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| Ref Type | Journal Article | ||||||||||||
| PMID | (28912176) | ||||||||||||
| Authors | Ruvolo PP, Ma H, Ruvolo VR, Zhang X, Mu H, Schober W, Hernandez I, Gallardo M, Khoury JD, Cortes J, Andreeff M, Post SM | ||||||||||||
| Title | Anexelekto/MER tyrosine kinase inhibitor ONO-7475 arrests growth and kills FMS-like tyrosine kinase 3-internal tandem duplication mutant acute myeloid leukemia cells by diverse mechanisms. | ||||||||||||
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| Abstract Text | Nearly one-third of patients with acute myeloid leukemia have FMS-like tyrosine kinase 3 mutations and thus have poor survival prospects. Receptor tyrosine kinase anexelekto is critical for FMS-like tyrosine kinase 3 signaling and participates in FMS-like tyrosine kinase 3 inhibitor resistance mechanisms. Thus, strategies targeting anexelekto could prove useful for acute myeloid leukemia therapy. ONO-7475 is an inhibitor with high specificity for anexelekto and MER tyrosine kinase. Herein, we report that ONO-7475 potently arrested growth and induced apoptosis in acute myeloid leukemia with internal tandem duplication mutation of FMS-like tyrosine kinase 3. MER tyrosine kinase-lacking MOLM13 cells were sensitive to ONO-7475, while MER tyrosine kinase expressing OCI-AML3 cells were resistant, suggesting that the drug acts via anexelekto in acute myeloid leukemia cells. Reverse phase protein analysis of ONO-7475 treated cells revealed that cell cycle regulators like cyclin dependent kinase 1, cyclin B1, polo-like kinase 1, and retinoblastoma were suppressed. ONO-7475 suppressed cyclin dependent kinase 1, cyclin B1, polo-like kinase 1 gene expression suggesting that anexelekto may regulate the cell cycle, at least in part, via transcriptional mechanisms. Importantly, ONO-7475 was effective in a human FMS-like tyrosine kinase 3 with internal tandem duplication mutant murine xenograft model. Mice fed a diet containing ONO-7475 exhibited significantly longer survival and, interestingly, blocked leukemia cell infiltration in the liver. In summary, ONO-7475 effectively kills acute myeloid leukemia cells in vitro and in vivo by mechanisms that involve disruption of diverse survival and proliferation pathways. | ||||||||||||
| 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 |
|---|---|---|---|---|
| ONO-7475 | ONO7475 | AXL Inhibitor 30 FLT3 Inhibitor 69 MERTK Inhibitor 13 TYRO3 Inhibitor 7 | ONO-7475 inhibits AXL, MERTK, FLT3, and TYRO3, potentially leading to reduced growth and increased apoptosis of tumor cells (PMID: 28912176, PMID: 30501104, PMID: 31953310). |
| 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 |
|---|---|---|---|---|---|---|---|
| AXL pos FLT3 exon 14 ins | acute myeloid leukemia | sensitive | ONO-7475 | Preclinical - Cell line xenograft | Actionable | In a preclinical study, ONO-7475 treatment inhibited phosphorylation of Flt3, Erk and S6, induced apoptosis and cell cycle arrest, and reduced viability of acute myeloid leukemia cell lines expressing AXL and harboring FLT3-ITD in culture, and increased median survival in a cell line xenograft model (PMID: 28912176). | 28912176 |
| AXL pos FLT3 exon 14 ins | acute myeloid leukemia | sensitive | Cytarabine + ONO-7475 | Preclinical - Cell culture | Actionable | In a preclinical study, ONO-7475 combined with Cytosar-U (cytarabine) treatment resulted in enhanced reduction in viability and induction of apoptosis in acute myeloid leukemia cell lines expressing AXL and harboring FLT3-ITD in culture (PMID: 28912176). | 28912176 |