By Anderson T. Wang, Peter J. McHugh (auth.), Lawrence Panasci, Raquel Aloyz, Moulay Alaoui-Jamali (eds.)
A accomplished evaluation of the hot advancements in DNA fix learn that experience strength for translational functions. The e-book explains intimately some of the organic mechanisms wherein melanoma cells can steer clear of anticancer treatment and bounds its usefulness in sufferers. additionally they evaluation the influence of such novel inhibitors of DNA fix mechanisms as methylguanine-DNA-methyltransferase. additionally tested are inhibitors of different DNA fix enzymes similar to PARP and DNA-PK. The publication captures-for either melanoma researchers and oncologists facing hallmark "relapse" or "drug resistance" phenomena on a regular basis-the many intriguing new makes use of of DNA fix inhibitors, both by myself or together with anticancer therapies.
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Additional resources for Advances in DNA Repair in Cancer Therapy
However, since activation of PI3KK could occur in the absence of DSBs under certain circumstances [40–43], γ-H2AX labeling does not account solely for DSB occurrence. For instance, DNA-PK is activated in hypoxic cells independently of DNA breaks by a new mechanism relying on chromatin modifications . 28 4 B. Salles et al. The Non Homologous End-Joining Pathway In mammalian cells, NHEJ is the predominant repair pathway for DSB repair which, throughout the cell cycle, ligates the two DNA ends together with minimal end processing [45, 46].
When bound to DNA-ends, Ku recruits the DNA-PKcs, which by itself has a weak protein kinase activity, strongly stimulated through the Ku interaction [102, 103]. DNA-PK, a Pharmacological Target in Cancer Chemotherapy and Radiotherapy? 31 The phosphorylation occurs on an S/T-Q motif, although some serine/threonine in other sequences/targets could be phosphorylated [59, 104]. The phosphorylation of Artemis may help to activate its endonuclease activity [60, 105]. However, although DNA-PK also phosphorylates Ku, XRCC4, and Cer-XLF in the cell, mutational studies concluded that these phosphorylations are not functionally important, at least for NHEJ .
Proc Natl Acad Sci U S A 105(2):405–406 65. McVey M, Lee SE (2008) MMEJ repair of double-strand breaks (director’s cut): deleted sequences and alternative endings. Trends Genet 24(11):529–538 66. Maser RS, Wong KK, Sahin E et al (2007) DNA-dependent protein kinase catalytic subunit is not required for dysfunctional telomere fusion and checkpoint response in the telomerasedeficient mouse. Mol Cell Biol 27(6):2253–2265 67. Bombarde O, Boby C, Gomez D et al (2010) TRF2/RAP1 and DNA-PK mediate a double protection against joining at telomeric ends.