期刊
JOURNAL OF INVESTIGATIVE DERMATOLOGY
卷 133, 期 11, 页码 2601-2608出版社
ELSEVIER SCIENCE INC
DOI: 10.1038/jid.2013.203
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资金
- Korea Ministry of the Environment [412-111-001]
- National Research Foundation of Korea (NRF)
- Ministry of Education, Science, and Technology [2012R1A1A2044085]
- Korea Environmental Industry & Technology Institute (KEITI) [412-111-001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2012R1A1A2044085] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Thymic stromal lymphopoietin (TSLP) may have a key role in the initiation and maintenance of allergic inflammatory diseases, including atopic dermatitis. The present study revealed that UVB radiation exposure could induce TSLP expression in human keratinocytes and a human skin equivalent model. In addition, we investigated the regulatory mechanism of UVB-induced TSLP expression in keratinocytes. TSLP expression was upregulated by transfection with pcDNA3-hypoxia-inducible factor (HIF)-1 alpha (P402A and P564A), which stably expresses HIF-1 alpha protein. UVB-induced TSLP induction in keratinocytes was suppressed in the treatment of mitogen-activated protein kinase inhibitors or small interfering RNAs against HIF-1 alpha. The results of chromatin immunoprecipitation assays indicate the direct involvement of HIF-1 alpha in UVB-mediated TSLP induction. Taken together, these findings indicate that UVB exposure may increase TSLP expression through a HIF-1 alpha-dependent mechanism via the c-JUN N-terminal kinase and extracellular signal-regulated kinase pathways in human keratinocytes. Our data showed that UVB-induced TSLP might increase secretion of the T-helper type 2-attracting chemokine (c-c motif) ligand 17 by human dendritic cells. The present study suggests an important role of HIF-1 alpha in UVB-mediated immune response in keratinocytes.
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