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The Journal of Clinical Investigation logoLink to The Journal of Clinical Investigation
. 1996 Dec 15;98(12):2894–2902. doi: 10.1172/JCI119118

Particle-mediated gene transfer with transforming growth factor-beta1 cDNAs enhances wound repair in rat skin.

S I Benn 1, J S Whitsitt 1, K N Broadley 1, L B Nanney 1, D Perkins 1, L He 1, M Patel 1, J R Morgan 1, W F Swain 1, J M Davidson 1
PMCID: PMC507757  PMID: 8981938

Abstract

Based on preliminary but variable results with direct DNA transfer into wounds, we evaluated in vivo gene transfer by particle-mediated DNA delivery to rat skin to determine whether overexpression of TGF-beta1 at the site of skin incisions would result in a significant improvement in repair. Optimization of the method with viral promoter-luciferase reporter constructs indicated that expression of luciferase activity persisted up to 5 d and was promoter, pressure, and site dependent (ventral > dorsal). Using cytomegalovirus (CMV)-driven human alpha1-antitrypsin, transgene expression was immunolocalized within keratinocytes of the stratum granulosum at 24 h. We measured tensile strength of skin incisions at 11-21 d in both normal and diabetic rats transfected with TGF-beta1 expression vectors at surgery. Native murine TGF-beta1 under an SV40 promoter produced positive effects, while wound strengthening was more pronounced in diabetic animals using a CMV-driven construct. Transfection of rat skin with constitutively active, mutant porcine TGF-beta1 under the control of the CMV and Moloney murine leukemia virus promoters significantly increased tensile strength up to 80% for 14-21 d after surgery. Transfection 24 h before surgery was more effective. Particle-mediated gene delivery can be used to deliver viral promoter-cytokine expression constructs into rat skin in a safe, efficient, and reproducible fashion. The extent of wound repair, as evidenced by enhanced tensile strength, can be markedly improved in tissues transfected with TGF-beta1 expression constructs.

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Selected References

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