Cited by 1,307Genomics and Chromatin DynamicsImmune cells in cancerNeuroinflammation and Neurodegeneration Mechanisms

Environment Drives Selection and Function of Enhancers Controlling Tissue-Specific Macrophage Identities

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Gosselin, David, Link, Verena M., Romanoski, Casey E., Fonseca, Gregory J., Eichenfield, Dawn Z., Spann, Nathanael J., Stender, Joshua D., Chun, Hyun B. +3 more·2014·Cell

Abstract

Macrophages reside in essentially all tissues of the body and play key roles in innate and adaptive immune responses. Distinct populations of tissue macrophages also acquire context-specific functions that are important for normal tissue homeostasis. To investigate mechanisms responsible for tissue-specific functions, we analyzed the transcriptomes and enhancer landscapes of brain microglia and resident macrophages of the peritoneal cavity. In addition, we exploited natural genetic variation as a genome-wide "mutagenesis" strategy to identify DNA recognition motifs for transcription factors that promote common or subset-specific binding of the macrophage lineage-determining factor PU.1. We find that distinct tissue environments drive divergent programs of gene expression by differentially activating a common enhancer repertoire and by inducing the expression of divergent secondary transcription factors that collaborate with PU.1 to establish tissue-specific enhancers. These findings provide insights into molecular mechanisms by which tissue environment influences macrophage phenotypes that are likely to be broadly applicable to other cell types.

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Crossref · 10.1016/j.cell.2014.11.023

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  • SPI1 (PU.1) binds SMAD3 to establish a homeostatic gene regulatory landscape in microglia.

    “SPI1, also known as PU.1, binds SMAD3 to establish a homeostatic gene regulatory landscape in microglia 18 .”

    From APOE4 impairs the microglial response in Alzheimer’s disease by inducing TGFβ-mediated checkpoints (2023) · cites this paper as [18]

    The Results sections on PU.1 co-localization and natural genetic variation (pages not provided) report that SMAD motifs, including a SMAD3 recognition motif, are associated with PU.1 binding at microglia-specific sites. They do not demonstrate that PU.1 directly binds SMAD3 or establish that this interaction creates a homeostatic gene regulatory landscape. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Most microglial signature genes are downregulated in culture.

    “Most signature genes were downregulated by cells in culture (Fig. 6F), consistent with prior reports (Butovsky et al., 2014; Gosselin et al., 2014).”
  • Microglia rapidly de-differentiate in culture.

    “Our findings that microglia rapidly de-differentiate in culture reecho and expand upon previous reports (Butovsky et al., 2014; Gosselin et al., 2014).”
  • Given the distinct genetic and transcriptomic profile of microglia and macrophages identified via high throughput sequencing technology, the two cell types likely maintain different roles in the injured CNS.

    “Given the distinct genetic and transcriptomic profile of microglia and macrophages identified via high throughput sequencing technology (69–71), the two cell types likely maintain different roles in the injured central nervous system (CNS) (72–74).”
  • During normal CNS function, microglia have a resting or homeostatic transcriptome profile that reflects a surveilling activity.

    “During normal CNS function, microglia have a “resting,” or homeostatic, transcriptome profile that reflects a surveilling activity (36–41) (Figure 1).”

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Authors
Gosselin, D., Link, V. M., Romanoski, C. E., Fonseca, G. J., Eichenfield, D. Z., Spann, N. J., Stender, J. D., Chun, H. B., Garner, H., Geissmann, F., & Glass, C. K.
Affiliations
  • University of California San Diego (US)
  • King's College London (GB)
Corresponding author
Glass, Christopher K.
Venue
Cell
Publisher
Elsevier BV
Published
2014-12
Volume
159
Issue
6
Pages
1327-1340
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2163774748
Cited by
1,307
References
56
Citations by year
2026: 77 · 2025: 84 · 2024: 91 · 2023: 92 · 2022: 106 · 2021: 133 · 2020: 145 · 2019: 117 · 2018: 120 · 2017: 129 · 2016: 120 · 2015: 91
FWCI
46.44
Type
journal article
Language
en
Update notices
erratum (2015-01-15)
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • Research Portal (King's College London) (submittedVersion)
Funders
  • American Heart Association
  • Wellcome Trust (WT101853MA, 101853)
  • National Institutes of Health
  • University of California, San Diego
  • Canadian Institutes of Health Research
  • Biotechnology and Biological Sciences Research Council (1168004)
  • National Heart, Lung, and Blood Institute (K99HL123485, 1K99HL12348, P01HL088093)
  • National Cancer Institute (R01CA173903, R01CA052599, P30CA023100, CA17390)
  • National Institute of General Medical Sciences (GM 085764, P50GM085764, T32GM007198)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK063491, DK091183, P01DK074868, P30DK063491, R01DK091183)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
tissue-specific macrophages, enhancers, microglia, peritoneal macrophages, PU.1, transcription factor binding motifs, natural genetic variation, tissue environment, gene expression regulation
MeSH terms
Animals, Enhancer Elements, Genetic, Macrophages, Male, Mice, Inbred C57BL, Mice, Inbred Strains, Transcription Factors, Genetic Variation, Mice, Inbred NOD, Histone Code

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