Cited by 443Phagocytosis and Immune RegulationT-cell and B-cell ImmunologyAtherosclerosis and Cardiovascular Diseases

Regulatory T Cells Promote Macrophage Efferocytosis during Inflammation Resolution

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Proto, Jonathan D., Doran, Amanda C., Gusarova, Galina, Yurdagul, Arif, Sozen, Erdi, Subramanian, Manikandan, Islam, Mohammad N., Rymond, Christina C. +5 more·2018·Immunity

Abstract

Regulatory T (Treg) cell responses and apoptotic cell clearance (efferocytosis) represent critical arms of the inflammation resolution response. We sought to determine whether these processes might be linked through Treg-cell-mediated enhancement of efferocytosis. In zymosan-induced peritonitis and lipopolysaccharide-induced lung injury, Treg cells increased early in resolution, and Treg cell depletion decreased efferocytosis. In advanced atherosclerosis, where defective efferocytosis drives disease progression, Treg cell expansion improved efferocytosis. Mechanistic studies revealed the following sequence: (1) Treg cells secreted interleukin-13 (IL-13), which stimulated IL-10 production in macrophages; (2) autocrine-paracrine signaling by IL-10 induced Vav1 in macrophages; and (3) Vav1 activated Rac1 to promote apoptotic cell engulfment. In summary, Treg cells promote macrophage efferocytosis during inflammation resolution via a transcellular signaling pathway that enhances apoptotic cell internalization. These findings suggest an expanded role of Treg cells in inflammation resolution and provide a mechanistic basis for Treg-cell-enhancement strategies for non-resolving inflammatory diseases.

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Crossref · 10.1016/j.immuni.2018.07.015

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  • Tregs contribute to the control and termination of the inflammatory response by producing anti-inflammatory cytokines such as IL-10, TGF-β, and IL-35.

    “They contribute to the control and termination of the inflammatory response by producing anti‐inflammatory cytokines such as IL‐10, TGF‐β, and IL‐35.[ 9 ]”

    From Ccl2-Induced Regulatory T Cells Balance Inflammation Through Macrophage Polarization During Liver Reconstitution (2024) · cites this paper as [9]

    The Introduction says Tregs can secrete IL-10, and the Discussion links them to inflammation resolution. However, the Results say the pathway studied here depends on Treg-derived IL-13 inducing IL-10 production in macrophages, not on Tregs producing all three listed cytokines. Our copy does not establish Treg production of TGF-β or IL-35 in this response. (LLM, conf=0.89)

    Experimental — accuracy not yet measured
  • A regulatory T cell-mediated pathway of the inflammation resolution response promotes efferocytosis.

    “and new work indicates that a cellular pathway of the inflammation resolution response — mediated by regulatory T cells — also promotes efferocytosis79.”
  • The regulatory T cell mechanism involves IL-13 secretion, which stimulates macrophages to secrete and then be activated by IL-10.

    “The mechanism of the regulatory T cell response involves secretion of IL-13, which in turn stimulates macrophages to secrete and then be activated by the pro-efferocytic cytokine IL-10 (REF79).”
  • Impaired macrophage efferocytosis enhances atherogenesis and atherosclerotic plaque instability.

    “The impaired ability of macrophage efferocytosis would enhance atherogenesis [139,140,141] and atherosclerotic plaque instability [142,143,144].”
  • Elevated IL-10 signaling upregulates macrophage STAT3-mediated VAV1, which activates GTPase Rac1 to enhance apoptotic cell engulfment by macrophages.

    “The elevated IL-10 signaling upregulates macrophage STAT3-mediated VAV1 (a guanine nucleotide exchange factor), which activates GTPase Rac1 to enhance apoptotic cell engulfment by macrophages [139].”

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Authors
Proto, J. D., Doran, A. C., Gusarova, G., Yurdagul, A., Sozen, E., Subramanian, M., Islam, M. N., Rymond, C. C., Du, J., Hook, J., Kuriakose, G., Bhattacharya, J., & Tabas, I.
Affiliations
  • Columbia University (US)
  • Columbia University Irving Medical Center (US)
Corresponding author
Tabas, Ira
Venue
Immunity
Publisher
Elsevier BV
Published
2018-10
Volume
49
Issue
4
Pages
666-677.e6
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2894606588
Cited by
441
References
49
Citations by year
2026: 49 · 2025: 68 · 2024: 68 · 2023: 73 · 2022: 72 · 2021: 47 · 2020: 33 · 2019: 29 · 2018: 2
FWCI
11.91
Type
journal article
Language
en
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Dspace Repository (Marmara Üniversitesi) (submittedVersion, other-oa)
Funders
  • NIH (HL007343, HL122730, DoD-PR150672, HL132412, HL075662, HL127464, 5P30DK063608, P30CA013696)
  • American Heart Association
  • Scientific and Technological Research Council of Turkey
  • BIDEB 2214/A Program
  • Stony Wold-Herbert Fund Inc.
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
Keywords
regulatory T cells, macrophage efferocytosis, efferocytosis, inflammation resolution, IL-13, IL-10, Vav1, Rac1, zymosan-induced peritonitis, lipopolysaccharide-induced lung injury, atherosclerosis, Treg depletion
MeSH terms
Animals, Cell Line, Cells, Cultured, Humans, Inflammation, Lipopolysaccharides, Lung Diseases, Macrophages, Mice, Inbred C57BL, Peritonitis, Phagocytosis, Zymosan, Interleukin-10, Apoptosis, Mice, Knockout, Interleukin-13, Jurkat Cells, T-Lymphocytes, Regulatory

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