JAK2 is associated with the c-kit proto-oncogene product and is phosphorylated in response to stem cell factor.
Stem cell factor (SCF) is a hematopoietic growth factor that interacts with the receptor tyrosine kinase, c-kit. We have found that SCF-stimulates rapid and transient tyrosine phosphorylation of JAK2 in human and murine cell lines, as well as in normal human progenitor cells. JAK2 and c-kit were associated in unstimulated ... cells with further recruitment of JAK2 to the c-kit receptor complex after SCF stimulation. Treatment of cells with JAK2 antisense oligonucleotides resulted in a 46% decrease in SCF-induced proliferation. These data demonstrate that SCF induces tyrosine phosphorylation of JAK2 and suggest that JAK2 is a component of the SCF signal transduction pathway.
Mesh Terms:
Animals, Base Sequence, Cell Line, Humans, Janus Kinase 2, Mice, Molecular Sequence Data, Phosphorylation, Protein-Tyrosine Kinases, Proto-Oncogene Proteins, Proto-Oncogene Proteins c-kit, Signal Transduction, Stem Cell Factor
Animals, Base Sequence, Cell Line, Humans, Janus Kinase 2, Mice, Molecular Sequence Data, Phosphorylation, Protein-Tyrosine Kinases, Proto-Oncogene Proteins, Proto-Oncogene Proteins c-kit, Signal Transduction, Stem Cell Factor
Blood
Date: May. 01, 1996
PubMed ID: 8611693
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