Role of FLT3 in leukemia
| Autor: | D. G. Gilliland, James D. Griffin |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Receptors
Cell Surface Biology medicine.disease_cause Myelogenous Broad spectrum fluids and secretions Proto-Oncogene Proteins hemic and lymphatic diseases medicine Animals Humans Gene Mutation Receptor Protein-Tyrosine Kinases hemic and immune systems Hematology medicine.disease Leukemia Cell Transformation Neoplastic fms-Like Tyrosine Kinase 3 Leukemia Myeloid Acute Disease embryonic structures Fms-Like Tyrosine Kinase 3 Flt3 mutation Cancer research Flt3 ligand |
| Zdroj: | Current Opinion in Hematology. 9:274-281 |
| ISSN: | 1065-6251 |
| Popis: | FLT3 is the most frequently mutated gene in cases of acute myelogenous leukemia (AML). About 30 to 35% of patients have either internal tandem duplications (ITDs) in the juxtamembrane domain or mutations in the activating loop of FLT3. FLT3 mutations occur in a broad spectrum of FAB subtypes in adult and pediatric AML and are particularly common in acute promyelocytic leukemia (APL). FLT3 mutations confer a poor prognosis in most retrospective studies. The consequence of either FLT3-ITD or activating loop mutations, which occur predominantly at position D835, is constitutive activation of the tyrosine kinase; FLT3 mutants confer factor-independent growth to Ba/F3 and 32D cells and activate similar transduction pathways as the native receptor in response to ligand, including the STAT, RAS/mitogen-activated protein kinase (MAPK), and phosphatidylinositol 3; kinase (PI3K)/AKT pathways. Injection of FLT3-ITD transformed cells, such as Ba/F3 or 32D, into syngeneic recipient mice results in a leukemia-like syndrome, and expression in primary murine bone marrow cells in a retroviral transduction assay results in a myeloproliferative disorder. Mutations that abrogate FLT3 kinase activity result in loss of transforming properties in these assays. Further, FLT3-selective inhibitors impair transformation of primary AML cells that harbor these mutations, and also inhibit FLT3 transformed hematopoietic cell lines, and leukemias induced by activated FLT3 mutants in murine models. Collectively, these data indicate that FLT3 may be a viable therapeutic target for treatment of AML. |
| Databáze: | OpenAIRE |
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