjam; Zhang, Xiaoran; Ferguson, Benjamin G; Burdick, Anne E; Sarno, Euzenir N; Rea, Thomas H; Hewison, Martin; Adams, John S; Cheng, Genhong; Modlin, Robert L (2009). Divergence of macrophage phagocytic and antimicrobial programs in leprosy. Cell host & microbe, 6(4), pp. 343-353. Cell Press 10.1016/j.chom.2009.09.002

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Effective innate immunity against many microbial pathogens requires macrophage programs that upregulate phagocytosis and direct antimicrobial pathways, two functions generally assumed to be coordinately regulated. We investigated the regulation of these key functions in human blood-derived macrophages. Interleukin-10 (IL-10) induced the phagocytic pathway, including the C-type lectin CD209 and scavenger receptors, resulting in phagocytosis of mycobacteria and oxidized low-density lipoprotein. IL-15 induced the vitamin D-dependent antimicrobial pathway and CD209, yet the cells were less phagocytic. The differential regulation of macrophage functional programs was confirmed by analysis of leprosy lesions: the macrophage phagocytosis pathway was prominent in the clinically progressive, multibacillary form of the disease, whereas the vitamin D-dependent antimicrobial pathway predominated in the self-limited form and in patients undergoing reversal reactions from the multibacillary to the self-limited form. These data indicate that macrophage programs for phagocytosis and antimicrobial responses are distinct and differentially regulated in innate immunity to bacterial infections.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Service Sector > Institute of Pathology > Immunopathology

UniBE Contributor:

Schenk, Mirjam




Cell Press




Mirjam Schenk

Date Deposited:

25 Jul 2017 14:52

Last Modified:

25 Jul 2017 14:52

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