Exosomes inhibit the nuclear translocation of NFAT and NFκB following activation. Exosomes inhibit the nuclear translocation of NFAT and NFκB following.

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Presentation transcript:

Exosomes inhibit the nuclear translocation of NFAT and NFκB following activation. Exosomes inhibit the nuclear translocation of NFAT and NFκB following activation. A–D, NDPBLs from HLA-A2–positive donors were incubated with dextramers loaded with EBV (A and B) or CMV (C and D) peptides in the presence or absence of ascites fluid–derived exosomes. The activation was monitored by determining NFAT translocation to the nucleus using an Amnis ImageStream Cytometer. The intrapatient heterogeneity in exosome-induced inhibition of the dextramer-induced NFAT activation in EBV and CMV-specific T cells is represented in A and C. Each data point represents an individual cell. The horizontal bars represent the mean ± SD of all the CD8+/dextramer+ cells detected. Mean ± SDs of a triplicate assessment in three different EBV-positive individuals are shown in B and three different CMV- positive individuals are shown in D. Note that NFAT translocation does not occur with cells on ice. E and F, NDPBLs were either left unactivated (UN), or activated for 2 hours with immobilized antibodies to CD3 and CD28 in the absence (Act) or presence (Act + Exo) of exosomes derived from ovarian tumor ascites fluid. The translocation of the transcription factors NFAT (E) or NFκB (F) into the nucleus of CD3+ T cells was monitored using fluorescence microscopy. *, P < 0.05; **, P < 0.01; ***, P < 0.001. Gautam N. Shenoy et al. Cancer Immunol Res 2018;6:236-247 ©2018 by American Association for Cancer Research