Such repressive sequence could function by recruiting specific repressing factors [36], but the exact mechanism accounting for this repressive function of this sequence even in the absence of methylation would require further investigation.
This suggests that genes within a distinct pathway have a specific epigenetic signature that allows them to be recognized by particular activating and/or repressing factors.
During involution, signaling by liganded GR is lost, and signaling by unliganded GR would be re-established, thus upregulating pro-apoptotic factors to encourage involution, and repressing factors involved in differentiation.
We therefore modeled IL-2 production as an all-or-none response to signaling input, with Ag-TCR and pSTAT5 acting as activating and repressing factors (Long and Adler, 2006; Villarino et al., 2007), respectively ('Equations'Equations
Some studies have shown that miR-125b represses factors in the p53 network, including apoptosis regulators like PUMA, insulin-like growth factor-binding protein 3 (IGFBP3), and BCL2-antagonist/killer 1 (Band) and cell-cycle regulators like cyclin C, CDC25C, and cyclin-dependent kinase inhibitor 2C (CDKN2C) [ 131].
Taken together, these molecular insights provide evidence, that in addition to a core set of hyphally regulated genes, also species-specific sets of hyphally induced or repressed factors exist for C. albicans and C. dubliniensis, indicating that hyphae in both species are equipped in a different manner to adapt specifically to the respective environments.
Specifically, in adults with IBS-D, by downregulating nuclear factor-ĸβ-repressing factor and claudin-1 mRNA expression, microRNA 29 increases intestinal barrier permeability [37].
However, during hESC differentiation towards hCM, the levels of H3K27me3 were decreased in hCM specific TFs, highlighting this mark as a major repressing factor in non-cardiac cell types (Paige et al., 2012; Xie et al., 2013).
But our finding that E. aerogenes S012 survived (but did not grow) in a growth medium containing over 60 g/l ethanol suggests that ethanol product inhibition may not be the repressing factor to further metabolism of glycerol beyond 48 h.
