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Ref Type | Journal Article | ||||||||||||
PMID | (31699977) | ||||||||||||
Authors | Fok JHL, Ramos-Montoya A, Vazquez-Chantada M, Wijnhoven PWG, Follia V, James N, Farrington PM, Karmokar A, Willis SE, Cairns J, Nikkilä J, Beattie D, Lamont GM, Finlay MRV, Wilson J, Smith A, O'Connor LO, Ling S, Fawell SE, O'Connor MJ, Hollingsworth SJ, Dean E, Goldberg FW, Davies BR, Cadogan EB | ||||||||||||
Title | AZD7648 is a potent and selective DNA-PK inhibitor that enhances radiation, chemotherapy and olaparib activity. | ||||||||||||
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Abstract Text | DNA-dependent protein kinase (DNA-PK) is a critical player in the DNA damage response (DDR) and instrumental in the non-homologous end-joining pathway (NHEJ) used to detect and repair DNA double-strand breaks (DSBs). We demonstrate that the potent and highly selective DNA-PK inhibitor, AZD7648, is an efficient sensitizer of radiation- and doxorubicin-induced DNA damage, with combinations in xenograft and patient-derived xenograft (PDX) models inducing sustained regressions. Using ATM-deficient cells, we demonstrate that AZD7648, in combination with the PARP inhibitor olaparib, increases genomic instability, resulting in cell growth inhibition and apoptosis. AZD7648 enhanced olaparib efficacy across a range of doses and schedules in xenograft and PDX models, enabling sustained tumour regression and providing a clear rationale for its clinical investigation. Through its differentiated mechanism of action as an NHEJ inhibitor, AZD7648 complements the current armamentarium of DDR-targeted agents and has potential in combination with these agents to achieve deeper responses to current therapies. |
Molecular Profile | Treatment Approach |
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Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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AZD7648 | AZD-7648|AZD 7648 | DNA_PK Inhibitor 9 | AZD7648 is an inhibitor of DNA-dependent protein kinase (DNA-PK), which potentially enhances genomic instability and sensitizes tumor cells to DNA-damaging agents (PMID: 31699977, PMID: 31851518). |
Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
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Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
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TP53 mutant | ovarian cancer | predicted - sensitive | Olaparib | Preclinical - Pdx | Actionable | In a preclinical study, Lynparza (olaparib) treatment inhibited tumor growth but did not induce regression in a patient-derived xenograft (PDX) model of ovarian cancer harboring wild-type ATM and TP53 mutation (PMID: 31699977). | 31699977 |
ATM del | head and neck cancer | sensitive | Olaparib | Preclinical - Cell culture | Actionable | In a preclinical study, Lynparza (olaparib) treatment induced genomic instability, cell cycle arrest, and inhibited viability of an ATM knockout head and neck cancer cell line in culture (PMID: 31699977). | 31699977 |
ATM del | lung non-small cell carcinoma | sensitive | AZD7648 + Olaparib | Preclinical - Cell culture | Actionable | In a preclinical study, AZD7648 treatment increased sensitivity to Lynparza (olaparib), inducing cell cycle arrest and inhibiting viability of ATM knockout non-small cell lung carcinoma cells in culture (PMID: 31699977). | 31699977 |
ATM del | lung non-small cell carcinoma | sensitive | AZD7648 | Preclinical - Cell culture | Actionable | In a preclinical study, AZD7648 treatment inhibited viability of ATM knockout non-small cell lung carcinoma cells in culture (PMID: 31699977). | 31699977 |
ATM del | head and neck cancer | sensitive | AZD7648 | Preclinical - Cell culture | Actionable | In a preclinical study, AZD7648 treatment induced genomic instability, cell cycle arrest, and inhibited viability of an ATM knockout head and neck cancer cell line in culture (PMID: 31699977). | 31699977 |
TP53 mutant | ovarian cancer | predicted - sensitive | AZD7648 + Olaparib | Preclinical - Pdx | Actionable | In a preclinical study, AZD7648 and Lynparza (olaparib) combination treatment induced tumor regression in a patient-derived xenograft (PDX) model of ovarian cancer harboring TP53 mutation and wild-type ATM (PMID: 31699977). | 31699977 |
ATM del | head and neck cancer | sensitive | AZD7648 + Olaparib | Preclinical - Cell line xenograft | Actionable | In a preclinical study, AZD7648 treatment increased sensitivity to Lynparza (olaparib), resulting in inhibition of Dna-pk phosphorylation, reduced cell viability, genomic instability, cell cycle arrest, and apoptosis in a head and neck cancer cell line with ATM deletion in culture, and inhibition of tumor growth and complete tumor regression in a cell line xenograft model (PMID: 31699977). | 31699977 |
TP53 mutant | ovarian cancer | sensitive | AZD7648 | Preclinical - Pdx | Actionable | In a preclinical study, AZD7648 treatment inhibited tumor growth in a patient-derived xenograft (PDX) model of ovarian cancer harboring a TP53 mutation and wild-type ATM (PMID: 31699977). | 31699977 |
ATM del | lung non-small cell carcinoma | sensitive | Olaparib | Preclinical - Cell culture | Actionable | In a preclinical study, Lynparza (olaparib) treatment inhibited viability of ATM knockout non-small cell lung carcinoma cells in culture (PMID: 31699977). | 31699977 |