Cited by 9,144Immune cells in cancerPhagocytosis and Immune RegulationCardiac Fibrosis and Remodeling

Exploring the full spectrum of macrophage activation

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Mosser, David M., Edwards, Justin P.·2008·Nature Reviews Immunology

Abstract

Macrophages display remarkable plasticity and can change their physiology in response to environmental cues. These changes can give rise to different populations of cells with distinct functions. In this Review we suggest a new grouping of macrophage populations based on three different homeostatic activities - host defence, wound healing and immune regulation. We propose that similarly to primary colours, these three basic macrophage populations can blend into various other 'shades' of activation. We characterize each population and provide examples of macrophages from specific disease states that have the characteristics of one or more of these populations.

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Crossref · 10.1038/nri2448

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  • During cancer development, tumor cells and tumor-associated stromal cells continuously change the composition and organization of ECM through deposition/degradation cycles and extensive crosslinking, shaping it more supportive for tumor growth.

    “During cancer development, tumor cells and tumor‐associated stromal cells continuously change the composition and organization of ECM through deposition/degradation cycles and extensive crosslinking, shaping it more supportive for tumor growth.[ 33 ]”

    From 3D Biomimetic Models to Reconstitute Tumor Microenvironment In Vitro: Spheroids, Organoids, and Tumor‐on‐a‐Chip (2023) · cites this paper as [33]

    Split into 2 atoms — 0 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 1 unverifiable. Expand the claim to see per-atom verdicts.

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  • A more recent model hypothesizes a macrophage spectrum between M1 and M2, regulated through three major homeostatic processes involving host defense, wound healing, and immune modulation.

    “A more recent model also hypothesizes the existence of a macrophage spectrum between M1 and M2, regulated through three major homeostatic processes involving the host defense, wound healing, and immune modulation.[ 40 ]”

    From Unraveling and Harnessing the Immune Response at the Cell–Biomaterial Interface for Tissue Engineering Purposes (2024) · cites this paper as [40]

    The Abstract proposes a spectrum of macrophage populations based on three homeostatic functions: host defence, wound healing and immune regulation. But it describes the linear spectrum between M1 and M2 as an earlier classification that its three-population model seeks to improve, not as the model it proposes. The functions are a basis for classification, rather than processes said to regulate the spectrum. (LLM, conf=0.88)

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  • Common examples of cytokines that polarize macrophages are IFN-γ and LPS, which skew macrophages toward M1, whereas IL-4 and IL-13 promote a regenerative M2 phenotype.

    “Common examples of cytokines that polarize macrophages are IFN‐γ and LPS, which skew macrophages toward the M1 phenotype, whereas cytokines such as IL‐4 and IL‐13 promote a regenerative M2 phenotype (Figure 2 ).[ 40 ]”

    From Unraveling and Harnessing the Immune Response at the Cell–Biomaterial Interface for Tissue Engineering Purposes (2024) · cites this paper as [40]

    The Classically activated macrophages section links IFNγ and LPS-mediated TLR stimulation to classical activation, while the Wound-healing macrophages section links IL-4 and IL-13 to wound-healing macrophages. But the paper calls LPS a TLR ligand, not a cytokine, and cautions that M2 is broader than the wound-healing phenotype. Our copy provides section labels but no page numbers. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • M1-M2 transition is critical for resolution of inflammation and tipping the balance to tissue repair.

    “This M1–M2 transition is critical for the resolution of inflammation and tipping the balance to tissue repair [49].”

    From Transition from inflammation to proliferation: a critical step during wound healing (2016) · cites this paper as [49]

    The Wound-healing macrophages section (page unavailable) says IL-4 can convert resident macrophages to a wound-healing phenotype and that these cells produce few pro-inflammatory cytokines. This supports a shift toward tissue repair, but the paper does not establish that an M1–M2 transition is critical for resolving inflammation. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Aβ deposition elicits a robust M1 microglia-mediated inflammatory response contributing to disease pathogenesis.

    “Aβ deposition elicits a robust “M1” microglia-mediated inflammatory response contributing to disease pathogenesis (Gordon, 2003; Mosser and Edwards, 2008; Mandrekar-Colucci and Landreth, 2010).”

    From Mechanisms Underlying the Rapid Peroxisome Proliferator-Activated Receptor-γ-Mediated Amyloid Clearance and Reversal of Cognitive Deficits in a Murine Model of Alzheimer's Disease (2012) · cites this paper as Mosser and Edwards, 2008

    The ‘Classically activated macrophages’ section says their pro-inflammatory cytokines can damage the host and contribute to inflammatory pathology. The paper also mentions CNS microglia in ‘The origin and maintenance of macrophages,’ but does not say that Aβ deposition triggers an M1 microglial response or that such a response contributes to disease pathogenesis. No page numbers are available in our copy. (LLM, conf=0.85)

    Experimental — accuracy not yet measured

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Authors
Mosser, D. M., & Edwards, J. P.
Affiliations
University of Maryland, College Park (US)
Corresponding author
Mosser, David M.
Venue
Nature Reviews Immunology
Published
2008-12
Volume
8
Issue
12
Pages
958-969
ISSN
  • 1474-1733 (ISSN-L)
  • 1474-1741
OpenAlex
W2054472394
Cited by
9,144
References
121
Citations by year
2026: 308 · 2025: 470 · 2024: 582 · 2023: 589 · 2022: 661 · 2021: 706 · 2020: 680 · 2019: 592 · 2018: 534 · 2017: 592 · 2016: 549 · 2015: 587 · 2014: 586 · 2013: 534 · 2012: 461
FWCI
17.23
Type
journal article
Language
en
Update notices
erratum (2010-06-01)
Open access
Locations
  • Nature reviews. Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (R21AI055576, R01AI055576, AI 55576, R01AI049388, AI49388, R01AI049383)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
Keywords
macrophage activation, macrophage plasticity, homeostasis, host defense, wound healing, immune regulation, macrophage heterogeneity
MeSH terms
Animals, Humans, Immunity, Innate, Inflammation, Macrophage Activation, Macrophages, Wound Healing, Cytokines

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