1. Rab11-FIP3 silencing impairs T cell activation events.
Rab11-FIP3 silencing impairs T cell activation events. (A–C) Jurkat T cells transfected with control or FIP3.1 siRNA oligonucleotides were activated with anti-CD3 (UCHT1) for the indicated time. (A) Phosphorylation of TCRζ, ZAP70, and LAT was analyzed by Western blot with the depicted specific anti-phosphotyrosine Abs. (B) Graphs represent the percentage of each band intensity with respect to that of nonstimulated cells (t = 0) transfected with control siRNA. The intensity of each band from Western blots shown in (A) was normalized with respect to the intensity of β-tubulin for each time point. (C) Intracellular calcium concentration was measured by loading Jurkat cells with FLUO-3 AM calcium indicator. Intracellular calcium concentration was measured by flow cytometry. (D) Jurkat (left panel) or peripheral blood CD4 T cells (right panel) were transfected as in (A)–(C). Cells were activated with anti-CD3 + anti-CD28 Abs. IL2 mRNA levels were assessed by RT-qPCR and normalized to the B2M (Jurkat) or RPL13A (primary T cells) housekeeping genes mRNA. Data are the mean of n = 3 RT-qPCRs representative of three independent biological experiments (four different donors for primary T cells). Mean ± SD. Mann–Whitney U test. ****p < , ***p < 0.001, **p < 0.01, *p < 0.05.
Jérôme Bouchet et al. J Immunol 2017;198:
Copyright © 2017 by The American Association of Immunologists, Inc.