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Assessment of Resistance to Tyrosine Kinase Inhibitors by an Interrogation of Signal Transduction Pathways by Antibody Arrays
Published on: September 19, 2018
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.
Abstract:
In this review we concentrate on the recent findings describing the oncogenic potential of the protein tyrosine kinase 2 (TYK2). The overview on the current understanding of TYK2 functions in cytokine responses and carcinogenesis focusses on the activation of the signal transducers and activators of transcription (STAT) 3 and 5. Insight gained from loss-of-function (LOF) gene-modified mice and human patients homozygous for Tyk2/TYK2-mutated alleles established the central role in immunological and inflammatory responses. For the description of physiological TYK2 structure/function relationships in cytokine signaling and of overarching molecular and pathologic properties in carcinogenesis, we mainly refer to the most recent reviews. Dysregulated TYK2 activation, aberrant TYK2 protein levels, and gain-of-function (GOF) TYK2 mutations are found in various cancers. We discuss the molecular consequences thereof and briefly describe the molecular means to counteract TYK2 activity under (patho-)physiological conditions by cellular effectors and by pharmacological intervention. For the role of TYK2 in tumor immune-surveillance we refer to the recent Special Issue of Cancers "JAK-STAT Signaling Pathway in Cancer".
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.
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