PMID-sentid Pub_year Sent_text compound_name comp_offset prot_official_name organism prot_offset 29149649-3 2018 In our study, Chk1 inhibitors, AZD7762 and MK-8776, had strong antitumor effects on CML cell line KBM5 and imatinib-resistant form KBM5T315I. MK-8776 43-50 checkpoint kinase 1 Homo sapiens 14-18 28957699-0 2017 Randomized phase II trial of cytosine arabinoside with and without the CHK1 inhibitor MK-8776 in relapsed and refractory acute myeloid leukemia. MK-8776 86-93 checkpoint kinase 1 Homo sapiens 71-75 29118324-6 2017 Furthermore, we demonstrated that FANCD2 depletion combined with CHK1 inhibitor MK-8776 significantly potentiated the cytotoxicity of gemcitabine to the two LSC cell lines, compared to individual FANCD2 depletion or MK-8776 treatment. MK-8776 80-87 checkpoint kinase 1 Homo sapiens 65-69 28957699-2 2017 Incorporation of AraC into DNA activates checkpoint kinase 1 (Chk1), leading to cell-cycle arrest and diminished AraC cytotoxicity, which can be reversed by the selective Chk1 inhibitor MK-8776. MK-8776 186-193 checkpoint kinase 1 Homo sapiens 41-60 28957699-2 2017 Incorporation of AraC into DNA activates checkpoint kinase 1 (Chk1), leading to cell-cycle arrest and diminished AraC cytotoxicity, which can be reversed by the selective Chk1 inhibitor MK-8776. MK-8776 186-193 checkpoint kinase 1 Homo sapiens 62-66 28957699-2 2017 Incorporation of AraC into DNA activates checkpoint kinase 1 (Chk1), leading to cell-cycle arrest and diminished AraC cytotoxicity, which can be reversed by the selective Chk1 inhibitor MK-8776. MK-8776 186-193 checkpoint kinase 1 Homo sapiens 171-175 28550769-0 2017 MK-8776, a novel Chk1 inhibitor, exhibits an improved radiosensitizing effect compared to UCN-01 by exacerbating radiation-induced aberrant mitosis. MK-8776 0-7 checkpoint kinase 1 Mus musculus 17-21 28888100-0 2017 Chk1 Inhibitor SCH900776 Effectively Potentiates the Cytotoxic Effects of Platinum-Based Chemotherapeutic Drugs in Human Colon Cancer Cells. MK-8776 15-24 checkpoint kinase 1 Homo sapiens 0-4 28888100-2 2017 Here we newly demonstrate the ability of one of the most specific Chk1 inhibitors, SCH900776 (MK-8776), to enhance human colon cancer cell sensitivity to the cytotoxic effects of platinum(II) cisplatin and platinum(IV)- LA-12 complexes. MK-8776 83-92 checkpoint kinase 1 Homo sapiens 66-70 28888100-2 2017 Here we newly demonstrate the ability of one of the most specific Chk1 inhibitors, SCH900776 (MK-8776), to enhance human colon cancer cell sensitivity to the cytotoxic effects of platinum(II) cisplatin and platinum(IV)- LA-12 complexes. MK-8776 94-101 checkpoint kinase 1 Homo sapiens 66-70 28888100-5 2017 In contrast to their wt counterparts, the p53- or p21-deficient cells treated with SCH900776 and cisplatin or LA-12 enter mitosis and become polyploid, and the senescence phenotype is strongly suppressed. MK-8776 83-92 tumor protein p53 Homo sapiens 42-45 28888100-5 2017 In contrast to their wt counterparts, the p53- or p21-deficient cells treated with SCH900776 and cisplatin or LA-12 enter mitosis and become polyploid, and the senescence phenotype is strongly suppressed. MK-8776 83-92 H3 histone pseudogene 16 Homo sapiens 50-53 28550769-2 2017 Here, we evaluate the radiosensitizing effects of a novel selective Chk1 inhibitor MK-8776, comparing its efficacy with a first-generation Chk1 inhibitor UCN-01, and attempt to elucidate the mechanism of radiosensitization. MK-8776 83-90 checkpoint kinase 1 Mus musculus 68-72 28550769-7 2017 This suggests that Chk1 inhibition by MK-8776 activates a spindle assembly checkpoint and increases mitotic defects in irradiated EMT6 cells. MK-8776 38-45 checkpoint kinase 1 Mus musculus 19-23 27690219-0 2016 MK-8776, a novel chk1 kinase inhibitor, radiosensitizes p53-defective human tumor cells. MK-8776 0-7 checkpoint kinase 1 Homo sapiens 17-21 28978069-7 2017 The Chk1 inhibitor MK-8776 sensitized cells to gemcitabine with the greatest cell killing when added 18 h after gemcitabine. MK-8776 19-26 checkpoint kinase 1 Homo sapiens 4-8 28978069-8 2017 In mice, the administration of MK-8776 18 h after gemcitabine elicited positivity for the DNA damage marker gammaH2AX; this also occurred at relatively low dose (40 mg/kg) gemcitabine. MK-8776 31-38 H2A.X variant histone Mus musculus 108-117 28042876-0 2017 The Chk1 inhibitor MK-8776 increases the radiosensitivity of human triple-negative breast cancer by inhibiting autophagy. MK-8776 19-26 checkpoint kinase 1 Homo sapiens 4-8 27829224-10 2016 We identified two distinct classes of Chk1 inhibitors: those that induced a strong increase in gammaH2AX, pChk1 (S317) and pRPA32 (S4/S8) (including V158411, LY2603618 and ARRY-1A) and those that did not (including MK-8776 and GNE-900). MK-8776 215-222 checkpoint kinase 1 Homo sapiens 38-42 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 cyclin dependent kinase 2 Homo sapiens 25-29 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 BCL2 associated X, apoptosis regulator Homo sapiens 218-221 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 BCL2 like 11 Homo sapiens 223-226 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 apoptotic peptidase activating factor 1 Homo sapiens 228-234 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 caspase 9 Homo sapiens 236-245 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 caspase 3 Homo sapiens 250-259 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 0-7 BCL2 apoptosis regulator Homo sapiens 277-282 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 cyclin dependent kinase 2 Homo sapiens 25-29 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 BCL2 associated X, apoptosis regulator Homo sapiens 218-221 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 BCL2 like 11 Homo sapiens 223-226 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 apoptotic peptidase activating factor 1 Homo sapiens 228-234 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 caspase 9 Homo sapiens 236-245 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 caspase 3 Homo sapiens 250-259 28693160-12 2017 MK-8776 (an inhibitor of CDK2) antagonized the apoptosis induced by ISL, and, compared with treatment with ISL alone, pretreatment with MK-8776 inhibited the decrease in DeltaPsim, downregulated the mRNA expression of Bax, Bim, Apaf-1, caspase-9 and caspase-3, and upregulated Bcl-2 mRNA expression. MK-8776 136-143 BCL2 apoptosis regulator Homo sapiens 277-282 28042876-1 2017 MK-8776 is a recently described inhibitor that is highly selective for checkpoint kinase 1 (Chk1), which can weaken the DNA repair capacity in cancer cells to achieve chemo-sensitization. MK-8776 0-7 checkpoint kinase 1 Homo sapiens 71-90 28042876-1 2017 MK-8776 is a recently described inhibitor that is highly selective for checkpoint kinase 1 (Chk1), which can weaken the DNA repair capacity in cancer cells to achieve chemo-sensitization. MK-8776 0-7 checkpoint kinase 1 Homo sapiens 92-96 27690219-0 2016 MK-8776, a novel chk1 kinase inhibitor, radiosensitizes p53-defective human tumor cells. MK-8776 0-7 tumor protein p53 Homo sapiens 56-59 27690219-2 2016 The aim of this study was to assess the Chk1 kinase inhibitor, MK-8776, for its ability to radiosensitize human tumor cells. MK-8776 63-70 checkpoint kinase 1 Homo sapiens 40-44 27690219-10 2016 A comparison of MK-8776 to the wee1 inhibitor, MK-1775, suggested both similarities and differences in their activities. MK-8776 16-23 WEE1 G2 checkpoint kinase Homo sapiens 31-35 24179152-6 2014 The CHK1 inhibitor MK8776 sensitized acute myeloid leukemia cell lines and primary leukemia specimens to MK1775 ex vivo, whereas smaller effects were observed with the MK1775/MK8776 combination in normal myeloid progenitors. MK-8776 19-25 checkpoint kinase 1 Homo sapiens 4-8 27625304-6 2016 Exposing the patient cells with the high abundance of CHK1 to SCH900776, an inhibitor of the kinase activity of CHK1, reduced clonogenic ability and progression of DNA replication in the presence of cytarabine. MK-8776 62-71 checkpoint kinase 1 Homo sapiens 54-58 27625304-6 2016 Exposing the patient cells with the high abundance of CHK1 to SCH900776, an inhibitor of the kinase activity of CHK1, reduced clonogenic ability and progression of DNA replication in the presence of cytarabine. MK-8776 62-71 checkpoint kinase 1 Homo sapiens 112-116 25372494-4 2015 With the aim of discerning the structural features that affect the inhibitory activity of triazolones, MK-8776, a Chk1 inhibitor that reached the clinical stage, was also used as a reference for simulations. MK-8776 103-110 checkpoint kinase 1 Homo sapiens 114-118 25372494-7 2015 Moreover, introducing hydrophobic groups into triazolone inhibitors is favorable for binding to Chk1, which is corroborated by residue Leu136 with a relatively large difference in the contribution between MK-8776 and five triazolones to the total binding free energies. MK-8776 205-212 checkpoint kinase 1 Homo sapiens 96-100 27556692-3 2016 We initially tested the potential of the highly specific Chk1 inhibitor SCH900776 to synergize with nucleoside analogs (NAs) fludarabine, cytarabine and gemcitabine in cell lines derived from B-cell malignancies. MK-8776 72-81 checkpoint kinase 1 Mus musculus 57-61 27556692-4 2016 In p53-proficient NALM-6 cells, SCH900776 added to NAs enhanced signaling towards Chk1 (pSer317/pSer345), effectively blocked Chk1 activation (Ser296 autophosphorylation), increased replication stress (p53 and gamma-H2AX accumulation) and temporarily potentiated apoptosis. MK-8776 32-41 tumor protein p53 Homo sapiens 3-6 27556692-4 2016 In p53-proficient NALM-6 cells, SCH900776 added to NAs enhanced signaling towards Chk1 (pSer317/pSer345), effectively blocked Chk1 activation (Ser296 autophosphorylation), increased replication stress (p53 and gamma-H2AX accumulation) and temporarily potentiated apoptosis. MK-8776 32-41 checkpoint kinase 1 Homo sapiens 82-86 27556692-4 2016 In p53-proficient NALM-6 cells, SCH900776 added to NAs enhanced signaling towards Chk1 (pSer317/pSer345), effectively blocked Chk1 activation (Ser296 autophosphorylation), increased replication stress (p53 and gamma-H2AX accumulation) and temporarily potentiated apoptosis. MK-8776 32-41 checkpoint kinase 1 Homo sapiens 126-130 27556692-4 2016 In p53-proficient NALM-6 cells, SCH900776 added to NAs enhanced signaling towards Chk1 (pSer317/pSer345), effectively blocked Chk1 activation (Ser296 autophosphorylation), increased replication stress (p53 and gamma-H2AX accumulation) and temporarily potentiated apoptosis. MK-8776 32-41 tumor protein p53 Homo sapiens 202-205 27556692-8 2016 SCH900776 also increased the effect of fludarabine in a proportion of primary CLL samples treated with pro-proliferative stimuli, including those with TP53 disruption. MK-8776 0-9 transformation related protein 53 Mus musculus 151-155 27556692-9 2016 Finally, we observed a fludarabine potentiation by SCH900776 in a T-cell leukemia 1 (TCL1)-driven mouse model of CLL. MK-8776 51-60 T cell lymphoma breakpoint 1 Mus musculus 66-83 27556692-9 2016 Finally, we observed a fludarabine potentiation by SCH900776 in a T-cell leukemia 1 (TCL1)-driven mouse model of CLL. MK-8776 51-60 T cell lymphoma breakpoint 1 Mus musculus 85-89 26595527-0 2016 A subset of cancer cell lines is acutely sensitive to the Chk1 inhibitor MK-8776 as monotherapy due to CDK2 activation in S phase. MK-8776 73-80 checkpoint kinase 1 Homo sapiens 58-62 26595527-0 2016 A subset of cancer cell lines is acutely sensitive to the Chk1 inhibitor MK-8776 as monotherapy due to CDK2 activation in S phase. MK-8776 73-80 cyclin dependent kinase 2 Homo sapiens 103-107 26595527-3 2016 From analysis of a large panel of cell lines, we demonstrate that 15% are very sensitive to the Chk1 inhibitor MK-8776. MK-8776 111-118 checkpoint kinase 1 Homo sapiens 96-100 25605849-0 2015 Phase I dose-escalation trial of checkpoint kinase 1 inhibitor MK-8776 as monotherapy and in combination with gemcitabine in patients with advanced solid tumors. MK-8776 63-70 checkpoint kinase 1 Homo sapiens 33-52 25605849-1 2015 PURPOSE: We determined the safety, pharmacokinetics, pharmacodynamics, and recommended phase II dose of MK-8776 (SCH 900776), a potent, selective checkpoint kinase 1 (Chk1) inhibitor, as monotherapy and in combination with gemcitabine in a first-in-human phase I clinical trial in patients with advanced solid tumor malignancies. MK-8776 104-111 checkpoint kinase 1 Homo sapiens 146-165 25605849-1 2015 PURPOSE: We determined the safety, pharmacokinetics, pharmacodynamics, and recommended phase II dose of MK-8776 (SCH 900776), a potent, selective checkpoint kinase 1 (Chk1) inhibitor, as monotherapy and in combination with gemcitabine in a first-in-human phase I clinical trial in patients with advanced solid tumor malignancies. MK-8776 104-111 checkpoint kinase 1 Homo sapiens 167-171 25605849-1 2015 PURPOSE: We determined the safety, pharmacokinetics, pharmacodynamics, and recommended phase II dose of MK-8776 (SCH 900776), a potent, selective checkpoint kinase 1 (Chk1) inhibitor, as monotherapy and in combination with gemcitabine in a first-in-human phase I clinical trial in patients with advanced solid tumor malignancies. MK-8776 113-123 checkpoint kinase 1 Homo sapiens 167-171 24179152-6 2014 The CHK1 inhibitor MK8776 sensitized acute myeloid leukemia cell lines and primary leukemia specimens to MK1775 ex vivo, whereas smaller effects were observed with the MK1775/MK8776 combination in normal myeloid progenitors. MK-8776 175-181 checkpoint kinase 1 Homo sapiens 4-8 24179152-8 2014 Further studies showed that MK8776 enhanced MK1775-mediated activation of the ATR/CHK1 pathway in acute leukemia cell lines and ex vivo. MK-8776 28-34 ATR serine/threonine kinase Homo sapiens 78-81 24179152-8 2014 Further studies showed that MK8776 enhanced MK1775-mediated activation of the ATR/CHK1 pathway in acute leukemia cell lines and ex vivo. MK-8776 28-34 checkpoint kinase 1 Homo sapiens 82-86 24359526-0 2013 Sensitization of human cancer cells to gemcitabine by the Chk1 inhibitor MK-8776: cell cycle perturbation and impact of administration schedule in vitro and in vivo. MK-8776 73-80 checkpoint kinase 1 Homo sapiens 58-62 24359526-2 2013 Here, we address the importance of appropriate drug scheduling when gemcitabine is combined with the Chk1 inhibitor MK-8776, and the mechanisms involved in the schedule dependence. MK-8776 116-123 checkpoint kinase 1 Homo sapiens 101-105 24359526-14 2013 CONCLUSIONS: There are two reasons why delayed addition of MK-8776 enhances sensitivity to gemcitabine: first, there is an increased number of cells arrested in S phase; and second, the arrested cells have adequate time to initiate recombination and thereby become Chk1 dependent. MK-8776 59-66 checkpoint kinase 1 Homo sapiens 265-269 23148684-5 2012 METHODS: Small molecules MK-8776 and MK-1775 were used to selectively and potently inhibit CHK1 and WEE1, respectively. MK-8776 25-32 checkpoint kinase 1 Homo sapiens 91-95 23897988-11 2013 Microtubule-associated protein/microtubule affinity regulating kinase (MARK) inhibitors decrease blood pressure in dogs, whereas checkpoint kinase (Chk) inhibitors (AZD7762, SCH900776) exhibit dose-limiting CV toxicities in clinical trials. MK-8776 174-183 megakaryocyte-associated tyrosine kinase Homo sapiens 148-151 23536721-0 2013 The novel Chk1 inhibitor MK-8776 sensitizes human leukemia cells to HDAC inhibitors by targeting the intra-S checkpoint and DNA replication and repair. MK-8776 25-32 checkpoint kinase 1 Homo sapiens 10-14 23536721-1 2013 Interactions between the novel Chk1 inhibitor MK-8776 and the histone deacetylase (HDAC) inhibitor (HDACI) vorinostat were examined in human leukemia cells harboring wild-type (wt) or deficient p53. MK-8776 46-53 checkpoint kinase 1 Homo sapiens 31-35 23536721-2 2013 MK-8776 synergistically potentiated vorinostat-mediated apoptosis in various p53-wt or -deficient leukemia cell lines, whereas p53 knockdown by short hairpin RNA (shRNA) sensitized p53-wt cells to lethality of this regimen. MK-8776 0-7 tumor protein p53 Homo sapiens 77-80 23536721-3 2013 Leukemia cell lines carrying FLT3-ITD were also sensitive to the MK-8776/vorinostat regimen. MK-8776 65-72 fms related receptor tyrosine kinase 3 Homo sapiens 29-33 23536721-6 2013 Finally, the MK-8776/vorinostat regimen was active in primary acute myelogenous leukemia (AML) blasts, particularly against the CD34(+)/CD38(-)/CD123(+) population enriched for leukemia-initiating cells. MK-8776 13-20 CD34 molecule Homo sapiens 128-132 23536721-8 2013 Together, these findings indicate that the novel Chk1 inhibitor MK-8776 markedly potentiates HDACI lethality in leukemia cells displaying various genetic backgrounds through mechanisms involving disruption of the intra-S checkpoint, DNA replication, and DNA repair. MK-8776 64-71 checkpoint kinase 1 Homo sapiens 49-53 23092873-2 2012 The selective Chk1 inhibitor SCH 900776 abrogates cytarabine-induced S-phase arrest and enhances cytarabine cytotoxicity in acute leukemia cell lines and leukemic blasts in vitro. MK-8776 29-39 checkpoint kinase 1 Homo sapiens 14-18 24113549-3 2013 In this study, we evaluated the effects of a novel CHK1 inhibitor, MK-8776, in combination with pemetrexed (PMX) on cell proliferation and survival in a panel of p53 mutant non-small cell lung cancer (NSCLC) cell lines. MK-8776 67-74 checkpoint kinase 1 Homo sapiens 51-55 24113549-3 2013 In this study, we evaluated the effects of a novel CHK1 inhibitor, MK-8776, in combination with pemetrexed (PMX) on cell proliferation and survival in a panel of p53 mutant non-small cell lung cancer (NSCLC) cell lines. MK-8776 67-74 tumor protein p53 Homo sapiens 162-165 24113549-8 2013 We examined cell line sensitization to PMX in response to CHK1 inhibition with MK-8776 using WST-1 and clonogenic survival assays. MK-8776 79-86 checkpoint kinase 1 Homo sapiens 58-62 24113549-11 2013 CHK1 inhibition by MK-8776 enhances sensitivity of NSCLC cell lines to PMX. MK-8776 19-26 checkpoint kinase 1 Homo sapiens 0-4 23804422-0 2013 Sensitization of pancreatic cancer to chemoradiation by the Chk1 inhibitor MK8776. MK-8776 75-81 checkpoint kinase 1 Homo sapiens 60-64 23804422-2 2013 To improve upon this regimen, we combined the selective Checkpoint kinase 1 (Chk1) inhibitor MK8776 with gemcitabine-based chemoradiation in preclinical pancreatic cancer models. MK-8776 93-99 checkpoint kinase 1 Homo sapiens 56-75 23804422-2 2013 To improve upon this regimen, we combined the selective Checkpoint kinase 1 (Chk1) inhibitor MK8776 with gemcitabine-based chemoradiation in preclinical pancreatic cancer models. MK-8776 93-99 checkpoint kinase 1 Homo sapiens 77-81 23804422-5 2013 RESULTS: We found that MK8776 significantly sensitized HRR-proficient (AsPC-1, MiaPaCa-2, BxPC-3) but not -deficient (Capan-1) pancreatic cancer cells to gemcitabine-radiation and inhibited Rad51 focus formation in HRR-proficient cells. MK-8776 23-29 RAD51 recombinase Homo sapiens 190-195 23804422-7 2013 We also assessed pChk1 (S345), a pharmacodynamic biomarker of DNA damage in response to Chk1 inhibition in both tumor and small intestine and found that MK8776 combined with gemcitabine or gemcitabine-radiation produced a significantly greater increase in pChk1 (S345) in tumor relative to small intestine, suggesting greater DNA damage in tumor than in normal tissue. MK-8776 153-159 checkpoint kinase 1 Homo sapiens 18-22 23148684-5 2012 METHODS: Small molecules MK-8776 and MK-1775 were used to selectively and potently inhibit CHK1 and WEE1, respectively. MK-8776 25-32 WEE1 G2 checkpoint kinase Homo sapiens 100-104 21321066-0 2011 Targeting the replication checkpoint using SCH 900776, a potent and functionally selective CHK1 inhibitor identified via high content screening. MK-8776 43-53 checkpoint kinase 1 Homo sapiens 91-95 22203733-0 2012 Preclinical development of the novel Chk1 inhibitor SCH900776 in combination with DNA-damaging agents and antimetabolites. MK-8776 52-61 checkpoint kinase 1 Homo sapiens 37-41 22203733-4 2012 SCH900776 is a novel and more selective Chk1 inhibitor that potently inhibits Chk1 and abrogates cell-cycle arrest induced by SN38. MK-8776 0-9 checkpoint kinase 1 Homo sapiens 40-44 22203733-4 2012 SCH900776 is a novel and more selective Chk1 inhibitor that potently inhibits Chk1 and abrogates cell-cycle arrest induced by SN38. MK-8776 0-9 checkpoint kinase 1 Homo sapiens 78-82 22869869-2 2012 In the present study, we examined whether this checkpoint is activated in clinical acute myelogenous leukemia (AML) during cytarabine infusion in vivo and then assessed the impact of combining cytarabine with the recently described Chk1 inhibitor SCH 900776 in vitro. MK-8776 247-257 checkpoint kinase 1 Homo sapiens 232-236 22937147-6 2012 Upon incubation with the Chk1 inhibitor MK-8776, single-stranded DNA regions (ssDNA) and double-strand breaks (DSB) begin to appear within 6 h. These DSB have been attributed to the structure-specific DNA endonuclease, Mus81. MK-8776 40-47 checkpoint kinase 1 Homo sapiens 25-29 22937147-6 2012 Upon incubation with the Chk1 inhibitor MK-8776, single-stranded DNA regions (ssDNA) and double-strand breaks (DSB) begin to appear within 6 h. These DSB have been attributed to the structure-specific DNA endonuclease, Mus81. MK-8776 40-47 MUS81 structure-specific endonuclease subunit Homo sapiens 219-224 22937147-9 2012 These findings were corroborated by the discovery that Mre11-deficient ATLD1 cells are highly resistant to MK-8776 and form neither ssDNA nor DSB following treatment. MK-8776 107-114 MRE11 homolog, double strand break repair nuclease Homo sapiens 55-60 22937147-10 2012 However, once complimented with exogenous Mre11, the cells accumulate both ssDNA and DSB when incubated with MK-8776. MK-8776 109-116 MRE11 homolog, double strand break repair nuclease Homo sapiens 42-47 22937147-12 2012 The results highlight a novel role for Mre11 in the production of DSB and may help define which tumors are more sensitive to MK-8776 alone or in combination with DNA damaging agents. MK-8776 125-132 MRE11 homolog, double strand break repair nuclease Homo sapiens 39-44 21321066-9 2011 Using this approach, SCH 900776 was identified as a highly potent and functionally optimal CHK1 inhibitor with minimal intrinsic antagonistic properties. MK-8776 21-31 checkpoint kinase 1 Homo sapiens 91-95 21321066-10 2011 SCH 900776 exposure phenocopies short interfering RNA-mediated CHK1 ablation and interacts synergistically with DNA antimetabolite agents in vitro and in vivo to selectively induce dsDNA breaks and cell death in tumor cell backgrounds. MK-8776 0-10 checkpoint kinase 1 Homo sapiens 63-67 35418303-10 2022 Furthermore, CHK1 inhibition interferes with E2:ERalpha signaling to cell proliferation, and drugs approved for clinical treatment of primary and MBC (4OH-tamoxifen and the CDK4/CDK6 inhibitors abemaciclib and palbociclib) exert synergic effects with the CHK1 inhibitors in clinical trials for the treatment of solid tumors (AZD7762, MK8776, prexasertib) in preventing the proliferation of cells modeling primary and MBC. MK-8776 334-340 checkpoint kinase 1 Homo sapiens 13-17 34508175-6 2021 Suboptimal doses of the CHK1 inhibitor MK-8776 plus the PARP inhibitor olaparib led to a MYCN-dependent accumulation of DNA damage and cell death in vitro and significantly reduced the growth of four in vivo models of MYCN-driven tumors, without major toxicities. MK-8776 39-46 checkpoint kinase 1 Homo sapiens 24-28 34508175-6 2021 Suboptimal doses of the CHK1 inhibitor MK-8776 plus the PARP inhibitor olaparib led to a MYCN-dependent accumulation of DNA damage and cell death in vitro and significantly reduced the growth of four in vivo models of MYCN-driven tumors, without major toxicities. MK-8776 39-46 MYCN proto-oncogene, bHLH transcription factor Homo sapiens 89-93 34508175-6 2021 Suboptimal doses of the CHK1 inhibitor MK-8776 plus the PARP inhibitor olaparib led to a MYCN-dependent accumulation of DNA damage and cell death in vitro and significantly reduced the growth of four in vivo models of MYCN-driven tumors, without major toxicities. MK-8776 39-46 MYCN proto-oncogene, bHLH transcription factor Homo sapiens 218-222 35418303-10 2022 Furthermore, CHK1 inhibition interferes with E2:ERalpha signaling to cell proliferation, and drugs approved for clinical treatment of primary and MBC (4OH-tamoxifen and the CDK4/CDK6 inhibitors abemaciclib and palbociclib) exert synergic effects with the CHK1 inhibitors in clinical trials for the treatment of solid tumors (AZD7762, MK8776, prexasertib) in preventing the proliferation of cells modeling primary and MBC. MK-8776 334-340 cyclin dependent kinase 4 Homo sapiens 173-177 33986399-3 2021 Here, we investigated the efficacy of combining gemcitabine with MK-8776, a novel CHK1 inhibitor, in four bladder cancer cell lines. MK-8776 65-72 checkpoint kinase 1 Mus musculus 82-86 31683862-8 2019 The Chk1 inhibitor MK-8776 was most effective, reducing viral DNA amplification by 90-99% and caused DNA damage and apoptosis, preferentially in HPV infected cells. MK-8776 19-26 checkpoint kinase 1 Homo sapiens 4-8 33860197-0 2021 Comparative Activity and Off-Target Effects in Cells of the CHK1 Inhibitors MK-8776, SRA737, and LY2606368. MK-8776 76-83 checkpoint kinase 1 Homo sapiens 60-64 33860197-8 2021 LY2606368 was far more potent at inhibiting CHK1 and inducing growth arrest, while all three CHK1i inhibited CHK2 at concentrations 10- (MK-8776 and SRA737) to 100- (LY2606368) fold higher. MK-8776 137-144 checkpoint kinase 1 Homo sapiens 93-98 33860197-9 2021 MK-8776 and SRA737 exhibited similar off-target effects: higher concentrations demonstrated transient protection from growth inhibition, circumvented DNA damage, and prevented checkpoint abrogation, possibly due to inhibition of CDK2. MK-8776 0-7 cyclin dependent kinase 2 Homo sapiens 229-233 32579780-3 2020 CHK1 has been associated with prostate cancer (PCa) induction, progression, and lethality, hence CHK1 inhibitors SCH900776 (also known as MK-8776) and the more effective SCH900776 analog MU380 may have clinical applications in the therapy of PCa. MK-8776 113-122 checkpoint kinase 1 Homo sapiens 97-101 32579780-3 2020 CHK1 has been associated with prostate cancer (PCa) induction, progression, and lethality, hence CHK1 inhibitors SCH900776 (also known as MK-8776) and the more effective SCH900776 analog MU380 may have clinical applications in the therapy of PCa. MK-8776 138-145 checkpoint kinase 1 Homo sapiens 0-4 32579780-3 2020 CHK1 has been associated with prostate cancer (PCa) induction, progression, and lethality, hence CHK1 inhibitors SCH900776 (also known as MK-8776) and the more effective SCH900776 analog MU380 may have clinical applications in the therapy of PCa. MK-8776 138-145 checkpoint kinase 1 Homo sapiens 97-101 32579780-3 2020 CHK1 has been associated with prostate cancer (PCa) induction, progression, and lethality, hence CHK1 inhibitors SCH900776 (also known as MK-8776) and the more effective SCH900776 analog MU380 may have clinical applications in the therapy of PCa. MK-8776 170-179 checkpoint kinase 1 Homo sapiens 0-4 32579780-5 2020 Here we report, that such therapeutic approach may be exploited using the synergistic action of the antimetabolite gemcitabine and CHK1 inhibitors SCH900776 and MU380 in docetaxel-resistant mCRPC. MK-8776 147-156 checkpoint kinase 1 Homo sapiens 131-135 32314919-2 2020 To elucidate the CHK1-regulated phosphorylation network, we performed a global quantitative phosphoproteomics analysis, which revealed 142 phosphosites whose phosphorylation levels were significantly different following treatment with the CHK1 inhibitor SCH 900776. MK-8776 254-264 checkpoint kinase 1 Homo sapiens 17-21 32314919-2 2020 To elucidate the CHK1-regulated phosphorylation network, we performed a global quantitative phosphoproteomics analysis, which revealed 142 phosphosites whose phosphorylation levels were significantly different following treatment with the CHK1 inhibitor SCH 900776. MK-8776 254-264 checkpoint kinase 1 Homo sapiens 239-243 32314919-4 2020 Furthermore, IRF3 phosphorylation at S173 and S175 was significantly reduced following treatment with SCH 900776. MK-8776 102-112 interferon regulatory factor 3 Homo sapiens 13-17 30975911-8 2019 Moreover, in a mouse model of FLT3/ITD acute myeloid leukemia, treatment with the CHK1 inhibitor MK8776 + cytarabine extended survival over cytarabine alone. MK-8776 97-103 FMS-like tyrosine kinase 3 Mus musculus 30-34 30975911-8 2019 Moreover, in a mouse model of FLT3/ITD acute myeloid leukemia, treatment with the CHK1 inhibitor MK8776 + cytarabine extended survival over cytarabine alone. MK-8776 97-103 checkpoint kinase 1 Mus musculus 82-86 30837643-5 2019 Moreover, CHK1 knockdown or addition of a CHK1 inhibitor such as MK-8776, rabusertib or prexasertib enhances CPX-351-induced apoptosis in multiple TP53-null and TP53-wildtype AML cell lines. MK-8776 65-72 checkpoint kinase 1 Homo sapiens 42-46 31443367-0 2019 Chk1 Inhibitor MK-8776 Restores the Sensitivity of Chemotherapeutics in P-glycoprotein Overexpressing Cancer Cells. MK-8776 15-22 checkpoint kinase 1 Homo sapiens 0-4 31443367-0 2019 Chk1 Inhibitor MK-8776 Restores the Sensitivity of Chemotherapeutics in P-glycoprotein Overexpressing Cancer Cells. MK-8776 15-22 ATP binding cassette subfamily B member 1 Homo sapiens 72-86 31443367-3 2019 Here, we report that checkpoint kinase (Chk) 1 inhibitor MK-8776, a drug candidate in clinical trial, can restore the sensitivity of chemotherapeutics that are substrates of P-gp in KB-C2, SW620/Ad300 cells and human embryonic kidney (HEK)293/ABCB1 cells that overexpress P-gp. MK-8776 57-64 checkpoint kinase 1 Homo sapiens 21-46 31443367-3 2019 Here, we report that checkpoint kinase (Chk) 1 inhibitor MK-8776, a drug candidate in clinical trial, can restore the sensitivity of chemotherapeutics that are substrates of P-gp in KB-C2, SW620/Ad300 cells and human embryonic kidney (HEK)293/ABCB1 cells that overexpress P-gp. MK-8776 57-64 ATP binding cassette subfamily B member 1 Homo sapiens 174-178 31443367-3 2019 Here, we report that checkpoint kinase (Chk) 1 inhibitor MK-8776, a drug candidate in clinical trial, can restore the sensitivity of chemotherapeutics that are substrates of P-gp in KB-C2, SW620/Ad300 cells and human embryonic kidney (HEK)293/ABCB1 cells that overexpress P-gp. MK-8776 57-64 ATP binding cassette subfamily B member 1 Homo sapiens 243-248 31443367-3 2019 Here, we report that checkpoint kinase (Chk) 1 inhibitor MK-8776, a drug candidate in clinical trial, can restore the sensitivity of chemotherapeutics that are substrates of P-gp in KB-C2, SW620/Ad300 cells and human embryonic kidney (HEK)293/ABCB1 cells that overexpress P-gp. MK-8776 57-64 ATP binding cassette subfamily B member 1 Homo sapiens 272-276 31443367-4 2019 MK-8776 remarkably enhanced the cellular [3H]-paclitaxel accumulation and suppressed the efflux function of P-gp without reducing its expression and affecting its cellular localization in cancer cells. MK-8776 0-7 ATP binding cassette subfamily B member 1 Homo sapiens 108-112 31443367-5 2019 Furthermore, MK-8776 (0-40 muM) stimulated the activity of ATPase in P-gp, which was 4.1-fold greater than the control. MK-8776 13-20 dynein axonemal heavy chain 8 Homo sapiens 59-65 31443367-5 2019 Furthermore, MK-8776 (0-40 muM) stimulated the activity of ATPase in P-gp, which was 4.1-fold greater than the control. MK-8776 13-20 ATP binding cassette subfamily B member 1 Homo sapiens 69-73 31443367-6 2019 In addition, MK-8776 formed a cation-pi bond and pi-pi interaction with key residues of the substrate-binding site in P-gp, as indicated by computer-aided molecular docking study. MK-8776 13-20 ATP binding cassette subfamily B member 1 Homo sapiens 118-122 31443367-7 2019 Our study indicated that MK-8776 may significantly enhance the sensitivity of chemotherapeutics that are substrates of P-gp, providing important information for its application in the reversal of MDR. MK-8776 25-32 ATP binding cassette subfamily B member 1 Homo sapiens 119-123 30837643-5 2019 Moreover, CHK1 knockdown or addition of a CHK1 inhibitor such as MK-8776, rabusertib or prexasertib enhances CPX-351-induced apoptosis in multiple TP53-null and TP53-wildtype AML cell lines. MK-8776 65-72 tumor protein p53 Homo sapiens 147-151 30837643-5 2019 Moreover, CHK1 knockdown or addition of a CHK1 inhibitor such as MK-8776, rabusertib or prexasertib enhances CPX-351-induced apoptosis in multiple TP53-null and TP53-wildtype AML cell lines. MK-8776 65-72 tumor protein p53 Homo sapiens 161-165 30103170-0 2018 Metronomic oral doxorubicin in combination of Chk1 inhibitor MK-8776 for p53-deficient breast cancer treatment. MK-8776 61-68 checkpoint kinase 1 Homo sapiens 46-50 30103170-0 2018 Metronomic oral doxorubicin in combination of Chk1 inhibitor MK-8776 for p53-deficient breast cancer treatment. MK-8776 61-68 tumor protein p53 Homo sapiens 73-76 30103170-3 2018 In this light, within the limits of p53-deficient breast cancer, we demonstrate the enhanced anticancer effect of metronomic chemotherapy using doxorubicin when combined with Chk1 inhibitor MK-8776 by specifically augmenting the direct cytotoxic effect on cancer cells. MK-8776 190-197 tumor protein p53 Homo sapiens 36-39 30103170-3 2018 In this light, within the limits of p53-deficient breast cancer, we demonstrate the enhanced anticancer effect of metronomic chemotherapy using doxorubicin when combined with Chk1 inhibitor MK-8776 by specifically augmenting the direct cytotoxic effect on cancer cells. MK-8776 190-197 checkpoint kinase 1 Homo sapiens 175-179 30103170-5 2018 MK-8776 selectively enhanced the cytotoxic effect of low-concentration doxorubicin in p53-deficient breast cancer cells by abrogating the Chk1-dependent cell cycle arrest in vitro. MK-8776 0-7 tumor protein p53 Homo sapiens 86-89 30103170-5 2018 MK-8776 selectively enhanced the cytotoxic effect of low-concentration doxorubicin in p53-deficient breast cancer cells by abrogating the Chk1-dependent cell cycle arrest in vitro. MK-8776 0-7 checkpoint kinase 1 Homo sapiens 138-142 30103170-6 2018 Consistently, combining MK-8776 significantly improved the anticancer effect of the daily administered oral doxorubicin in p53-deficient breast cancer xenografts especially in a lower dose of doxorubicin without evident systemic toxicities. MK-8776 24-31 tumor protein p53 Homo sapiens 123-126 30103170-7 2018 Combination therapy of MK-8776 and metronomic oral doxorubicin would be thus promising in the treatment of p53-deficient breast cancer benefited from the augmented direct cytotoxic effect and low risk of toxicities. MK-8776 23-30 tumor protein p53 Homo sapiens 107-110 29895190-3 2018 The goals of this study were to directly compare the relative efficacies of the CHK1 inhibitor MK8776 and the WEE1 inhibitor AZD1775 to sensitize pancreatic cancer cell lines to gemcitabine and to identify pharmacodynamic biomarkers predictive of chemosensitization. MK-8776 95-101 checkpoint kinase 1 Homo sapiens 80-84 29157102-0 2018 Chk1 inhibitor SCH 900776 enhances the antitumor activity of MLN4924 on pancreatic cancer. MK-8776 15-25 checkpoint kinase 1 Mus musculus 0-4 30103203-0 2018 Targeting acute myeloid leukemia CD34+ stem/progenitor cells with small molecule inhibitor MK-8776. MK-8776 91-98 CD34 molecule Homo sapiens 33-37 29895190-6 2018 The abilities of either the CDK1/2 inhibitor roscovitine or exogenous nucleosides to prevent MK8776 or AZD1775-mediated chemosensitization, however, were both inhibitor-dependent and variable among cell lines. MK-8776 93-99 cyclin dependent kinase 12 Homo sapiens 28-34 29157102-3 2018 Chk1 inhibitor SCH 900776 alone exhibited minimal cytotoxicity, and caused no DNA damage on PC cells. MK-8776 15-25 checkpoint kinase 1 Mus musculus 0-4