JAK2 is Constitutively Associated with C-Kit and is Phosphorylated in Response to Stem Cell Factor

  • Diana Linnekin
  • Sarah R. Weiler
  • Sherry Mou
  • Candy S. DeBerry
  • Jonathan R. Keller
  • Francis W. Ruscetti
  • Douglas K. Ferris
  • Dan L. Longo


Stem cell factor (SCF) interacts with the receptor tyrosine kinase c-kit and has potent effects on hematopoiesis. We have examined the role of JAK2 in the SCF signal transduction pathway. JAK2 and c-kit were constitutively associated and treatment with SCF resulted in rapid and transient tyrosine phosphorylation of JAK2. Incubation of cells with JAK2 antisense oligonucleotides resulted in significant decreases in SCF-induced proliferation. These data suggest that JAK2 plays a role in SCF-induced proliferation.


Tyrosine Phosphorylation Antisense Oligonucleotide Stem Cell Factor Erythropoietin Receptor Steel Factor 
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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • Diana Linnekin
    • 1
    • 3
  • Sarah R. Weiler
    • 1
  • Sherry Mou
    • 2
  • Candy S. DeBerry
    • 1
  • Jonathan R. Keller
    • 2
  • Francis W. Ruscetti
    • 1
  • Douglas K. Ferris
    • 2
  • Dan L. Longo
    • 1
  1. 1.Laboratory of Leukocyte Biology, Biological Response Modifiers Program Division of Cancer TreatmentNational Cancer Institute Frederick Cancer Research and Development CenterFrederickUSA
  2. 2.Biological Carcinogenesis and Development Program SAIC FrederickNational Cancer Institute-Frederick Cancer Research and Development CenterFrederickUSA
  3. 3.Blg. 567, Rm 226, Laboratory of Leukocyte Biology, Biological Response Modifiers Program, Division of Cancer Treatment, National Cancer InstituteFrederick Cancer Research and Development CenterFrederickUSA

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