The Third Avenue bridge, which connects the South Bronx and East Harlem, is often the site of police checkpoints specifically set up to stop motorcycles, including street legal vehicles.
Myc oncoprotein attenuates the spindle assembly checkpoint (SAC) specifically activated by microtubules inhibitors and induces polyploid cells [28].
As results of efficacy, tolerability, and durability of responses with immune checkpoint inhibitors (specifically with PD-1) emerge, efforts to guide patient selection are also underway.
We believe that the clinical case reports of abscopal effects, and the preclinical models summarized above provide a strong rationale for testing the combination of radiotherapy with immune checkpoint inhibitors, specifically PD-1/PD-L1 inhibition, in clinical trials for humans.
In elegant further experiments, the authors demonstrated the requirement for CDK5 in the DNA damage checkpoint activation and, specifically, the intra-S and G2M checkpoints in non-neuronal cells.
It's a short drive east of Jerusalem, and I've had to cross an Israeli checkpoint, but it's specifically for settler use – a nod, the "right" appearance and Israeli number plates get me waved through.
The Ataxia Telangiectasia Mutated (ATM) kinase is an essential checkpoint protein that is specifically activated by DNA DSBs and not by SSBs, even at numbers that relax chromatin supercoiling [12].
While this study was conducted within the context of checkpoint adaptation, a term specifically referring to cell recovery despite presence of DNA damage, from replication checkpoint, this role of Plk1 in checkpoint deactivation through Claspin regulation may also account for DNA damage checkpoint recovery.
One possibility is that DSB formation in cdc6-mn cells triggers the activation of the recombination checkpoint, in which Mec1 specifically activates the Mek1 kinase and not Rad53 (Usui et al., 2001; Cartagena-Lirola et al., 2008) to direct DSB repair activity to the homologous chromosomes (Carballo et al., 2008; Niu et al., 2009).
