Cited by 196Gastrointestinal motility and disordersNeuroinflammation and Neurodegeneration MechanismsGenetics, Aging, and Longevity in Model Organisms

Age-dependent shift in macrophage polarisation causes inflammation-mediated degeneration of enteric nervous system

Open access
Becker, Laren, Nguyen, Linh, Gill, Jaspreet, Kulkarni, Subhash, Pasricha, Pankaj Jay, Habtezion, Aida·2018·Gut

Abstract

Objective: The enteric nervous system (ENS) undergoes neuronal loss and degenerative changes with age. The cause of this neurodegeneration is poorly understood. Muscularis macrophages residing in close proximity to enteric ganglia maintain neuromuscular function via direct crosstalk with enteric neurons and have been implicated in the pathogenesis of GI motility disorders like gastroparesis and postoperative ileus. The aim of this study was to assess whether ageing causes alterations in macrophage phenotype that contributes to age-related degeneration of the ENS. Design: Longitudinal muscle and myenteric plexus from small intestine of young, mid-aged and old mice were dissected and prepared for whole mount immunostaining, flow cytometry, Luminex immunoassays, western blot analysis, enteric neural stem cell (ENSC) isolation or conditioned media. Bone marrow derived macrophages were prepared and polarised to classic (M1) or alternative (M2) activation states. Markers for macrophage phenotype were measured using quantitative RT-PCR. Results: Ageing causes a shift in macrophage polarisation from anti-inflammatory ‘M2’ to proinflammatory ‘M1’ that is associated with a rise in cytokines and immune cells in the ENS. This phenotypic shift is associated with a neural response to inflammatory signals, increase in apoptosis and loss of enteric neurons and ENSCs, and delayed intestinal transit. An age-dependent decrease in expression of the transcription factor FoxO3, a known longevity gene, contributes to the loss of anti-inflammatory behaviour in macrophages of old mice, and FoxO3-deficient mice demonstrate signs of premature ageing of the ENS. Conclusions: A shift by macrophages towards a proinflammatory phenotype with ageing causes inflammation-mediated degeneration of the ENS.

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 · 10.1136/gutjnl-2016-312940

Cites

44 of 44 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?

  • Declining immune cell function and immunosenescence, together with increased epithelial barrier permeability, promotes elevated systemic inflammation termed inflammaging, contributing to functional decline in the intestine and CNS in old age.

    “This, together with declining immune cell function and immunosenescence, promotes a state of elevated systemic inflammation termed “inflammaging” [39, 40, 118], contributing to the functional decline in the intestine and CNS in old age [10, 13, 48].”
  • Loss of intestinal barrier integrity and elevated circulating pro-inflammatory cytokine concentrations are linked with the polarization of CNS microglia toward a pro-inflammatory phenotype and promote neurodegenerative disease.

    “Loss of intestinal barrier integrity and elevated circulating pro-inflammatory cytokine concentrations are linked with the polarization of CNS microglia toward a pro-inflammatory phenotype [11, 73, 109] and promote neurodegenerative disease [10, 13, 48].”

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
Becker, L., Nguyen, L., Gill, J., Kulkarni, S., Pasricha, P. J., & Habtezion, A.
Affiliations
  • Stanford Medicine (US)
  • Johns Hopkins University (US)
Corresponding author
Becker, Laren
Venue
Gut
Publisher
BMJ
Published
2017-02-21
Volume
67
Issue
5
Pages
827-836
ISSN
  • 0017-5749 (ISSN-L)
  • 1468-3288
OpenAlex
W2591085270
Cited by
196
References
44
Citations by year
2026: 27 · 2025: 43 · 2024: 21 · 2023: 26 · 2022: 29 · 2021: 15 · 2020: 12 · 2019: 11 · 2018: 10 · 2017: 2
FWCI
10.02
Type
journal article
Language
en
Open access
Locations
  • Gut (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (R21AG049622, R03AG045098)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK089502, K08DK103966, R01DK080920, P30DK116074)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
enteric nervous system, macrophage polarization, aging, neurodegeneration, M1/M2 macrophages, FOXO3, apoptosis, enteric neurons, intestinal motility, inflammation, small intestine, bone marrow-derived macrophages, cytokines
MeSH terms
Forkhead Box Protein O3, Aging, Animals, Cells, Cultured, Flow Cytometry, Gene Expression Regulation, Inflammation, Macrophages, Male, Mice, Inbred C57BL, Phenotype, Blotting, Western, Signal Transduction, Cytokines, Apoptosis, Enteric Nervous System, Mice, Real-Time Polymerase Chain Reaction

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