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Ultraviolet irradiation induces thrombospondin-1 which attenuates type I procollagen downregulation in human dermal fibroblasts

Cited 12 time in Web of Science Cited 15 time in Scopus
Authors
Seo, Jo-Eun; Kim, Sangmin; Shin, Mi Hee; Kim, Mi-Sun; Park, Chi-Hyun; Chung, Jin Ho; Eun, Hee Chul
Issue Date
2010-07
Publisher
ELSEVIER IRELAND LTD
Citation
JOURNAL OF DERMATOLOGICAL SCIENCE; Vol.59(1); 16-24
Keywords
UV irradiationFibroblastsTSP-1ProcollagenDermis
Abstract
Background: Thrombospondin-1 (TSP-1) is a matricellular glycoprotein and recognized as an inhibitor of angiogenesis and an activator of transforming growth factor-beta (TGF-beta). Although TSP-1 expression has been shown to be regulated by various stimuli including UV in some types of cell, more work need to be done to understand the regulation of TSP-1 expression and its functional significances in many other types of cell. Objective: In this study, we investigated the effect of UV on TSP-1 expression in human skin dermis and dermal fibroblasts and the role of TSP-1 on the type I procollagen expression after UV exposure. Methods: Human buttock skin and human dermal fibroblasts were irradiated with UV. The mRNA and the protein levels of TSP-1 or type I procollagen were measured by real-time polymerase chain reaction and Western blotting, respectively. Results: We found that UV irradiation increased TSP-1 expression at the mRNA and protein levels in human skin dermis and dermal fibroblasts. UV-induced TSP-1 expression was greatly suppressed by inhibition of the PI3K, Akt, or mTOR pathways. The inhibition of TSP-1 activity by a blocking peptide or suppression of TSP-1 expression by specific TSP-1 small interfering RNA augmented the UV-induced decrease of type I procollagen expression. Conclusion: Our results suggest that UV-induced TSP-1 plays an important role on alleviating and/or recovering the type I procollagen expression downregulated by UV in human dermal fibroblasts.
ISSN
0923-1811
Language
English
URI
http://hdl.handle.net/10371/78340
DOI
https://doi.org/10.1016/j.jdermsci.2010.04.010
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College of Medicine/School of Medicine (의과대학/대학원)Dermatology (피부과학전공)Journal Papers (저널논문_피부과학전공)
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