This is the case in a checkpoint-defective context in which, on top of the inability to detach the genome association with the nuclear envelope, the unscheduled firing of dormant origins increases the number of forks that might undergo reversal.
In summary, we demonstrated here that integration-free iPSCs can be efficiently and consistently obtained from non-invasively acquired human EMCs and UCs, even in a defective disease context (i.e. type II DM) (Fig. 1L).
The consequent accumulation of positive supercoiling at transcribed genes might therefore provide the energy source to promote reversal of incoming forks, particularly in a checkpoint-defective genetic context that exhibits an altered replisome-fork association (Cobb et al., 2003; Lucca et al., 2004; Postow et al., 2001b).
In this context, defective secondary septae formation can be corrected by retinoic acid administration.
Co-expression of RIP-1 in the RFS-1/RAD-51 yeastwo-hybridid strains impaired the RFS-1/RAD-51 interaction, suggesting RAD-51 and RIP-1 compete for a common binding surface on RAD-51 in the absence of DNA, but this inhibition was defective in the context of the RFS-1 Walker box mutations.
As pointed out by Romick-Rosendale and co-workers in a recent review [11], the frequent emergence of SCC in FA must be seen in the context of defective DNA repair compromising genomic integrity.
Within a genetic context of defective apoptotic pathways they may provide proliferative advantage by selective gene expression, whereas in cancer cells with intact apoptotic cell-death pathways their overexpression would drive tumor reduction.
Upregulation of the other proteolytic systems is sufficient to maintain proteostasis in a context of defective CMA under basal conditions, but not in the face of different stressors that would typically drive CMA activity such as proteotoxic, lipotoxic, or hepatotoxic agents in vivo.
Or, as O'Brien himself puts it in a very different context: "Like a defective purgatory no one remembers the point of, or how to turn it off.
Thus, in the context of a defective MMR environment, PPARδ agonism is unlikely to be pro tumourigenic.
Hepatopulmonary syndrome (HPS) is the development of pulmonary dysfunction characterized by defective arterial oxygenation in the context of liver disease.
