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Archives of Dermatological Research

, Volume 302, Issue 10, pp 705–715 | Cite as

Phenotypic profiling of keloid scars using FT-IR microspectroscopy reveals a unique spectral signature

  • Katherine A. Hollywood
  • Marlies Maatje
  • Iqbal T. Shadi
  • Alex Henderson
  • Duncan Angus McGrouther
  • Royston Goodacre
  • Ardeshir Bayat
Original Paper

Abstract

Keloid disease (KD) is a quasineoplastic fibroproliferative tumour of unknown origin causing a progressive, recurrent dermal lesion. KD is not homogeneous in nature and shows phenotypic structural differences between its distinct peripheral margins compared to its centre. The keloid margin is often symptomatically more active with increased dermal cellularity, compared to a symptomatically dormant and hypocellular centre of lesion. The aim of this study was to delineate the morphological components of a keloid scar tissue by measuring the differences between various anatomical locations within the keloid tissue, such as the margin and the centre of the lesion compared to its surrounding normal skin using Fourier transform infrared (FT-IR) microspectroscopy. FT-IR microspectroscopy is a technique that produces spectra with detailed molecular biochemical information inherent of the chemical structure. Chemical maps were constructed on extralesional cross sections taken from six keloid scars. H&E stained sections were used to confirm diagnosis of keloid and orientate the experimental cross sections prior to FT-IR. Spectral band assignment and principal components analysis were conducted. Distinct vibrational bands (100 spectra) were observed using FT-IR spectroscopy. Partial least squares discriminant analysis, with bootstrapping (10,000 analyses), identified whether a spectrum was from the keloid or normal tissue showing an average accuracy of 84.8%, precision of 80.4%, specificity of 76.2%, and sensitivity of 92.9%. FT-IR microspectroscopy showed significant differences in spectral profiles in keloid tissue in different anatomical locations within the cross section. We believe that this proof-of-concept study may help substantiate the use of FTIR spectroscopy in keloid diagnosis and prognosis.

Keywords

Keloid disease Abnormal raised dermal scarring Fourier transform infrared spectroscopy Extralesional biopsy excision Histological diagnosis Active periphery or margin of lesion 

Notes

Acknowledgments

We would like to acknowledge the support of the following organizations for this study: NIHR (UK). In addition we would like to specially thank the GAT Family Foundation, and Steve and Kathy Fitzpatrick for generous funding and support. K.A.H. thanks Stiefel Laboratories (U.K.) Ltd. for her studentship and R.G. is very thankful to UK BBSRC for funding.

Conflict of interest

The authors state no conflict of interests.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Katherine A. Hollywood
    • 3
  • Marlies Maatje
    • 1
  • Iqbal T. Shadi
    • 3
  • Alex Henderson
    • 4
  • Duncan Angus McGrouther
    • 2
  • Royston Goodacre
    • 3
  • Ardeshir Bayat
    • 1
    • 2
  1. 1.Plastic and Reconstructive Surgery Research, Manchester Interdisciplinary BiocentreUniversity of ManchesterManchesterUK
  2. 2.Manchester Academic Health Science Centre, Department of Plastic and Reconstructive SurgeryUniversity Hospital of South Manchester NHS Foundation Trust, Wythenshawe HospitalManchesterUK
  3. 3.School of Chemistry and Manchester Interdisciplinary BiocentreThe University of ManchesterManchesterUK
  4. 4.School of Chemical Engineering and Analytical Science, Manchester Interdisciplinary BiocentreUniversity of ManchesterManchesterUK

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