What is the function of FLT3?
The FLT3 gene encodes a tyrosine kinase receptor that plays a key role in controlling survival, proliferation and differentiation of hematopoietic cells. Mutations in this gene are critical in causing a deregulation of the delicate balance between cell proliferation and differentiation.
What type of gene is FLT3?
The FLT3 gene provides instructions for making a protein called fms-like tyrosine kinase 3 (FLT3), which is part of a family of proteins called receptor tyrosine kinases (RTKs). Receptor tyrosine kinases transmit signals from the cell surface into the cell through a process called signal transduction.
What is a FLT3 inhibitor?
FLT3 inhibitors are tyrosine kinase inhibitors (TKI) classified into first and next generation inhibitors based on their potency and specificity for FLT3 and their associated downstream targets.
Is FLT3 an oncogene?
It is known that FLT3 is a leukemia oncogene and activating FLT3 mutations are likely to contribute in the development of leukemia in humans. In addition, several small molecule inhibitors have also been implicated in blocking the kinase activity of FLT3 effectively [11–14].
Is FLT3 a proto oncogene?
Role in cancer CD135 is a proto-oncogene, meaning that mutations of this protein can lead to cancer. Mutations of the FLT3 receptor can lead to the development of leukemia, a cancer of bone marrow hematopoietic progenitors.
What is FLT3 test?
Test Details Mutations in the FLT3 gene are common mutations in acute myeloid leukemia (AML). This assay detects internal tandem duplication (ITD) mutations and mutations in the tyrosine kinase domain (TKD) of FLT3.
What is FLT3 TKD mutation?
FLT3-TKD mutations are small mutations in the activation loop of FLT3, mostly representing point mutations in codon D835 or deletions of codon I836. They induce constitutive tyrosine phosphorylation leading to activation of the receptor tyrosine kinase and are supposed to represent gain-of-function mutations.
Is FLT3 a growth factor?
Abstract. The flt3 ligand is a member of a small family of growth factors that stimulate the proliferation of hematopoietic cells; other members of this family include Steel factor (also known as mast cell growth factor, stem cell factor, and kit ligand) and colony stimulating factor 1.
Is FLT3 ligand a cytokine?
Flt3 ligand (FL) is a hematopoietic four helical bundle cytokine. It is structurally homologous to stem cell factor (SCF) and colony stimulating factor 1 (CSF-1). In synergy with other growth factors, Flt3 ligand stimulates the proliferation and differentiation of various blood cell progenitors.
Is FLT3 a cytokine?
Two cytokines, fms-related tyrosine kinase 3 ligand (Flt3-L) and granulocyte-macrophage colony-stimulating factor (GM-CSF) are considered to be the essential regulators of dendritic cell (DC) development in vivo.
Which cytokine is responsible for early development of B cells in bone marrow?
TSLP is a cytokine that has stimulatory effects on B cells under in vitro culture conditions and plays a role in early B cell development [47]. Generally, only developing B cells respond to IL-7 signaling [48].
What is positive selection of B cells?
Positive selection requires signaling through the antigen receptor for the cell to survive. Developing B cells are positively selected when the pre-B receptor binds its ligand. (Developing T cells are positively selected for their ability to bind MHC as well as peptide.)