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Updated: Jun 23, 2026

Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays
07:42

Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays

Published on: September 19, 2018

TYK2 is a key regulator of the surveillance of B lymphoid tumors

Dagmar Stoiber1, Boris Kovacic, Christian Schuster

  • 1Department of Pharmacology, Medical University of Vienna, Vienna, Austria.

The Journal of Clinical Investigation
|December 4, 2004
PubMed

Insights

Tyk2 deficiency in mice increases susceptibility to lymphoid leukemia by impairing natural killer (NK) cell tumor surveillance. This suggests Tyk2 is crucial for regulating the immune system's ability to detect and eliminate early-stage tumors.

Area of Science:

  • Immunology
  • Oncology
  • Molecular Biology

Background:

  • Aberrant Janus kinase-Signal transducer and activator of transcription (JAK-STAT) pathway activation is linked to cancer development.
  • Constitutive activation of JAK2 or STAT5 expression can induce leukemia in mice.

Purpose of the Study:

  • To investigate the role of Tyrosine Kinase 2 (TYK2) in lymphoid tumor development and surveillance.
  • To determine if TYK2 plays a role in regulating immune responses against tumors.

Main Methods:

  • Generation and analysis of TYK2-deficient mice in models of Abelson murine leukemia virus (A-MuLV) and TEL-JAK2-induced leukemia.
  • Assessment of cell-autonomous properties of transformed cells.
  • Evaluation of tumor surveillance capacity through transplantation experiments.
  • Measurement of natural killer (NK) and NKT cell cytotoxic activity in vitro.

Main Results:

  • TYK2-deficient mice exhibited higher incidence and shorter latency of B and T lymphoid leukemias compared to wild-type controls.
  • The increased susceptibility was attributed to impaired tumor surveillance, not altered cell-autonomous properties of transformed cells.
  • TYK2-deficient NK and NKT cells showed reduced cytotoxic capacity against tumor cells.
  • Transplantation of TYK2-deficient lymphomas into wild-type hosts resulted in rejection, confirming impaired immune surveillance.

Conclusions:

  • TYK2 is a critical regulator of lymphoid tumor surveillance.
  • NK cells are key players in detecting and eliminating Abelson-induced malignancies.
  • TYK2 deficiency compromises the immune system's ability to control lymphoid tumor development.

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