SYK is a critical regulator of FLT3 in acute myeloid leukemia

Cancer Cell. 2014 Feb 10;25(2):226-42. doi: 10.1016/j.ccr.2014.01.022.

Abstract

Cooperative dependencies between mutant oncoproteins and wild-type proteins are critical in cancer pathogenesis and therapy resistance. Although spleen tyrosine kinase (SYK) has been implicated in hematologic malignancies, it is rarely mutated. We used kinase activity profiling to identify collaborators of SYK in acute myeloid leukemia (AML) and determined that FMS-like tyrosine kinase 3 (FLT3) is transactivated by SYK via direct binding. Highly activated SYK is predominantly found in FLT3-ITD positive AML and cooperates with FLT3-ITD to activate MYC transcriptional programs. FLT3-ITD AML cells are more vulnerable to SYK suppression than FLT3 wild-type counterparts. In a FLT3-ITD in vivo model, SYK is indispensable for myeloproliferative disease (MPD) development, and SYK overexpression promotes overt transformation to AML and resistance to FLT3-ITD-targeted therapy.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antimetabolites, Antineoplastic / pharmacology
  • Apoptosis
  • Blotting, Western
  • Cell Proliferation
  • Cell Transformation, Neoplastic*
  • Cells, Cultured
  • Drug Resistance, Neoplasm*
  • Fluorouracil / pharmacology
  • Humans
  • Immunoenzyme Techniques
  • Intracellular Signaling Peptides and Proteins / antagonists & inhibitors
  • Intracellular Signaling Peptides and Proteins / genetics
  • Intracellular Signaling Peptides and Proteins / metabolism*
  • Leukemia, Myeloid, Acute / metabolism
  • Leukemia, Myeloid, Acute / mortality
  • Leukemia, Myeloid, Acute / pathology*
  • Mice
  • Mice, Inbred BALB C
  • Mutation / genetics
  • Phosphorylation
  • Protein Kinase Inhibitors / pharmacology
  • Protein-Tyrosine Kinases / antagonists & inhibitors
  • Protein-Tyrosine Kinases / genetics
  • Protein-Tyrosine Kinases / metabolism*
  • RNA, Messenger / genetics
  • Real-Time Polymerase Chain Reaction
  • Reverse Transcriptase Polymerase Chain Reaction
  • Survival Rate
  • Syk Kinase
  • fms-Like Tyrosine Kinase 3 / antagonists & inhibitors
  • fms-Like Tyrosine Kinase 3 / genetics*
  • fms-Like Tyrosine Kinase 3 / metabolism

Substances

  • Antimetabolites, Antineoplastic
  • Intracellular Signaling Peptides and Proteins
  • Protein Kinase Inhibitors
  • RNA, Messenger
  • FLT3 protein, human
  • Protein-Tyrosine Kinases
  • fms-Like Tyrosine Kinase 3
  • SYK protein, human
  • Syk Kinase
  • Syk protein, mouse
  • Fluorouracil

Associated data

  • GEO/GSE54065