Cited by 367MicroRNA in disease regulationImmune cells in cancerImmune Response and Inflammation

Identifying Functional MicroRNAs in Macrophages with Polarized Phenotypes

Open access
Graff, Joel W., Dickson, Anne M., Clay, Gwendolyn, McCaffrey, Anton P., Wilson, Mary E.·2012·Journal of Biological Chemistry

Abstract

Macrophages respond to external stimuli with rapid changes in expression of many genes. Different combinations of external stimuli lead to distinct polarized activation patterns, resulting in a spectrum of possible macrophage activation phenotypes. MicroRNAs (miRNAs) are small, noncoding RNAs that can repress the expression of many target genes. We hypothesized that miRNAs play a role in macrophage polarization. miRNA expression profiles were determined in monocyte-derived macrophages (MDMs) incubated in conditions causing activation toward M1, M2a, M2b, or M2c phenotypes. One miRNA guide strand and seven miRNA passenger strands were significantly altered. Changes were confirmed in MDMs from six separate donors. The amplitude of miRNA expression changes in MDMs was smaller than described studies of monocytes responding to inflammatory stimuli. Further investigation revealed this correlated with higher basal miRNA expression in MDMs compared with monocytes. The regulation of M1- and M2b-responsive miRNAs (miR-27a, miR-29b, miR-125a, miR-146a, miR-155, and miR-222) was similar in differentiated THP-1 cells and primary MDMs. Studies in this model revealed cross-talk between IFNγ- and LPS-associated pathways regulating miRNA expression. Furthermore, expression of M1-associated transcripts was increased in THP-1 cells transfected with mimics of miR-29b, miR-125a-5p, or miR-155. The apparent inflammatory property of miR-29b and miR-125a-5p can be at least partially explained by repression of TNFAIP3, a negative regulator of NF-κB signaling. Overall, these data suggest miRNAs can contribute to changes in macrophage gene expression that occur in different exogenous activating conditions. Macrophages respond to external stimuli with rapid changes in expression of many genes. Different combinations of external stimuli lead to distinct polarized activation patterns, resulting in a spectrum of possible macrophage activation phenotypes. MicroRNAs (miRNAs) are small, noncoding RNAs that can repress the expression of many target genes. We hypothesized that miRNAs play a role in macrophage polarization. miRNA expression profiles were determined in monocyte-derived macrophages (MDMs) incubated in conditions causing activation toward M1, M2a, M2b, or M2c phenotypes. One miRNA guide strand and seven miRNA passenger strands were significantly altered. Changes were confirmed in MDMs from six separate donors. The amplitude of miRNA expression changes in MDMs was smaller than described studies of monocytes responding to inflammatory stimuli. Further investigation revealed this correlated with higher basal miRNA expression in MDMs compared with monocytes. The regulation of M1- and M2b-responsive miRNAs (miR-27a, miR-29b, miR-125a, miR-146a, miR-155, and miR-222) was similar in differentiated THP-1 cells and primary MDMs. Studies in this model revealed cross-talk between IFNγ- and LPS-associated pathways regulating miRNA expression. Furthermore, expression of M1-associated transcripts was increased in THP-1 cells transfected with mimics of miR-29b, miR-125a-5p, or miR-155. The apparent inflammatory property of miR-29b and miR-125a-5p can be at least partially explained by repression of TNFAIP3, a negative regulator of NF-κB signaling. Overall, these data suggest miRNAs can contribute to changes in macrophage gene expression that occur in different exogenous activating conditions.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1074/jbc.m111.327031

Cites

39 of 39 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Graff et al. found increases of miR-125a-3p, miR-155-5p, miR-155-3p in M1, miR-193b in M2a, miR-27a-5p, miR-155-5p, miR-155-3p in M2b and decreases of miR-26a-2-3p and miR-29b-1-5p in both M1 and M2a.

    “They noticed increases of miR-125a-3p, miR-155-5p, miR-155-3p in M1, miR-193b in M2a, miR-27a-5p, miR-155-5p, miR-155-3p in M2b and decreases of miR-26a-2-3p, and miR-29b-1-5p in both M1 and M2a.”

    From MicroRNAs as Regulators of Phagocytosis (2022) · cites this paper as [195]

    The Results report increased miR-125a-3p in M1, miR-193b in M2a, and miR-27a* in M2b; they also report miR-155* induction in M1 and M2b. But the Results place co-regulation of miR-26a-2* and miR-29b-1* in M1 and M2b, not M1 and M2a as claimed. The paper also cautions that most corresponding guide-strand changes in macrophages did not reach statistical significance. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Graff, J. W., Dickson, A. M., Clay, G., McCaffrey, A. P., & Wilson, M. E.
Affiliations
University of Iowa (US)
Corresponding author
Wilson, Mary E.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-06
Volume
287
Issue
26
Pages
21816-21825
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2077124851
Cited by
367
References
39
Citations by year
2026: 2 · 2025: 14 · 2024: 18 · 2023: 20 · 2022: 26 · 2021: 31 · 2020: 29 · 2019: 25 · 2018: 23 · 2017: 33 · 2016: 48 · 2015: 36 · 2014: 28 · 2013: 28 · 2012: 6
FWCI
10.41
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute of General Medical Sciences (T32GM007337)
  • National Institute of Allergy and Infectious Diseases (R01AI076233, R01AI045540, T32AI007343, R01AI067874, R21AI080801, T32AI007511)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
macrophage polarization, microRNA, monocyte-derived macrophages, M1 macrophages, M2 macrophages, miR-29b, miR-125a-5p, miR-155, miR-27a, miR-222, miR-146a, miR-296, interferon-gamma signaling, LPS signaling, A20, NF-κB signaling, THP-1 cells, miRNA mimics
MeSH terms
Cell Differentiation, Humans, Inflammation, Interferon-gamma, Leukocytes, Lipopolysaccharides, Macrophages, Monocytes, Phenotype, Gene Expression Regulation, Neoplastic, Cytokines, Chemokines, MicroRNAs, Cell Line, Tumor, HEK293 Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review