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J Radiat Prot Res > Volume 40(3);2015 > Article
Journal of Radiation Protection and Research 2015;40(3):187. doi: https://doi.org/10.14407/jrp.2015.40.3.187
CHANGING OF RGS TRANSCRIPTS LEVELS BY LOW-DOSE-RATE IONIZING RADIATION IN MOUSE TESTIS
Kim, Tae-Hwan;Baik, Ji Sue;Heo, Kyu;Kim, Joong Sun;Lee, Ki Ja;Rhee, Man Hee;Kim, Sung Dae;
ABSTRACT
Deleterious effects of high dose radiation exposure with high-dose-rate are unarguable, but they are still controversial in low-dose-rate. The regulator of G-protein signaling (RGS) is a negative regulator of G protein-coupled receptor (GPCR) signaling. In addition, it is reported that irradiation stress led to GPCR-mediated mitogen-activated protein kinase (MAPK) and phosphotidylinositol 3-kinase (PI3-k) signaling. The RGS mRNA expression profiles by whole body radiation with low-dose-rate has not yet been explored. In the present study, we, therefore, examined which RGS was modulated by the whole body radiation with low-dose-rate ($3.49mGy{cdot}h^{-1}$). Among 16 RGS expression tested, RGS6, RGS13 and RGS16 mRNA were down-regulated by low-dose-rate irradiation. This is the first report that whole body radiation with low-dose-rate can modulate the different RGS expression levels. These results are expected to reveal the potential target and/or the biomarker proteins associated with male testis toxicity induced by low-dose-rate irradiation, which might contribute to understanding the mechanism beyond the testis toxicity.
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