Involvement of nuclear factor of activated T cells activation in UV response - Evidence from cell culture and transgenic mice

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Huang CS, Mattjus P, Ma WY, Rincon M, Chen NY, Brown RE, Dong ZG
Publication year: 2000
Journal: Journal of Biological Chemistry
Journal acronym: J BIOL CHEM
Volume number: 275
Issue number: 13
Start page: 9143
End page: 9149
Number of pages: 7
ISSN: 0021-9258
eISSN: 1083-351X


Abstract

Mammalian cells respond to UV radiation by signaling cascades leading to activation of transcription factors, such as activated protein 1, NF kappa B, and p53, a process known as the "UV response." Nuclear factor of activated T cells (NFAT) was first identified as an inducible nuclear factor in immune response and subsequently found to be expressed in other tissues and cells. To date, however, the regulation and function of NFAT in tissues and cells, other than the immune system, are not well understood. In this study, we demonstrate that UV radiation activates NEAT-dependent transcription through a calcium-dependent mechanism in mouse epidermal JB6 cell lines, as well as in the skin of NFAT-luciferase reporter transgenic mice. Exposure of JB6 cells to UV radiation leads to the transactivation of NEAT in a dose-dependent manner. A23187 had a synergistic effect with UV for NFAT induction, whereas pretreatment of cells with nifedipine, a calcium channel blocker, dramatically impaired the NFAT activity induced by either UV or UV plus A23187, Calcium-dependent activation of NEAT by UV was further confirmed by an in vivo study using NFAT-luciferase reporter transgenic mice. These results demonstrated that UV radiation is a strong activator for skin NFAT transactivation through calcium-dependent pathways, suggesting that NEAT activation may be a part of the UV response.

Last updated on 2019-23-09 at 05:32