Steady-state mRNA levels of interleukin-1, integrins, cJun, and cFos in hairless mouse skin during short-term chronic UV exposure and the effect of topical tretinoin
| Autor: | Elaine Schwartz, Lorraine H. Kligman, S. Yang |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Integrins
Transcription Genetic Proto-Oncogene Proteins c-jun Ultraviolet Rays Administration Topical medicine.medical_treatment Photoaging Immunology Integrin Tretinoin Dermatology Biology Polymerase Chain Reaction Mice Keratolytic Agents medicine Animals Immunology and Allergy Radiology Nuclear Medicine and imaging Collagenases RNA Messenger In Situ Hybridization Skin Mice Hairless Interleukin General Medicine medicine.disease Molecular biology Hairless Cytokine Biochemistry Collagenase biology.protein Female Tumor necrosis factor alpha Collagen Proto-Oncogene Proteins c-fos Interleukin-1 medicine.drug |
| Zdroj: | Photodermatology, Photoimmunology & Photomedicine. 15:198-204 |
| ISSN: | 1600-0781 0905-4383 |
| DOI: | 10.1111/j.1600-0781.1999.tb00085.x |
| Popis: | We have proposed that UV activation of cytokine and integrin signaling pathways may initiate the photoaging process and that one of the effects of tretinoin treatment may be to alter the cytokine and integrin patterns. In previous results, steady-state mRNA levels of interleukin-1alpha, tumor necrosis factor alpha, transforming growth factor beta, collagenase, stromelysin, collagen, and integrins (alpha1 and alpha2) were increased in the skin of hairless mice that were either UV treated or concurrently treated with UV followed by topical tretinoin for 5 weeks. The aim of this study was to focus on the expression of alpha1, alpha2 and alpha5 integrins, IL-1alpha, IL-1beta, cJun, and cFos at an earlier time point (3 weeks). Animals were UV irradiated thrice weekly for 3 weeks and were treated topically with either 0.05% tretinoin or the vehicle immediately after each exposure. Total RNA was prepared and used in RT-PCR with radiolabeled dCTP and specific primers. UV slightly increased steady-state mRNA levels for alpha1, alpha2 and alpha5 integrins whereas UV + tretinoin increased their expression (3-, 2- and 7-fold respectively). Steady-state mRNA levels for IL-1alpha, IL-1beta and cJun were increased with UV (3-, 12- and 6-fold respectively) and with UV + tretinoin (6-, 7- and 9-fold respectively). In contrast, cFos expression was unchanged. In situ staining for IL-1alpha mRNA was slightly more abundant in mice treated for 3 weeks with UV and UV + tretinoin than in controls whereas 5 weeks of UV + tretinoin treatment gave strongly positive staining. Results are consistent with cytokines and integrins mediating the effects of UV on the skin, with modulation of these effects by tretinoin. |
| Databáze: | OpenAIRE |
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