Evidence map›Paper›PMID 18354229›Full record

ArticleJournal of immunology (Baltimore, Md. : 1950)2008

Macrophages produce TGF-beta-induced (beta-ig-h3) following ingestion of apoptotic cells and regulate MMP14 levels and collagen turnover in fibroblasts.

Natalia Nacu, Irina G Luzina, Kendrick Highsmith, Virginia Lockatell, Kerill Pochetuhen, Zachary A Cooper, Michael P Gillmeister, Nevins W Todd, Sergei P Atamas

Open access · bronzeAbstract read
In one paragraph

Article in Journal of immunology (Baltimore, Md. : 1950), 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
69citing papers in PubMed, 1 pooled it
1.7field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

69 citing papers in PubMed, 1 synthesis or guideline pooled it, 105 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Review
  6. The Immune Microenvironment: New Therapeutic Implications in Organ Fibrosis.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Review
  7. Review
  8. Cell Cross-Talk in Alveolar Microenvironment: From Lung Injury to Fibrosis.American journal of respiratory cell and molecular biology · 2024
    Review
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Review
  19. Article
  20. Review

9 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Natalia NacuUniversity of Maryland School of Medicine, Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201, USA.
Irina G Luzina
Kendrick Highsmith
Virginia Lockatell
Kerill Pochetuhen
Zachary A Cooper
Michael P Gillmeister
Nevins W Todd
Sergei P Atamas
University of Maryland, Baltimore · USBaltimore VA Medical Center · USVeterans Health Administration · USSociety of Surgical Oncology · US

Funding

Molecular Mechanism of PARC-Mediated Lung FibrosisR01HL074067 · NHLBI · UNIVERSITY OF MARYLAND BALTIMORE · PI ATAMAS, SERGEI P · 2004 to 2007
$928k
INTEGRIN-DEPENDENT T CELL-MEDIATED MECHANISMS OF PULMONARY FIBROSISR03AR054946 · NIAMS · UNIVERSITY OF MARYLAND BALTIMORE · PI LUZINA, IRINA G. · 2008 to 2010
$224k
NHLBI NIH HHS 1 R01 HL 074067NHLBI NIH HHS R01 HL074067NIAMS NIH HHS R03 AR054946
6 · The paper itself

Abstract

Phagocytic clearance of apoptotic cells by macrophages is an essential part in the resolution of inflammation. It coincides with activation of repair mechanisms, including accumulation of extracellular matrix. A possible link between clearance of apoptotic debris and accumulation of extracellular matrix has not been investigated. Production of collagen was measured in primary fibroblasts cocultured with macrophages. Ingestion of apoptotic cells by monocyte-derived macrophages led to up-regulation of collagen. Direct contact between macrophages and fibroblasts was not required for collagen up-regulation. Macrophages produced TGF-beta following ingestion of apoptotic cells, but the levels of this cytokine were lower than those required for a significant up-regulation of collagen. Simultaneously, the levels of TGF-beta-induced (TGFBI), or keratoepithelin/BIGH3, mRNA and protein were increased. In contrast, primary alveolar macrophages stimulated collagen production without exposure to apoptotic cells; there was no further increase in the levels of TGFBI, mRNA or protein, or collagen after ingestion of apoptotic cells. Stimulation of fibroblasts with TGFBI down-regulated MMP14 levels, decreased DNA binding by p53, increased DNA binding by PU.1, and up-regulated collagen protein but not mRNA levels. Overexpression of MMP14 or p53, or small interfering RNA-mediated inhibition of PU.1 led to an increase in MMP14 and a decline in collagen levels, whereas small interfering RNA-mediated inhibition of MMP14 led to elevation of collagen levels. In conclusion, monocyte-derived but not alveolar macrophages produce TGFBI following ingestion of apoptotic cells, leading to the down-regulation of MMP14 levels in fibroblasts through a mechanism involving p53 and PU.1, and to subsequent accumulation of collagen.

Indexed as

ApoptosisbetaIG-H3 ProteinCells, CulturedCoculture TechniquesCollagenDNAExtracellular Matrix ProteinsFibroblastsHumansMacrophagesMatrix Metalloproteinase 14Protein BindingProto-Oncogene ProteinsProto-Oncogene Protein Spi-1Trans-ActivatorsTransforming Growth Factor betabetaIG-H3 ProteinCollagenDNAExtracellular Matrix ProteinsMatrix Metalloproteinase 14MMP14 protein, humanProto-Oncogene ProteinsProto-Oncogene Protein Spi-1Trans-ActivatorsTransforming Growth Factor betaTumor Suppressor Protein p53

Identifiers

PMID18354229
PMCPMC2847349
OpenAlexW1668341482

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.