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AZD6738 C화학적 특성, 용도, 생산
개요
AZD 6738 is an orally bioavailable inhibitor of the serine/threonine protein kinase ataxia telangiectasia mutated (ATM) and Rad3-related (ATR; IC50 = 1 nM). It can inhibit ATR substrate Chk1 Ser345 phosphorylation in cells with an IC50 value of 74 nM. AZD 6738 has been shown to inhibit the proliferation of various solid and hematological cell lines with IC50 values of less than 1 μM and to reduce tumor growth in several ATM-deficient xenograft models. When used in combination with either DNA damaging chemotherapy agents or ionizing radiation, AZD 6738 demonstrated synergistic cell killing activity across multiple cell lines in vitro and in xenograft studies.
효소 저해제
This orally active, and selective ATR kinase inhibitor (FW = 412.51 g/mol; CAS 1352226-88-0; Solubility: 80 mg/mL DMSO; < 1 mg/mL H2O) targets Ataxia Telangiectasia/Rad3-related kinase (IC50 = 1 nM), a serine/threonine protein kinase that activates checkpoint signaling upon genotoxic stresses (e.g., ionizing radiation, ultraviolet light, or replication stalling), thereby serving as a DNA damage sensor. In a model consisting of primary human Chronic Myelogenous Leukemia (CL) cells with biallelic TP53 or ATM inactivation xenotransplanted into NOD/Shi scid/IL-2Rγ mice, AZD6738 provides potent and specific inhibition of ATR signalling with compensatory activation of ATM/p53 pathway in cycling CLL cells in the presence of genotoxic stress. In p53 or ATM defective cells, AZD6738 treatment results in replication fork stalls and accumulation of unrepaired DNA damage, as evidenced by γH2AX and 53BP1 foci formation, carried through into mitosis and resulting in cell death by mitotic catastrophe. AZD6738 displays selective cytotoxicity towards ATM- or p53-deficient CLL cells. AZD6738 also potentiates cisplatin and gemcitabine cytotoxicity in Non-Small-Cell Lung Carcinoma (NSCLC) cell lines with intact ATM kinase signaling. It also potently synergizes with cisplatin in ATM-deficient NSCLC cells. When used in combination, cisplatin and AZD6738 resolve ATM-deficient lung cancer xenografts.
