Evidence map›Paper›PMID 19734317›Full record

ArticleAmerican journal of physiology. Lung cellular and molecular physiology2009

Mesenchymal stem cells produce Wnt isoforms and TGF-beta1 that mediate proliferation and procollagen expression by lung fibroblasts.

Keith D Salazar, Susan M Lankford, Arnold R Brody

Open access · greenAbstract read
In one paragraph

Article in American journal of physiology. Lung cellular and molecular physiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed, 1 pooled it
8.8field-weighted citation impact, top 2% 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

65 citing papers in PubMed, 1 synthesis or guideline pooled it, 137 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Fibrosis in Immune-Mediated and Autoimmune Disorders.Journal of clinical medicine · 2025
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5 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

3 authors at 1 institution in 1 country.

Keith D SalazarDepartment of Molecular Biomedical Sciences, North Carolina State University, 4700 Hillsborough St., Raleigh, NC 27606, USA.
Susan M Lankford
Arnold R Brody
North Carolina State University · US

Funding

TNF-alpha to TGF-beta Signal TransductionR01ES006766 · NIEHS · TULANE UNIVERSITY OF LOUISIANA · PI BRODY, ARNOLD RALPH · 1994 to 2008
$2.4M
TGF-B in Interstitial Lung DiseaseR01HL060532 · NHLBI · TULANE UNIVERSITY OF LOUISIANA · PI BRODY, ARNOLD RALPH · 1997 to 2005
$1.9M
NHLBI NIH HHS HL-60532NIEHS NIH HHS ES-06766
6 · The paper itself

Abstract

Studies have been carried out previously to determine whether mesenchymal stem cells (MSC) influence the progression of pulmonary fibrosis. Here, we asked whether MSC (derived from mouse bone marrow and human umbilical cord blood) produce factors that mediate lung fibroblast (LF) growth and matrix production. MSC-conditioned media (CM) were found by ELISA to contain significant amounts of PDGF-AA and transforming growth factor-beta1 (TGF-beta1). Proliferation was increased in a concentration-dependent manner in LF cell lines and primary cells cultured in MSC-CM, but neither anti-PDGF antibodies nor PDGF receptor-specific antibodies affected proliferation, nor did a number of other antibodies to well-known mitogenic factors. However, proliferation was significantly inhibited by the Wnt signaling antagonist, secreted frizzled related protein-1 (sFRP-1). In addition, anti-Wnt1 and anti-Wnt2 antibodies attenuated MSC-CM-induced proliferation, and increased expression of Wnt7b was identified. As would be expected in cells activated by Wnt, nuclear beta-catenin was increased. The amount of TGF-beta1 in MSC-CM and its biological activity were revealed by activation at acidic pH. The stem cells synthesized and released TGF-beta1 that increased alpha1-procollagen gene expression by LF target cells. Addition of anti-TGF-beta to the MSC-CM blocked upregulation of collagen gene expression. These data demonstrate that MSC from mice and humans produce Wnt proteins and TGF-beta1 that respectively stimulate LF proliferation and matrix production, two hallmarks of fibroproliferative lung disease. It will be essential to determine whether these factors can play a role in attempts to use MSC for therapeutic approaches.

Indexed as

AnimalsAntibodiesbeta CateninBone Marrow CellsCell ProliferationCoculture TechniquesCollagen Type ICulture Media, ConditionedFetal BloodFibroblastsFrizzled-Related ProteinsGene Expression RegulationHumansIntracellular Signaling Peptides and ProteinsLungMesenchymal Stem CellsAntibodiesbeta CateninCollagen Type ICulture Media, ConditionedFrizzled-Related ProteinsIntracellular Signaling Peptides and ProteinsPlatelet-Derived Growth Factorplatelet-derived growth factor AProtein IsoformsProteinsTransforming Growth Factor beta1Wnt Proteins

Identifiers

PMID19734317
PMCPMC2777498
OpenAlexW2099870390

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.