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FLT3 Signaling

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Description

FLT3 (Fms-like Tyrosine Kinase-3), also known as FLK2 (Fetal Liver Kinase-2) and STK1 (human Stem Cell Kinase-1) was originally isolated as a hematopoietic progenitor cell-specific kinase, and belongs to the Class-III RTK (Receptor Tyrosine Kinase) family to which c-Fms, c-Kit, and the PDGFR (Platelet Derived Growth Factor Receptor) also belong (Ref.1). Normal expression of FLT3 is restricted to haemopoietic progenitor cells in the bone marrow, thymus and lymph nodes, but is also found on other tissues such as placenta, brain, cerebellum and gonads. Aberrantly expressed FLT3 is observed at high levels in a spectrum of hematologic malignancies including 70% to 100% of AML (Acute Myelogenous Leukemia), B-precursor cell ALL (Acute Lymphoblastic Leukemia), a fraction of T-Cell ALL, and CML (Chronic [...]

References:

1.STK-1, the human homolog of Flk-2/Flt-3, is selectively expressed in CD34+ human bone marrow cells and is involved in the proliferation of early progenitor/stem cells.
Small D, Levenstein M, Kim E, Carow C, Amin S, Rockwell P, Witte L, Burrow C, Ratajczak MZ, Gewirtz AM, et al.
Proc Natl Acad Sci U S A. 1994 Jan 18; 91(2): 459-63.
2.Expression of FLT3 receptor and response to FLT3 ligand by leukemic cells.
Drexler HG.
Leukemia. 1996 Apr; 10(4): 588-99. Review.
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