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Assessment of Acute Wound Healing using the Dorsal Subcutaneous Polyvinyl Alcohol Sponge Implantation and Excisional Tail Skin Wound Models.
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Assessment of Acute Wound Healing using the Dorsal Subcutaneous Polyvinyl Alcohol Sponge Implantation and Excisional Tail Skin Wound Models.

Published on: March 25, 2020

Role of TGF beta-mediated inflammation in cutaneous wound healing

Xiao-Jing Wang1, Gangwen Han, Philip Owens

  • 1Department of Otolaryngology, Oregon Health & Science University, Portland, Oregon 97239, USA. wangxiao@ohsu.edu

The Journal of Investigative Dermatology. Symposium Proceedings
|October 31, 2006
PubMed

Insights

Excessive transforming growth factor beta 1 (TGF-β1) delays wound healing by increasing inflammation. Tightly regulated TGF-β1 expression may improve healing outcomes, necessitating further research.

Area of Science:

  • Wound healing research
  • Molecular biology
  • Dermatology

Background:

  • Transforming growth factor beta 1 (TGF-β1) influences all stages of wound healing.
  • Both beneficial and detrimental effects of TGF-β1 on wound healing have been documented.
  • Mechanisms underlying TGF-β1's role in wound healing remain unclear.

Purpose of the Study:

  • To investigate the impact of constitutive and tightly regulated transforming growth factor beta 1 (TGF-β1) expression on cutaneous wound healing.
  • To elucidate the mechanisms behind TGF-β1's dual effects on wound repair.

Main Methods:

  • Utilized transgenic mice overexpressing wild-type TGF-β1 in keratinocytes (K5.TGF-β1wt).
  • Analyzed full-thickness wound healing progression and associated inflammatory responses.
  • Developed a gene-switch TGF-β1 transgenic system for temporal and level-controlled induction.

Main Results:

  • Constitutive overexpression of TGF-β1 in keratinocytes significantly delayed wound healing in K5.TGF-β1wt mice.
  • Delayed healing was characterized by prolonged and profound inflammation.
  • Endogenous TGF-β1 levels were transiently elevated post-injury.

Conclusions:

  • Excessive and prolonged TGF-β1 at wound sites impairs healing, partly due to pro-inflammatory effects.
  • Tightly regulated TGF-β1 expression is crucial for optimal wound healing.
  • The novel gene-switch TGF-β1 transgenic system offers a valuable tool for studying stage-specific TGF-β1 functions in skin wound repair.

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