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Ann Plast Surg. 2007 Aug;59(2):207-13.

In vitro analysis of transforming growth factor-beta1 inhibition in novel transgenic SBE-luciferase mice.

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Section of Plastic Surgery, Department of Veterans Affairs and Division of Plastic Surgery, Stanford University Medical Center, Stanford, CA 94305, USA.



Transforming growth factor beta1 (TGF-beta1) expression correlates with scarring. A novel transgenic mouse model with a Smad2/3-responsive luciferase reporter construct (SBE-luc) has been developed. We hypothesized that bioluminescence in SBE-luc dermal fibroblasts could be measured to assess TGF-beta1 inhibition.


Cultured dermal fibroblasts from SBE-luc mice were treated simultaneously with TGF-beta1 and increasing doses of either neutralizing antibody to TGF-beta (NA-TGFbeta) or SB-431542, a novel TGF-beta receptor kinase inhibitor. Fibroblasts were measured for luciferase activity. SBE-luc fibroblasts underwent Western blot analysis for collagen type I production.


TGF-beta1 produced maximal luciferase activity in SBE-luc fibroblasts at 0.1 ng/mL (P < 0.05). NA-TGFbeta and SB-431542 inhibited luciferase activity in a dose-dependent fashion, with complete inhibition achieved by 0.1 microg/mL and 1 microM, respectively (P < 0.05). NA-TGFbeta and SB-431542 inhibited collagen type I production.


Our in vitro results provide validation for further in vivo real-time imaging studies using the SBE-luc mouse as a novel wound-healing model.

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