Ultrastructural alteration of tape-stripped normal human skin after photodynamic therapy
(2004) In EJD. European Journal of Dermatology 14(2). p.91-95- Abstract
- The effect of photodynamic therapy on tape-stripped normal human skin was explored ultrastructurally. Back skin areas of 3 healthy Caucasian volunteers, 2 men and 1 woman, were tape-stripped 10 consecutive times followed by topical treatment with 5-aminolevulinic acid (20%, w/w) for 4 hours under occlusion (Tegaderm(R)). Then the areas were irradiated for 30 minutes with Waldman PDT 1200 lamp (570-650 nm) with a total dose of 70 J/cm(2). Full-thickness punch biopsies were taken immediately after irradiation, and at 3 and 24 hours for electron microscopy examination. Photodynamic therapy caused morphological alterations mainly in the epidermis. Keratinocytes became oedematous and tonofilament bundles were split, but desmosomes remained... (More)
- The effect of photodynamic therapy on tape-stripped normal human skin was explored ultrastructurally. Back skin areas of 3 healthy Caucasian volunteers, 2 men and 1 woman, were tape-stripped 10 consecutive times followed by topical treatment with 5-aminolevulinic acid (20%, w/w) for 4 hours under occlusion (Tegaderm(R)). Then the areas were irradiated for 30 minutes with Waldman PDT 1200 lamp (570-650 nm) with a total dose of 70 J/cm(2). Full-thickness punch biopsies were taken immediately after irradiation, and at 3 and 24 hours for electron microscopy examination. Photodynamic therapy caused morphological alterations mainly in the epidermis. Keratinocytes became oedematous and tonofilament bundles were split, but desmosomes remained normal. Many keratinocytes contained large intracellular vacuoles and extremely electronlucent cytoplasm implying cell damage. Although the majority of Langerhans cells were unaffected isolated Langerhans cells became apoptotic at 3 hours. The melanocytes preserved their normal morphology. The epidermal alterations recovered 24 hours after the irradiation. Inflammatory cell infiltrates were evident at 3 and 24 hours but no other dermal changes were observed. In conclusion, photodynamic therapy with 5-aminolevulinic acid affects mainly keratinocytes and can trigger apoptosis in Langerhans cells while melanocytes appear refractory, at least morphologically, to photodynamic therapy. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/280477
- author
- Bartosik, Jacek LU ; Stender, IM ; Kobayasi, T and Agren, MS
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- keratinocytes, melanocytes, 5-aminolevulinic acid, Langerhans cells, ultrastructure, apoptosis
- in
- EJD. European Journal of Dermatology
- volume
- 14
- issue
- 2
- pages
- 91 - 95
- publisher
- John Libbey Eurotext
- external identifiers
-
- wos:000221027700003
- scopus:1942440898
- ISSN
- 1167-1122
- language
- English
- LU publication?
- yes
- id
- d71ec3d2-96d9-4bca-9ad6-dbac4529d230 (old id 280477)
- alternative location
- http://www.jle.com/fr/revues/medecine/ejd/e-docs/00/04/00/6B/article.md?type=text.html
- date added to LUP
- 2016-04-01 15:52:12
- date last changed
- 2022-01-28 07:38:48
@article{d71ec3d2-96d9-4bca-9ad6-dbac4529d230,
abstract = {{The effect of photodynamic therapy on tape-stripped normal human skin was explored ultrastructurally. Back skin areas of 3 healthy Caucasian volunteers, 2 men and 1 woman, were tape-stripped 10 consecutive times followed by topical treatment with 5-aminolevulinic acid (20%, w/w) for 4 hours under occlusion (Tegaderm(R)). Then the areas were irradiated for 30 minutes with Waldman PDT 1200 lamp (570-650 nm) with a total dose of 70 J/cm(2). Full-thickness punch biopsies were taken immediately after irradiation, and at 3 and 24 hours for electron microscopy examination. Photodynamic therapy caused morphological alterations mainly in the epidermis. Keratinocytes became oedematous and tonofilament bundles were split, but desmosomes remained normal. Many keratinocytes contained large intracellular vacuoles and extremely electronlucent cytoplasm implying cell damage. Although the majority of Langerhans cells were unaffected isolated Langerhans cells became apoptotic at 3 hours. The melanocytes preserved their normal morphology. The epidermal alterations recovered 24 hours after the irradiation. Inflammatory cell infiltrates were evident at 3 and 24 hours but no other dermal changes were observed. In conclusion, photodynamic therapy with 5-aminolevulinic acid affects mainly keratinocytes and can trigger apoptosis in Langerhans cells while melanocytes appear refractory, at least morphologically, to photodynamic therapy.}},
author = {{Bartosik, Jacek and Stender, IM and Kobayasi, T and Agren, MS}},
issn = {{1167-1122}},
keywords = {{keratinocytes; melanocytes; 5-aminolevulinic acid; Langerhans cells; ultrastructure; apoptosis}},
language = {{eng}},
number = {{2}},
pages = {{91--95}},
publisher = {{John Libbey Eurotext}},
series = {{EJD. European Journal of Dermatology}},
title = {{Ultrastructural alteration of tape-stripped normal human skin after photodynamic therapy}},
url = {{http://www.jle.com/fr/revues/medecine/ejd/e-docs/00/04/00/6B/article.md?type=text.html}},
volume = {{14}},
year = {{2004}},
}