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Ref Type | Journal Article | ||||||||||||
PMID | (25567130) | ||||||||||||
Authors | Canon J, Osgood T, Olson SH, Saiki AY, Robertson R, Yu D, Eksterowicz J, Ye Q, Jin L, Chen A, Zhou J, Cordover D, Kaufman S, Kendall R, Oliner JD, Coxon A, Radinsky R | ||||||||||||
Title | The MDM2 Inhibitor AMG 232 Demonstrates Robust Antitumor Efficacy and Potentiates the Activity of p53-Inducing Cytotoxic Agents. | ||||||||||||
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Abstract Text | p53 is a critical tumor suppressor and is the most frequently inactivated gene in human cancer. Inhibition of the interaction of p53 with its negative regulator MDM2 represents a promising clinical strategy to treat p53 wild-type tumors. AMG 232 is a potential best-in-class inhibitor of the MDM2-p53 interaction and is currently in clinical trials. We characterized the activity of AMG 232 and its effect on p53 signaling in several preclinical tumor models. AMG 232 binds the MDM2 protein with picomolar affinity and robustly induces p53 activity, leading to cell-cycle arrest and inhibition of tumor cell proliferation. AMG 232 treatment inhibited the in vivo growth of several tumor xenografts and led to complete and durable regression of MDM2-amplified SJSA-1 tumors via growth arrest and induction of apoptosis. Therapeutic combination studies of AMG 232 with chemotherapies that induce DNA damage and p53 activity resulted in significantly superior antitumor efficacy and regression, and markedly increased activation of p53 signaling in tumors. These preclinical data support the further evaluation of AMG 232 in clinical trials as both a monotherapy and in combination with standard-of-care cytotoxics. |
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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 wild-type | lung non-small cell carcinoma | sensitive | Cisplatin + KRT-232 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, the combination of KRT-232 (AMG 232) and Platinol (cisplatin) worked synergistically to inhibit tumor growth in a TP53 wild-type non-small cell lung cancer cell line xenograft model, with increased efficacy over either agent alone, resulting in tumor stasis (PMID: 25567130). | 25567130 |
TP53 mutant | Advanced Solid Tumor | resistant | KRT-232 | Preclinical - Cell culture | Actionable | In a preclinical study, KRT-232 (AMG 232) did not inhibit growth of human tumor cell lines harboring TP53 mutations in culture (PMID: 25567130). | 25567130 |
BRAF mut TP53 wild-type | melanoma | sensitive | KRT-232 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, KRT-232 (AMG 232) inhibited growth of a melanoma cell line with wild-type TP53, that also harbored a BRAF mutation, in culture and inhibited tumor growth in a TP53 wild-type BRAF-mutant melanoma cell line xenograft model (PMID: 25567130). | 25567130 |
TP53 wild-type | lung non-small cell carcinoma | sensitive | KRT-232 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, KRT-232 (AMG 232) induced activation of Tp53 target genes and inhibited growth of a non-small cell lung cancer (NSCLC) cell line with wild-type TP53 in culture and inhibited tumor growth in a TP53 wild-type NSCLC cell line xenograft model (PMID: 25567130). | 25567130 |
TP53 wild-type | Advanced Solid Tumor | sensitive | KRT-232 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, KRT-232 (AMG 232) induced activation of Tp53 target genes and inhibited growth of several human tumor cell lines with wild-type TP53 in culture and in cell line xenograft models (PMID: 25567130). | 25567130 |
TP53 wild-type | lung non-small cell carcinoma | sensitive | Carboplatin + KRT-232 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, the combination of KRT-232 (AMG 232) and Paraplatin (carboplatin) worked synergistically to inhibit tumor growth in a TP53 wild-type non-small cell lung cancer cell line xenograft model, with increased efficacy over either agent alone (PMID: 25567130). | 25567130 |