Effects of Zizyphus lotus L. (Desf.) polyphenols on Jurkat cell signaling and proliferation.

Abstract:

: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.

journal_name

Int Immunopharmacol

authors

Abdoul-Azize S,Bendahmane M,Hichami A,Dramane G,Simonin AM,Benammar C,Sadou H,Akpona S,El Boustani ES,Khan NA

doi

10.1016/j.intimp.2012.11.013

subject

Has Abstract

pub_date

2013-02-01 00:00:00

pages

364-71

issue

2

eissn

1567-5769

issn

1878-1705

pii

S1567-5769(12)00356-6

journal_volume

15

pub_type

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