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Murine Excisional Wound Healing Model and Histological Morphometric Wound Analysis
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Anti-microRNA-378a enhances wound healing process by upregulating integrin beta-3 and vimentin

Haoran Li1, Leslie Chang1, William W Du1

  • 11] Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada [2] Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.

Molecular Therapy : the Journal of the American Society of Gene Therapy
|June 24, 2014
PubMed

Insights

Inhibiting microRNA-378a (miR-378a) significantly accelerates wound healing. This occurs by increasing vimentin and β3 integrin, promoting cell migration and blood vessel formation for faster tissue repair.

Area of Science:

  • Biomedical Science
  • Molecular Biology
  • Regenerative Medicine

Background:

  • Delayed wound healing is a significant global health concern, particularly for individuals with diabetes and vascular atherosclerosis.
  • MicroRNAs (miRNAs) are recognized as crucial regulators influencing the complex processes involved in wound repair.
  • Identifying specific miRNAs that modulate wound healing can offer novel therapeutic targets.

Purpose of the Study:

  • To investigate the role of miR-378a in regulating wound healing processes.
  • To determine the downstream targets of miR-378a involved in cell migration and angiogenesis.
  • To evaluate the therapeutic potential of inhibiting miR-378a for enhanced wound healing.

Main Methods:

  • Generation of miR-Pirate378a transgenic mice with inhibited miR-378a-5p function.
  • In vitro cell migration assays using miR-Pirate378a-transfected cells.
  • Validation of vimentin and β3 integrin as direct targets of miR-378a.
  • Assessment of wound healing in mice treated with miR-Pirate378a-conjugated nanoparticles.

Main Results:

  • Transgenic mice with inhibited miR-378a exhibited significantly enhanced wound healing.
  • Vimentin and β3 integrin expression were markedly elevated in transgenic mice and miR-Pirate378a-transfected cells.
  • Inhibition of miR-378a promoted fibroblast migration and differentiation, and enhanced angiogenesis.
  • Nanoparticle-mediated delivery of miR-Pirate378a accelerated wound closure in vivo.

Conclusions:

  • Knockdown of miR-378a enhances wound healing by upregulating its target proteins, vimentin and β3 integrin.
  • Increased vimentin and β3 integrin facilitate fibroblast migration, differentiation, and angiogenesis, crucial for tissue repair.
  • Targeting miR-378a represents a promising therapeutic strategy for improving wound healing outcomes.

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