Cited by 147Phagocytosis and Immune RegulationImmune cells in cancerLymphoma Diagnosis and Treatment

Enhanced Apoptotic Cell Clearance Capacity and B Cell Survival Factor Production by IL-10-Activated Macrophages: Implications for Burkitt’s Lymphoma

Ogden, Carol Anne, Pound, John D, Batth, Balvinder K, Owens, Sarah, Johannessen, Ingolfur, Wood, Katrina, Gregory, Christopher D·2005·The Journal of Immunology

Abstract

Burkitt’s lymphoma (BL) is typified by frequent tumor cell apoptosis and significant macrophage infiltration. Since BL cells have an inherent tendency to undergo apoptosis at a high rate, we reasoned that macrophages in BL are functionally enhanced in at least two activities that have implications for tumor pathogenesis: 1) engulfment of apoptotic cells, an anti-inflammatory process known to suppress immune responses, and 2) production of BL cell survival factors that limit the extent of tumor cell apoptosis. In this study, we show that the microenvironment of BL is rich in the pleiotropic cytokine IL-10, which can be produced by both tumor cells and macrophages, and that IL-10-activated human macrophages have enhanced capacity to engulf apoptotic cells in vitro. This was found to be dependent on the macrophage tethering receptor of apoptotic cells, CD14. Furthermore, IL-10-activated macrophages were found to produce markedly higher levels of the B cell survival factor, B cell-activating factor of the TNF family/B lymphocyte stimulator (BAFF/BLyS) than macrophages matured in the absence of IL-10. Coculture of macrophages with BL cells further enhanced BAFF secretion. Significantly, we show that enhancement of BL cell survival by IL-10-activated macrophages is mediated by a BAFF-dependent component and that BAFF is produced at high levels by tumor-associated macrophages in situ. These results indicate that macrophages, regulated by IL-10, have the potential to promote BL pathogenesis, first, through suppression of antitumor immunity following enhanced engulfment of apoptotic tumor cells and, second, through increased production of tumor cell growth/survival factors.

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Crossref · 10.4049/jimmunol.174.5.3015

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Authors
Ogden, C. A., Pound, J. D., Batth, B. K., Owens, S., Johannessen, I., Wood, K., & Gregory, C. D.
Affiliations
  • Centre for Inflammation Research (GB)
  • Laboratory for Clinical and Molecular Virology, University of Edinburgh College of Medicine and Veterinary Medicine , Edinburgh ,
  • Royal Victoria Infirmary (GB)
Venue
The Journal of Immunology
Published
2005-03-01
Volume
174
Issue
5
Pages
3015-3023
ISSN
  • 0022-1767 (ISSN-L)
  • 1550-6606
OpenAlex
W1818791232
Cited by
147
References
65
Citations by year
2026: 3 · 2025: 3 · 2024: 2 · 2023: 5 · 2022: 3 · 2021: 8 · 2020: 7 · 2019: 6 · 2018: 2 · 2017: 6 · 2016: 2 · 2015: 7 · 2014: 8 · 2013: 7 · 2012: 10
FWCI
4.51
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Lymphoma Diagnosis and Treatment
Keywords
Burkitt lymphoma, IL-10, macrophages, efferocytosis, CD14, BAFF, B lymphocyte stimulator, tumor-associated macrophages, tumor microenvironment, antitumor immunity, macrophage activation
MeSH terms
Adjuvants, Immunologic, Animals, B-Lymphocytes, Burkitt Lymphoma, Cell Movement, Cell Survival, Cells, Cultured, Humans, Macrophage Activation, Macrophages, Membrane Proteins, Mice, Inbred BALB C, Phagocytosis, Tumor Cells, Cultured, Tumor Necrosis Factor-alpha, Mice, SCID, Interleukin-10, Apoptosis, Coculture Techniques, Lipopolysaccharide Receptors, Cell Line, Tumor, Mice, B-Cell Activating Factor

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