Persistence of TGF-β1 induction of increased fibroblast contractility

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Fibroblast contraction of collagen gels is regarded as a model of wound contraction. Transforming growth factor “TGF”-β added to such gels can augment contraction consistent with its suggested role as a mediator of fibrotic repair. Since fibroblasts isolated from fibrotic tissues have been suggested to express a "fibrotic phenotype," we hypothesized that TGF-β exposure may lead to a persistent increase in fibroblasts' contractility. To evaluate this question, confluent human fetal lung fibroblasts were treated with serum-free Dulbecco modified Eagle medium “DMEM”, with or without 100 nM TGF-β1, TGF-β2, or TGF-β3 for 48 h. Fibroblasts were then trypsinized and cast into gels composed of native type I collagen isolated from rat tail tendons. After 20 min for gelation, the gels were released and maintained in serum-free DMEM. TGF-β-pretreated fibroblasts caused significantly more rapid gel contraction “52.5 ± 0.6, 50.9 ± 0.2, and 50.3 ± 0.5% by TGF-β1, -β2, and -β3 pretreated fibroblasts, respectively” than control fibroblasts “74.0 ± 0.3%, P < 0.01”. This effect is concentration dependent “50-200 nM”, and all three isoforms had equal activity. The effect of TGF-β1, however, persisted for only a short period of time following the removal of TGF-β, and was lost with sequential passage. These observations suggest that the persistent increase in collagen-gel contractility, mediated by fibroblasts from fibrotic tissues, would not appear to be solely due to previous exposure of these cells to TGF-β.

Original languageEnglish (US)
Pages (from-to)193-201
Number of pages9
JournalIn Vitro Cellular and Developmental Biology - Animal
Volume37
Issue number3 I
DOIs
StatePublished - Jan 1 2001

Fingerprint

Fibroblasts
Gels
Collagen
Eagles
Transforming Growth Factors
Collagen Type I
Serum
Tendons
Tail
Protein Isoforms
Phenotype
Lung
Wounds and Injuries

Keywords

  • Collagen gel
  • Fibrosis
  • Lung
  • TGf-β

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

Cite this

Persistence of TGF-β1 induction of increased fibroblast contractility. / Liu, Xiang-de.

In: In Vitro Cellular and Developmental Biology - Animal, Vol. 37, No. 3 I, 01.01.2001, p. 193-201.

Research output: Contribution to journalArticle

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