Activated Stat related transcription factors in acute leukemia

Leuk Lymphoma. 1997 Dec;28(1-2):83-8. doi: 10.3109/10428199709058334.


Cell proliferation and differentiation are under the control of cytokines and growth factors. Different signaling pathways are involved in the transmission of a specific signal through successive phosphorylation and dephosphorylation of proteins leading to gene transcription necessary for growth and differentiation. The cytokines and growth factors activate the Stat family of transcription factors. The Jak-Stat pathway is essential for cytokine signal transduction. Dysregulation of this cascade might lead to uncontrolled hematopoiesis. Studies have been carried out to examine the functionality of this pathway in cells from patients with acute leukemia. Members of the Stat protein family (Stat1, Stat3 and Stat5) are constitutively activated in cells collected from some acute leukemias suggesting dysregulation of the Jak-Stat pathway. Evidence of the existence of constitutively activated spliced variants of Stat3 and Stat5 proteins are described. The mechanisms of such activation remain to be clarified.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Acute Disease
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Gene Expression Regulation, Neoplastic*
  • Humans
  • Leukemia / genetics
  • Leukemia / metabolism*
  • Milk Proteins*
  • STAT1 Transcription Factor
  • STAT3 Transcription Factor
  • STAT5 Transcription Factor
  • Signal Transduction*
  • Trans-Activators / genetics
  • Trans-Activators / metabolism*


  • DNA-Binding Proteins
  • Milk Proteins
  • STAT1 Transcription Factor
  • STAT1 protein, human
  • STAT3 Transcription Factor
  • STAT3 protein, human
  • STAT5 Transcription Factor
  • Trans-Activators