Furthermore, lack of directional cell body movements or polarization towards adjacent T cells also affected the number of DC∶T cell interactions which were barely detectable in the presence of PLCγ2−/− DCs (Figure 5C).
Even in the circumstance that some PLCγ2−/− DCs could reach the secondary lymphoid organs, the in vitro imaging data suggest that lack of PLCγ2 affects DC ability to extend ruffles and long dendrites towards the adjacent T cells.
In addition, activated B cells can synthesize cytokines and membrane-associated molecules that provide nonspecific help to adjacent T cells.
Stimulatory, costimulatory, and/or inhibitory signals may be provided by adjacent T cells present in the inflammatory infiltrate.
The substrate is converted into the insoluble product, forming spots of color representing areas of captured cytokines that are secreted by adjacent T cells.
The architecture of the system brings select immune cells together in discrete space and time and the interactions between the now adjacent T cells create the integrated dynamic response of the system.
It has recently been shown that Treg cells can act as an IL-2 'sponge', competitively depriving adjacent T-cells of autocrine IL-2, and thus preventing the IL-2-dependent processes of T-cell activation and proliferation (de la Rosa et al., 2004; Scheffold et al., 2005).
Of the 21 mutations occurred within or adjacent to T-cell antigenic regions, 66.7% involved clusters of CTL and Th epitopes.
A Mann-Whitney U-test was performed to determine whether the distributions of adjacent CD8+ T-cell numbers per myofiber in groups 1 and 4 differed significantly in all analyzed patients.
Our model suggests that cell-free virus plays an important role in episode prolongation: cell-free viruses seed adjacent regions where T-cell density may be lower, leading to the formation of secondary foci of viral replication, which allows wide spread of virus across the genital tract.
