6533b82bfe1ef96bd128d892
RESEARCH PRODUCT
Effects of Zizyphus lotus L. (Desf.) polyphenols on Jurkat cell signaling and proliferation.
Malika BendahmaneAnne-marie SimoninNaim Akhtar KhanSouleymane Abdoul-azizeEs-saddik El BoustaniSimon AkponaHassimi SadouAziz HichamiGado DramaneChahid Benammarsubject
Cell signalingIntracellular pHT-LymphocytesImmunologychemistry.chemical_elementCalciumBiologyJurkat cellsJurkat CellsExtracellularImmunology and AllergyHumansCalcium SignalingRNA MessengerExtracellular Signal-Regulated MAP KinasesCell ProliferationPharmacologyImmunosuppression TherapyInflammationKinasePolyphenolsZiziphusCell cycleCell biologyBiochemistrychemistryGene Expression RegulationFruitPhosphorylationInterleukin-2Thapsigargindescription
We assessed the effects of Zizyphus lotus L. (Desf.) polyphenols (ZLP) on T-cell signaling and proliferation. Our results showed that ZLP exerted no effect on the increases in intracellular free calcium concentrations, [Ca(2+)]i, in human Jurkat T-cells. However, ZLP modulated the thapsigargin-induced increases in [Ca(2+)]i in these cells. ZLP treatment was found to decrease the phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2). In addition, ZLP induced a rapid (t1/2=33s) and dose-dependent decrease in intracellular pH (pHi) in human Jurkat T-cells. Furthermore, ZLP significantly curtailed T-cell proliferation by diminishing their progression from S to G2/M phase of cell cycle, and the expression of interleukin-2 (IL-2) mRNA. Taken together, the results of the present study demonstrate that ZLP modulate cell signaling and exert immunosuppressive effects in human T-cells.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-02-01 | International immunopharmacology |