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Changes in gene expression in pressure ulcers debrided by different approaches - a pilot study.

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This study compared gene expression in pressure ulcers (PUs) treated with sharp debridement versus the Versajet® hydrosurgery system. Preliminary findings indicate no significant gene expression differences, except for NFE2L2, between the two PU treatment methods.

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Area of Science:

  • Wound Healing Research
  • Molecular Biology
  • Surgical Innovation

Background:

  • Pressure ulcers (PUs) are chronic wounds often requiring surgical intervention for deep categories (III and IV).
  • Sharp surgical debridement is a standard treatment, but the Versajet® hydrosurgery system offers advantages for tangential excision.
  • Understanding molecular responses to different debridement methods is crucial for optimizing PU treatment.

Purpose of the Study:

  • To compare the gene expression profiles of pressure ulcers (PUs) following debridement by sharp surgical methods versus the Versajet® hydrosurgery system.
  • To investigate the expression of genes related to oxidative stress, cell proliferation, and angiogenesis in PUs treated with these distinct debridement techniques.
  • To explore potential correlations between gene expression patterns and the healing process in PUs.

Main Methods:

  • Gene expression analysis of NFE2L2, ACTA2, NFKB1, VEGFA, MKI67, HMOX1, HMOX2, HIF1A, and SOD2 in PU tissue samples.
  • Utilized sharp surgical debridement and Versajet® hydrosurgery system for wound debridement in five patients.
  • Employed ACTB and PSMB as housekeeping genes for normalization.

Main Results:

  • Preliminary results show no significant differences in overall gene expression between the two debridement methods, with the exception of NFE2L2.
  • Despite macroscopic differences in wound appearance, molecular responses did not significantly diverge initially.
  • Identified significant correlations between the expression of HIF1A and SOD2, VEGFA and SOD2, and VEGFA and HIF1A.

Conclusions:

  • The choice of debridement method (sharp surgical vs. Versajet®) may not significantly alter the expression of most studied genes in early-stage PU treatment.
  • Observed correlations suggest a potential link between hypoxia (HIF1A), oxidative stress (SOD2), and angiogenesis (VEGFA) in pressure ulcer healing.
  • Further research with a larger patient cohort is warranted to confirm these preliminary findings and elucidate the molecular mechanisms underlying PU healing.