Abstract |
Transforming growth factor ( TGF)-beta family members regulate multiple aspects of wound repair through effects on cell proliferation, matrix production, and tissue inflammation, but the effects of TGF-beta on wound closure itself have been controversial. We found that blocking antibodies to TGF-beta enhanced the degree of closure of scratch wounds in primary airway epithelial monolayers, while addition of exogenous TGF-beta1 inhibited the degree of closure, suggesting that endogenous activation of TGF-beta normally serves as a brake on the degree of wound closure. Although these cells secreted large amounts of TGF-beta2 and small amounts of TGF-beta1, blockade of TGF-beta1 enhanced the degree of wound closure, whereas blockade of TGF-beta2 had no effect. TGF-beta1 (but not TGF-beta2) can be activated by two members of the integrin family, alphavbeta6 and alphavbeta8, which are both expressed on airway epithelial cells. Wounding induced activation of TGF-beta through effects of both integrins, but antibodies against alphavbeta8 enhanced the degree of wound closure, whereas antibodies against alphavbeta6 did not.
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Authors | Claus Neurohr, Stephen L Nishimura, Dean Sheppard |
Journal | American journal of respiratory cell and molecular biology
(Am J Respir Cell Mol Biol)
Vol. 35
Issue 2
Pg. 252-9
(Aug 2006)
ISSN: 1044-1549 [Print] United States |
PMID | 16574941
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Chemical References |
- Antibodies, Monoclonal
- Integrins
- Recombinant Proteins
- TGFB1 protein, human
- TGFB2 protein, human
- Transforming Growth Factor beta
- Transforming Growth Factor beta1
- Transforming Growth Factor beta2
- Transforming Growth Factor beta3
- integrin alphavbeta8
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Topics |
- Antibodies, Monoclonal
(pharmacology)
- Bronchi
(cytology)
- Cell Culture Techniques
- Cells, Cultured
- Epithelial Cells
(drug effects, metabolism)
- Humans
- Integrins
(metabolism)
- Recombinant Proteins
(metabolism)
- Transforming Growth Factor beta
(genetics, metabolism)
- Transforming Growth Factor beta1
- Transforming Growth Factor beta2
- Transforming Growth Factor beta3
- Wound Healing
(physiology)
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