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Similar UV response...
Similar UV responses are seen in a skin organ culture as in human skin in vivo
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- Bäckvall, Helena (author)
- Uppsala universitet,Institutionen för genetik och patologi
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- Wassberg, Cecilia (author)
- Uppsala universitet,Dermatologi och venereologi
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- Berne, Berit (author)
- Uppsala universitet,Dermatologi och venereologi
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- Pontén, Fredrik (author)
- Uppsala universitet,Institutionen för genetik och patologi
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(creator_code:org_t)
- 2002-08-20
- 2002
- English.
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In: Experimental dermatology. - : Wiley. - 0906-6705 .- 1600-0625. ; 11:4, s. 349-356
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Ultraviolet radiation (UVR) plays an important role in the development of non-melanoma skin cancer. Most tumors develop in chronically sun-exposed skin, most often in cosmetically sensitive locations, where in vivo experiments may be difficult to perform. In this study, we describe a skin organ culture model with preserved normal morphology and intact response to UVR. Skin explants from chronically sun-exposed and non-sun-exposed skin were irradiated with artificial UVA+UVB with and without topical sunscreen. UV-induced DNA damage, epidermal p53 response and repair kinetics were analyzed using immunohistochemistry. Four hours after UV-irradiation epidermal keratinocytes showed a strong immunoreactivity for thymine-dimers. Gradual repair during an incubation time resulted in few residual thymine-dimers after 48 h. Repair appeared to be more efficient in chronically sun-exposed skin compared with non-sun-exposed skin. There was also an accumulation of p53 protein in epidermal keratinocytes, peaking at 4-24 h after irradiation. Large interindividual differences with respect to formation and repair of thymine-dimers as well as induction and duration of the p53 response were observed. Skin explants treated with topical sunscreen prior to UV-irradiation showed a clear reduction of thymine-dimers and p53 expression. The epidermal UV-responses and repair kinetics in organ-cultured skin were similar to what was found in vivo. Our data suggest that organ-cultured skin provides a valuable tool for studies of UV-induced epidermal responses in chronically sun-exposed skin.
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- ref (subject category)
- art (subject category)
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