Cited by 6,337Immune cells in cancerImmune responses and vaccinationsImmune Response and Inflammation

Macrophage activation and polarization: nomenclature and experimental guidelines

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Murray, Peter J., Allen, Judith E., Biswas, Subhra K., Fisher, Edward A., Gilroy, Derek W., Goerdt, Sergij, Gordon, Siamon, Hamilton, John A. +17 more·2014·Immunity

Abstract

Description of macrophage activation is currently contentious and confusing. Like the biblical Tower of Babel, macrophage activation encompasses a panoply of descriptors used in different ways. The lack of consensus on how to define macrophage activation in experiments in vitro and in vivo impedes progress in multiple ways, including the fact that many researchers still consider there to be only two types of activated macrophages, often termed M1 and M2. Here, we describe a set of standards encompassing three principles-the source of macrophages, definition of the activators, and a consensus collection of markers to describe macrophage activation-with the goal of unifying experimental standards for diverse experimental scenarios. Collectively, we propose a common framework for macrophage-activation nomenclature.

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Crossref · 10.1016/j.immuni.2014.06.008

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  • iNOS2 has been associated with immunostimulation and immunosuppression.

    “iNOS2, which has been associated with immunostimulation (Hibbs et al., 1987; Murray et al., 2014; Stuehr and Nathan, 1989), as well as immunosuppression (Shi et al., 2001).”

    From TREM2 Modulation Remodels the Tumor Myeloid Landscape Enhancing Anti-PD-1 Immunotherapy (2020) · cites this paper as Murray et al., 2014

    The Background to the problem (p. 4) discusses macrophage activation and arginine metabolism, but does not link iNOS2 to immunostimulation. Searches for iNOS, NOS2, and nitric oxide did not locate a passage in our copy making that association. In the citing sentence, immunosuppression is attributed to Shi et al. (2001), not to this source. (LLM, conf=0.71)

    Experimental — accuracy not yet measured
  • Macrophage polarization is instructed by biomechanical properties of the fibrotic microenvironment, including matrix stiffness, fluid shear stress, and intercellular tension, through integrin/FAK, Piezo1/TRPV4, YAP/TAZ, NF-kB, and ROCK signaling.

    “Beyond biochemical cues, the biomechanical properties of the fibrotic microenvironment-notably increased matrix stiffness, fluid shear stress, and intercellular tension-are now recognized as active instructors of macrophage polarization (6,74,75).”
  • A pro-wound healing macrophage phenotype correlates with upregulation of Dcir, Stab1, CCL22, YM1, and Arg1.

    “A pro-wound healing phenotype of macrophage correlates with up regulation in expression of Dendritic Cell Immune Receptor (Dcir), Stabilin 1 (Stab1), chemokine (C-C motif) ligand 22 (CCL22), Chitinase-like 3 (YM1), and Arginase 1 (Arg1)44, 45, 46.”
  • A pro-inflammatory macrophage phenotype correlates with elevated expression of TNFα, IL1, and IRF5.

    “A pro-inflammatory macrophage phenotype correlates with elevated expression of Tumor Necrosis Factor α (TNF α), Interleukin 1 (IL1), and Interferon Regulatory Factor 5 (IRF5)44, 45, 46.”
  • A regulatory macrophage phenotype correlates with elevated expression of IL10, Light, and Sphk1.

    “Meanwhile, a regulatory macrophage phenotype has been characterized to correlate with elevated expression of Interleukin 10 (IL10), TNF superfamily member 14 (Light), and Sphingosine Kinase 1 (Sphk1)44, 45, 46.”

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Research works printed but not linked: 1

  1. Date D, Das R, Narla G, Simon DI, Jain MK, Mahabeleshwar GH. Kruppellike transcription factor 6 regulates inflammatory macrophage polarization. J Biol Chem. 2014; 289:10318-10329. [PubMed: 24385430]

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Authors
Murray, P. J., Allen, J. E., Biswas, S. K., Fisher, E. A., Gilroy, D. W., Goerdt, S., Gordon, S., Hamilton, J. A., Ivashkiv, L. B., Lawrence, T., Locati, M., Mantovani, A., Martinez, F. O., Mege, J.-L., Mosser, D. M., Natoli, G., Saeij, J. P., Schultze, J. L., Shirey, K. A., Sica, A., Suttles, J., Udalova, I., van Ginderachter, J. A., Vogel, S. N., & Wynn, T. A.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • Centre for Immunity, Infection and Evolution (GB)
  • Agency for Science, Technology and Research (SG)
  • New York University (US)
  • University College London (GB)
  • Heidelberg University (DE)
  • University of Oxford (GB)
  • The Royal Melbourne Hospital (AU)
  • Hospital for Special Surgery (US)
  • Centre d’Immunologie de Marseille-Luminy (FR)
  • University of Milan (IT)
  • University of Maryland, College Park (US)
  • European Institute of Oncology (IT)
  • Massachusetts Institute of Technology (US)
  • University of Bonn (DE)
  • University of Maryland, Baltimore (US)
  • Università degli Studi del Piemonte Orientale “Amedeo Avogadro” (IT)
  • University of Louisville (US)
  • National Institutes of Health (US)
Corresponding author
Murray, Peter J.
Venue
Immunity
Publisher
Elsevier BV
Published
2014-07
Volume
41
Issue
1
Pages
14-20
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2159560463
Cited by
6,337
References
50
Citations by year
2026: 590 · 2025: 519 · 2024: 585 · 2023: 540 · 2022: 653 · 2021: 637 · 2020: 635 · 2019: 489 · 2018: 439 · 2017: 477 · 2016: 408 · 2015: 294 · 2014: 54 · 2012: 2
FWCI
186.58
Type
journal article
Language
en
Update notices
erratum (2014-08-21)
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • Open Research (University of Surrey) (submittedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Research Portal (King's College London) (submittedVersion, other-oa)
  • Research Explorer (The University of Manchester) (submittedVersion)
  • VUBIR (Vrije Universiteit Brussel) (submittedVersion)
Funders
  • Wellcome Trust (095831, 087520)
  • National Institutes of Health (2r01ai046712-26)
  • Medical Research Council (MR/J001899/1, MR/K01207X/1)
  • National Heart, Lung, and Blood Institute (R01HL084312, HL-084312)
  • National Cancer Institute (P30CA021765)
  • National Institute of General Medical Sciences (R01GM102589)
  • National Institute of Allergy and Infectious Diseases (R56AI018797, AI-18797, R21AI097485, AI080621, R37AI018797, AI062921, R01-AI046712, R01AI018797, R01AI080621, R01AI062921, R01AI044938)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
macrophage activation, macrophage polarization, M1/M2 macrophages, nomenclature, standardization, macrophage markers
MeSH terms
Animals, Humans, Macrophage Activation, Macrophages, Terminology as Topic, Research, Macrophage Colony-Stimulating Factor, Granulocyte-Macrophage Colony-Stimulating Factor, Guidelines as Topic, Mice

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