CHK1 inhibition
Chk1 inhibition significantly potentiates activity of nucleoside analogs in TP53-mutated B-lymphoid cells
... analyzed Chk1 inhibition effects in wt- p53 and mut-p53 cell lines, and besides CYT and GEM representing well-established NAs suitable for synergistic Chk1 inhibition, we analyzed the effect ...
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CHK1 Inhibition Radiosensitizes Head and Neck Cancers to Paclitaxel-Based Chemoradiotherapy.
... a CHK1 inhibitor (CCT244747) as a radiosensitiser and investigated whether a mechanistically rational triple combination of radiation/paclitaxel/CHK1 inhibitor delivered according to an optimised schedule ...
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Chk’ing p53 deficient breast cancers
... nonspecific Chk1 inhibitor UCN-01 in a variety of human cancers have been somewhat disappointing ...of Chk1 (AZD7762), Ma et ...reintroduced Chk1 as a bona fide target for the treatment of ...
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CHK1 targets spleen tyrosine kinase (L) for proteolysis in hepatocellular carcinoma
... Conversely, CHK1 has been found to be overexpressed in various tumors com- pared with the adjacent normal tissues (35–37), and expression of CHK1 protein has been shown to positively correlate with tumor ...
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In vitro and in vivo single-agent efficacy of checkpoint kinase inhibition in acute lymphoblastic leukemia
... by Chk1 inhibition, the differentially expressed genes were analyzed in terms of biological func- tion using the MetaCore pathway mapping software (Gen- eGo ...a Chk1’s mech- anism of action, the ...
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Unique functions of CHK1 and WEE1 underlie synergistic anti-tumor activity upon pharmacologic inhibition
... and CHK1 inhibitors required for inhibition of cell proliferation (compare Figures 2C and 5 in ...and CHK1 inhibition ...and CHK1 kinases during S- phase are responsible for the ...
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Combined inhibition of Chk1 and Wee1 as a new therapeutic strategy for mantle cell lymphoma
... both Chk1 and Wee1 in regulating cell cycle progression in the absence of exogenous DNA damage, by phosphorylating CDK1 and CDK2 and by controlling DNA replication, is also an active area of investigation [12, ...
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CHK1 regulates NF-κB signaling upon DNA damage in p53- deficient cells and associated tumor-derived microvesicles
... where CHK1 levels remain high (Figure 1A) To determine whether abrogation of CHK1 signaling is sufficient to activate the CS-pathway in WT p53 cells, two different methods were employed: depletion of ...
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Inhibition of CHK1 enhances cell death induced by the Bcl-2-selective inhibitor ABT-199 in acute myeloid leukemia cells
... Resistance to standard chemotherapy agents remains a major obstacle for improving treatment outcomes for acute myeloid leukemia (AML). The Bcl-2-selective inhibitor ABT-199 has demonstrated encouraging preclinical ...
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Characterization of a mantle cell lymphoma cell line resistant to the Chk1 inhibitor PF-00477736
... kinase Chk1 is a crucial player of the cell cycle checkpoints machinery, being activated after exogenous DNA damage, such as the damage caused by cytotoxic agents, and activating the S and G2 checkpoints, by ...
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Inhibition of Chk1 with the small molecule inhibitor V158411 induces DNA damage and cell death in an unperturbed S-phase
... ATR inhibition results in the generation of large amounts of ssDNA and exhaustion of the pool of ...[36]. Chk1 inhibition induced γH2AX in cells prior to depletion of the available pool of ...
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Multiparameter Lead Optimization to Give an Oral Checkpoint Kinase 1 (CHK1) Inhibitor Clinical Candidate: (R)-5-((4-((Morpholin-2-ylmethyl)amino)-5-(trifluoromethyl)pyridin-2-yl)amino)pyrazine-2-carbonitrile (CCT245737).
... of CHK1 inhibition, further progression has often been challenging and development of several agents has been halted after early phase clinical ...for CHK1, and were developed as intravenous ...the ...
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Differential Involvement of Histidine Kinase Receptors in Pseudohyphal Development, Stress Adaptation, and Drug Sensitivity of the Opportunistic Yeast Candida lusitaniae
... and CHK1, potentially encoding HKRs of classes VI, III, and X, ...nik1 chk1 triple mutant, which are not viable in ...and chk1 mutants exhibited a more moderate sensitivity to ...
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Interactions of Claspin with replication and checkpoint proteins
... phosphorylation Chk1 by ATR in a reconstituted kinase assay with purified proteins ...to Chk1 (Chk1-binding domain; CBD) and a novel Mrc1-like domain (MRC1) identified bioinformatically and shown to ...
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Antagonism of Chk1 Signaling in the G2 DNA Damage Checkpoint by Dominant Alleles of Cdr1
... Screening to identify the location of the D8 mutation: On the basis of the recessive lethal phenotype of the D8 strain, suppressed by the tRNA sup3-5, we designed a plasmid shuffle screen. For this we cloned an ...
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Ciclopirox activates ATR-Chk1 signaling pathway leading to Cdc25A protein degradation
... activating Chk1 in rhabdomyosarcoma (Rh30) and breast carcinoma (MDA-MB-231) ...that inhibition of Chk1 with TCS2312 or knockdown of Chk1 profoundly attenuated CPX- induced Cdc25A degradation ...
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Dissecting The Functions Of Atr In Replication Fork Stability
... ATR inhibition cause similar levels of fork collapse at overlapping genomic locations in a CDK1-depdendent manner under conditions of partial replication inhibition (low dose ...
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Analysis of Rad3 and Chk1 protein kinases defines different checkpoint responses
... to Chk1 phosphorylation, this response is dependent on the presence of the check- point Rad proteins, including ...or chk1 mutants show a clear mitotic arrest defect during incubation with hydroxyurea, a ...
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Dnmt1 dependent Chk1 pathway suppression is protective against neuron division
... from Chk1 pathway activation and subsequent cell division even after acute Rb family inactivation, we focused on the DNA methyltransferase Dnmt1, which blocks Chk1 pathway activation during the S phase ...
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A physical association between the human mutY homolog (hMYH) and DNA topoisomerase II-binding protein 1 (hTopBP1) regulates Chk1-induced cell cycle arrest in HEK293 cells
... HEK293 cells were harvested and lysed with a lysis buffer [50 mM Tris–HCl (Bio Basic, Markham, Canada), 10 g/ mL PMSF, 100 mM NaCl, 5 mM EDTA, 1 % Nonidet P-40, and protease and phosphatase inhibitor cocktail ...
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