Generating and reversing chronic wounds in diabetic mice by manipulating wound redox parameters

Sandeep Dhall, Danh C. Do, Monika Garcia, Jane Kim, Seyed H. Mirebrahim, Julia Lyubovitsky, Stefano Lonardi, Eugene A. Nothnagel, Neal Schiller, Manuela Martins-Green

Research output: Contribution to journalArticle

Abstract

By 2025, more than 500 M people worldwide will suffer from diabetes; 125 M will develop foot ulcer(s) and 20 M will undergo an amputation, creating a major health problem. Understanding how these wounds become chronic will provide insights to reverse chronicity. We hypothesized that oxidative stress (OS) in wounds is a critical component for generation of chronicity. We used the db/db mouse model of impaired healing and inhibited, at time of injury, two major antioxidant enzymes, catalase and glutathione peroxidase, creating high OS in the wounds. This was necessary and sufficient to trigger wounds to become chronic. The wounds initially contained a polymicrobial community that with time selected for specific biofilm-forming bacteria. To reverse chronicity we treated the wounds with the antioxidants -tocopherol and N-acetylcysteine and found that OS was highly reduced, biofilms had increased sensitivity to antibiotics, and granulation tissue was formed with proper collagen deposition and remodeling. We show for the first time generation of chronic wounds in which biofilm develops spontaneously, illustrating importance of early and continued redox imbalance coupled with the presence of biofilm in development of wound chronicity. This model will help decipher additional mechanisms and potentially better diagnosis of chronicity and treatment of human chronic wounds.

Original languageEnglish (US)
Article number562625
JournalJournal of diabetes research
Volume2014
DOIs
StatePublished - 2014
Externally publishedYes

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ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

Cite this

Dhall, S., Do, D. C., Garcia, M., Kim, J., Mirebrahim, S. H., Lyubovitsky, J., Lonardi, S., Nothnagel, E. A., Schiller, N., & Martins-Green, M. (2014). Generating and reversing chronic wounds in diabetic mice by manipulating wound redox parameters. Journal of diabetes research, 2014, [562625]. https://doi.org/10.1155/2014/562625