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Simvastatin enhances VEGF production and ameliorates impaired wound healing in experimental diabetes

Alessandra Bitto1, Letteria Minutoli, Domenica Altavilla

  • 1Department of Clinical and Experimental Medicine and Pharmacology, Section of Pharmacology, University of Messina, Italy.

Pharmacological Research
|March 5, 2008
PubMed

Insights

Simvastatin, a cholesterol-lowering drug, significantly improves wound healing in diabetic mice by increasing vascular endothelial growth factor (VEGF) and promoting angiogenesis. This suggests potential therapeutic applications for diabetes-related healing defects.

Area of Science:

  • Biomedical research
  • Pharmacology
  • Wound healing research

Background:

  • Statins possess properties beyond cholesterol reduction, including the stimulation of angiogenesis.
  • Diabetes mellitus is associated with impaired wound healing, necessitating novel therapeutic strategies.

Purpose of the Study:

  • To investigate the efficacy of simvastatin in improving wound healing in a diabetic mouse model.
  • To elucidate the mechanisms underlying simvastatin's effects on wound healing, focusing on vascular endothelial growth factor (VEGF) and angiogenesis.

Main Methods:

  • An incisional skin wound model was utilized in diabetic (db+/db+) and normoglycemic (db+/+m) mice.
  • Animals were treated with simvastatin or vehicle, and wound healing was assessed through measurements of VEGF expression, nitric oxide content, breaking strength, and CD31 immunostaining at various time points.
  • The role of VEGF was confirmed using passive immunization with anti-VEGF antibodies.

Main Results:

  • Simvastatin administration significantly increased VEGF mRNA and protein expression in diabetic mouse wounds.
  • The treatment enhanced nitric oxide levels, wound breaking strength, and angiogenesis (CD31 staining).
  • Simvastatin effectively restored impaired wound healing in diabetic mice, with similar benefits observed in normoglycemic mice. Anti-VEGF antibody administration negated these benefits.

Conclusions:

  • Simvastatin demonstrates significant potential in treating diabetes-related wound healing disorders.
  • The pro-healing effects of simvastatin are mediated, at least in part, through the upregulation of VEGF and subsequent promotion of angiogenesis.

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