Hypertrophic versus non hypertrophic scars compared by immunohistochemistry and laser confocal microscopy: Type i and III collagens

Gisele V. Oliveira, Hal K. Hawkins, David Chinkes, Ann Burke, Andre Luiz Pasqua Tavares, Marcia Ramos-E-Silva, Thomas B. Albrecht, Gregory T. Kitten, David N. Herndon

Research output: Contribution to journalArticle

53 Scopus citations

Abstract

Although dermal collagens appear increased in hypertrophic scars, this has not been tested in tissue samples using objective methods. We compared the expression of types I and III collagen in hypertrophic and non hypertrophic scars at 6-12 and 18-24 months after burn using a quantitative method. Among 17 patients with extensive burns, 3 patients had acute scars, 8 had hypertrophic or non hypertrophic scars at 6-12 months after burn and 6 had hypertrophic or non hypertrophic scars at 18-24 months after burn. After clinical assessment of scars using the Vancouver scale, immunohistochemistry for types I and III collagens was performed. Images were captured with a laser scanning confocal microscope and the relative amounts of types I and III collagens were determined in superficial and deep dermis. The effects of time and scar type were assessed using two-way analysis of variance (ANOVA) and Tukey's test. Collagen III scar/normal ratios were higher in hypertrophic scars at both time points (P = 0.05). There were no differences in collagen I scar/normal ratios. Large variation was observed in scars during the acute phase regarding the expression of collagens. Easily accessed by immunohistochemistry and confocal microscopy, type III collagen deposition may help in determining scar phenotype, differentiating hypertrophic and non hypertrophic scars.

Original languageEnglish (US)
Pages (from-to)445-452
Number of pages8
JournalInternational Wound Journal
Volume6
Issue number6
DOIs
StatePublished - Dec 1 2009

Keywords

  • Confocal microscopy
  • Hypertrophic scar
  • Immunohistochemistry
  • Type I collagen
  • Type III collagen

ASJC Scopus subject areas

  • Surgery
  • Dermatology

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    Oliveira, G. V., Hawkins, H. K., Chinkes, D., Burke, A., Tavares, A. L. P., Ramos-E-Silva, M., Albrecht, T. B., Kitten, G. T., & Herndon, D. N. (2009). Hypertrophic versus non hypertrophic scars compared by immunohistochemistry and laser confocal microscopy: Type i and III collagens. International Wound Journal, 6(6), 445-452. https://doi.org/10.1111/j.1742-481X.2009.00638.x