TYK2: An Upstream Kinase of STATs in Cancer

Katharina Wöss1, Natalija Simonović1, Birgit Strobl1

  • 1Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna, A-1210 Vienna, Austria.

Cancers
|November 8, 2019
PubMed

Insights

Protein tyrosine kinase 2 (TYK2) has oncogenic potential, driving cancer through STAT3/5 activation. Dysregulated TYK2, including mutations, is implicated in various cancers, with potential therapeutic interventions discussed.

Area of Science:

  • Oncology
  • Immunology
  • Molecular Biology

Background:

  • Protein tyrosine kinase 2 (TYK2) plays a critical role in cytokine signaling and immune responses.
  • Its involvement in carcinogenesis is increasingly recognized, particularly through the activation of STAT3 and STAT5 pathways.

Purpose of the Study:

  • To review recent findings on the oncogenic potential of TYK2.
  • To elucidate the role of TYK2 in cytokine responses, carcinogenesis, and immunological functions.

Main Methods:

  • Review of recent literature focusing on TYK2.
  • Analysis of data from loss-of-function studies in gene-modified mice and human patients with TYK2 mutations.
  • Reference to existing reviews for detailed structure/function and pathobiology.

Main Results:

  • Dysregulated TYK2 activation, elevated protein levels, and gain-of-function mutations are observed in various cancers.
  • TYK2 is central to immunological and inflammatory responses, as evidenced by genetic studies.
  • Aberrant TYK2 signaling contributes to cancer development and progression.

Conclusions:

  • TYK2 is a significant factor in cancer development and progression.
  • Understanding TYK2's role in cytokine signaling and immune evasion is crucial for cancer therapy.
  • Targeting TYK2 activity presents a potential therapeutic strategy for various cancers.

Related Concept Videos

mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
4.6K
The JAK-STAT Signaling Pathway01:20

The JAK-STAT Signaling Pathway

Several cytokine receptors have tightly bound Janus kinase or JAK proteins attached at their cytosolic tail. Small signaling molecules such as cytokines, growth hormones, or prolactins bind to the cytokine receptors and initiate their dimerization. The dimerization brings the cytosolic JAKs together that trans-phosphorylate and activates each other. The activated JAKs now phosphorylate cytosolic tails of the cytokine receptors, which serve as binding sites for adaptor proteins such as  SH2...
11.7K
PI3K/mTOR/AKT Signaling Pathway01:22

PI3K/mTOR/AKT Signaling Pathway

The mammalian target of rapamycin  (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1  (mTORC1) and mTOR complex 2  (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast,  mTORC2 consists of a...
5.2K
M-Cdk Drives Transition Into Mitosis02:15

M-Cdk Drives Transition Into Mitosis

Checkpoints throughout the cell cycle serve as safeguards and gatekeepers, allowing the cell cycle to progress in favorable conditions and slow or halt it in problematic ones. This regulation is known as the cell cycle control system.
Cyclin-dependent kinases, or Cdks, work in concert with cyclins to control cell cycle transitions. M-Cdk, a complex of Cdk1 bound to M cyclin, is a well-known example of this coordinated control that drives the transition from the G2 to the M phase.
M cyclin...
6.2K
Receptor Tyrosine Kinases01:26

Receptor Tyrosine Kinases

Receptor tyrosine kinases or RTKs are membrane-bound receptors that phosphorylate specific tyrosine on protein substrates. RTKs regulate cellular growth, differentiation, survival, and migration. They contain an extracellular ligand binding domain, a transmembrane domain, and a cytosolic tail with intrinsic kinase activity. Several extracellular signaling molecules activate RTKs in one or more ways and relay the signal downstream. Ligands such as platelet-derived growth factor (PDGF) or...
17.6K
Cancer-Critical Genes II: Tumor Suppressor Genes01:05

Cancer-Critical Genes II: Tumor Suppressor Genes

Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
9.3K