E-GEOD-30629 - Gene expression profile of isolated splenic NK cells from mice treated with ptaquiloside and/or selenium
Released on 24 July 2013, last updated on 2 June 2014
To better understand the immunosuppressor mechanism of ptaquiloside in splenic NK cells and the reversion of this effect by selenium, we have employed whole genome microarray expression profile to identify genes associated with immunosuppression. Among 89 genes induced by ptaquiloside treatment in splenic NK cells only two genes (Mt1 and Mt2) were identified as related with its immunosuppressor effect. Moreover this augmented expression of Mt1 and Mt2 was totally abrogated by selenium co-treatment. These results were confirmed by flow cytometry in splenic cells harvested from other six mice and treated in vitro for 1 hour with ptaquiloside and/or selenium. Twenty mice were separated randomly into four groups as Control (water), Pt (ptaquiloside 5.3 mg/kg), PtSe (ptaquiloside 5.3 mg/kg and selenium 1.3 mg/kg) and Se (selenium 1.3 mg/kg) and were treated daily by gavage for 14 days. After treatment, untouched NK cells were isolated using the NK cell isolation kit, LS columns, and QuadroMACS cell separator system (Miltenyi Biotec, Inc.) to perform RNA isolation and whole-genome gene expression profile. Thereby, five independent experiments were performed per group using different donors for each experiment. To confirm the increase of metallothionein protein induced by ptaquiloside, splenic cells were harvested from other six mice and treated in vitro for 1 hour with ptaquiloside [4.4 µg/mL] and/or selenium [0.1 mM] and analyzed by flow cytometry.
transcription profiling by array
Ptaquiloside reduces NK cell activities by enhancing metallothionein expression, which is prevented by selenium. Latorre AO, Caniceiro BD, Fukumasu H, Gardner DR, Lopes FM, Wysochi HL Jr, da Silva TC, Haraguchi M, Bressan FF, Gï¿½rniak SL. , Europe PMC 23274088