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Ref Type | Journal Article | ||||||||||||
PMID | (36746437) | ||||||||||||
Authors | Jing CB, Prutsch N, He S, Zimmerman MW, Landesman Y, Look AT | ||||||||||||
Title | Synthetic lethal targeting of TET2-mutant haematopoietic stem and progenitor cells by XPO1 inhibitors. | ||||||||||||
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Abstract Text | TET2 inactivating mutations serve as initiating genetic lesions in the transformation of haematopoietic stem and progenitor cells (HSPCs). In this study, we analysed known drugs in zebrafish embryos for their ability to selectively kill tet2-mutant HSPCs in vivo. We found that the exportin 1 (XPO1) inhibitors, selinexor and eltanexor, selectively kill tet2-mutant HSPCs. In serial replating colony assays, these small molecules were selectively active in killing murine Tet2-deficient Lineage-, Sca1+, Kit+ (LSK) cells, and also TET2-inactivated human acute myeloid leukaemia (AML) cells. Selective killing of TET2-mutant HSPCs and human AML cells by these inhibitors was due to increased levels of apoptosis, without evidence of DNA damage based on increased γH2AX expression. The finding that TET2 loss renders HSPCs and AML cells selectively susceptible to cell death induced by XPO1 inhibitors provides preclinical evidence of the selective activity of these drugs, justifying further clinical studies of these small molecules for the treatment of TET2-mutant haematopoietic malignancies, and to suppress clonal expansion in age-related TET2-mutant clonal haematopoiesis. |
Molecular Profile | Treatment Approach |
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Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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Therapy Name | Drugs | Efficacy Evidence | Clinical Trials |
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Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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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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TET2 del | acute myeloid leukemia | sensitive | Selinexor | Preclinical - Cell culture | Actionable | In a preclinical study, Xpovio (selinexor) induced apoptosis in TET2-knockout acute myeloid leukemia cell lines, resulting in decreased cell viability in culture (PMID: 36746437). | 36746437 |
TET2 del | acute myeloid leukemia | sensitive | Eltanexor | Preclinical - Cell culture | Actionable | In a preclinical study, Eltanexor (KPT-8602) induced apoptosis in TET2-knockout acute myeloid leukemia cell lines, resulting in decreased cell viability in culture (PMID: 36746437). | 36746437 |