Figure 4.
NK cells induce a Ca2+ flux in iDCs followed by translocation of microtubule organizing center and IL-18 at the immunologic synapse. (A) NK cells were added to Fura2-AM-loaded iDCs and Ca2+ waves were monitored. Results are expressed as [Ca2+]i and represent the mean of calcium response of 15 different cells. (B) iDCs or iDC/NK conjugates after 3 hours of culture were stained for tubulin (green) or IL-18 (red). Nuclei are stained in blue by DAPI. Arrows point to the clustering of tubulin and IL-18 at the contact site between NK cells and iDCs.