Interleukin-15 expression by human endothelial cells: up-regulation by ultraviolet B and psoralen plus ultraviolet A treatment
- 1 February 1996
- journal article
- Published by Wiley in Photodermatology, Photoimmunology & Photomedicine
- Vol. 12 (1) , 17-21
- https://doi.org/10.1111/j.1600-0781.1996.tb00238.x
Abstract
The purposes of the present study were to determine whether endothelial cells express IL-15 and to evaluate effects of ultraviolet B (UVB) and 8-methoxypsoralens plus UVA (PUVA) on such expression. Cultured human endothelial cells derived from dermis or umbilical veins were subjected to reverse transcriptase-polymerase chain reaction (RT-PCR) and immunoblot analyses for the detection of IL-15 mRNA and protein, respectively. Both dermal and umbilical vein endothelial cells were shown to express IL-15 mRNA and protein, and these markers were upregulated following UVB or PUVA treatment (but not by UVA or 8-methoxypsoralens alone). Also using RT-PCR, dermal and umbilical vein endothelial cells were shown to express IL-2R gamma c mRNA. These results expand the sources of IL-15 in skin to include keratinocytes, dermal fibroblasts, and now endothelial cells. That IL-15 from all three skin cells can be upregulated by UV treatment suggests a role for this cytokine in photosensitive disorders. Finally, the possibility of an autocrine effect of IL-15 on endothelial cells is raised by the expression of IL-2R gamma c in these cells.Keywords
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