Indeed, this is supported by our finding that fulvestrant treatment enhanced the ability of HRGβ1 to stimulate signalling via ErbB3 and ErbB4, resulting in this ligand's potently overriding the suppression of cyclin D1 protein expression and the blockade of growth by fulvestrant in all four cell lines.
In another physiologically relevant system, we show that the strength of peptide stimulation, high frequency of responder CD8+ T cells or presence of high IL-2 can override the suppression of HIV-specific CD8+ T cells by Tregs.
BAK1-HA is not fully functional in BR signaling and exerts a dominant-negative effect on the endogenous BAK1, which may explain that introduction of the BAK1-HA transgene can override the suppression of immunity triggered by overexpression of BRI1 (Belkhadir et al., 2012); BAK1-HA does not exert such a dominant negative effect, however, on PTI signaling.
The fact that slow oscillations were contained within bursts suggests that burst suppression may be due to prolonged epochs of suppression overriding the ongoing cortical state.
In addition, based on the comparison between the effects on DNA damage and on overriding the GAr-dependent transuppressionpression, these results further demonstrate that these two effects are uncoupled.
Recent data support the notion that canonical signaling favours tumor suppression, while non-canonical signaling tips the balance, such that TGFβ switches to become a promoter of tumor growth, invasion and metastasis, overriding the tumor-suppressing activities transmitted via Smad2/3.
Indeed, addition of IL-2 to in vitro activation cultures overrides Treg-mediated suppression of target T cells during both SEB and allogeneic stimulation.
In summary, our results indicate that the strength of TCR signals and IL-2 can override Treg-mediated suppression when Treg numbers and activation are limiting.
Parasystole refers to the parallel activation of two of more pacemaker regions, which may override their usual suppression through protection by a region of conduction block.
Thus, pRB, a key member of the cell cycle checkpoint network, seems to play a major role by inducing growth arrest under moderate hypoxia, and it gradually overrides hypoxia-induced suppression of pyrimidine metabolism in the regulation of progression through S-phase under such conditions.
