Archives of Dermatological Research

, Volume 305, Issue 3, pp 205–214

Photodynamic therapy: an innovative approach to the treatment of keloid disease evaluated using subjective and objective non-invasive tools

Authors

  • Sara Ud-Din
    • Faculty of Medical and Human Sciences, Institute of Inflammation and Repair, Manchester Academic Health Science CentreUniversity Hospital of South Manchester NHS Foundation Trust, University of Manchester
    • Plastic and Reconstructive Surgery Research, Manchester Institute of BiotechnologyUniversity of Manchester
  • Grace Thomas
    • Faculty of Medical and Human Sciences, Institute of Inflammation and Repair, Manchester Academic Health Science CentreUniversity Hospital of South Manchester NHS Foundation Trust, University of Manchester
    • Plastic and Reconstructive Surgery Research, Manchester Institute of BiotechnologyUniversity of Manchester
  • Julie Morris
    • Medical StatisticsUniversity Hospital of South Manchester NHS Foundation Trust
    • Faculty of Medical and Human Sciences, Institute of Inflammation and Repair, Manchester Academic Health Science CentreUniversity Hospital of South Manchester NHS Foundation Trust, University of Manchester
    • Plastic and Reconstructive Surgery Research, Manchester Institute of BiotechnologyUniversity of Manchester
Original Paper

DOI: 10.1007/s00403-012-1295-4

Cite this article as:
Ud-Din, S., Thomas, G., Morris, J. et al. Arch Dermatol Res (2013) 305: 205. doi:10.1007/s00403-012-1295-4

Abstract

Optimal management for keloid disease (KD) is ill defined, with surgical excision resulting in recurrence rates over 50 %. Photodynamic therapy (PDT) uses light to activate a photosensitiser localised in diseased tissues. Two recent case studies and in vitro studies on keloid-derived fibroblasts indicate potential use of PDT in treating KD. Therefore, we hypothesized that there may be a role for PDT in the treatment of KD. Twenty KD patients were divided into three groups; existing keloid scar, post-surgical debulking and post-total surgical excision. Patients underwent three treatments of PDT at weekly intervals. Methyl aminolevulinate photosensitiser applied 3 h prior to PDT, administered at 37 J/cm2. Non-invasive measures provided quantitative data for pliability, haemoglobin, melanin, collagen and flux. Pain and pruritus scores were measured and patients’ were monitored for KD recurrence. All patients had reduced pain and pruritus scores. Haemoglobin flux (p = 0.032), collagen (p = 0.066) and haemoglobin levels (p = 0.060) decreased from week 1 to 3 in all except one patient where measurements were taken and pliability increased significantly (p = 0.001). Increases in pliability were significantly related to decreases in flux (p = 0.001). Only one patient with a keloid in a stress-prone anatomical location experienced recurrence of KD. All other patients had no recurrence at 9-month follow-up. Minimal side effects were reported. In conclusion, PDT reduces scar formation in KD evidenced by decreased blood flow, increased pliability, decreased collagen and haemoglobin levels. These findings indicate potential utility of PDT in the treatment of KD.

Keywords

Keloid diseasePhotodynamic therapyScar treatmentsField therapyMethyl aminolevulinic acid

Abbreviations

ALA

5-Aminolevulinic acid

ATP

Adenosine 5-triphosphate

FLPI

Full-field laser perfusion imaging

IL-1 alpha

Interleukin-1 alpha

KD

Keloid disease

MAL

Methyl aminolevulinic acid

MMP

Matrix metalloproteinase

PDT

Photodynamic therapy

PpIX

Protoporphyrin 9

SIAscopy

Spectrophotometric intracutaneous analysis

TNF-alpha

Tumour necrosis factor-alpha

Supplementary material

403_2012_1295_MOESM1_ESM.pdf (183 kb)
Supplementary material 1 (PDF 183 kb)
403_2012_1295_MOESM2_ESM.pdf (172 kb)
Supplementary material 2 (PDF 171 kb)
403_2012_1295_MOESM3_ESM.pdf (241 kb)
Supplementary material 3 (PDF 240 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2012