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Updated: Dec 30, 2025

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Published on: September 9, 2021
The role of JAK/STAT signaling pathway and its inhibitors in diseases
Ping Xin1, Xiaoyun Xu1, Chengjie Deng1
1College of Pharmacy, Harbin Medical University-Daqing, Daqing 163319, China.
Abstract:
The JAK/STAT signaling pathway is an universally expressed intracellular signal transduction pathway and involved in many crucial biological processes, including cell proliferation, differentiation, apoptosis, and immune regulation. It provides a direct mechanism for extracellular factors-regulated gene expression. Current researches on this pathway have been focusing on the inflammatory and neoplastic diseases and related drug. The mechanism of JAK/STAT signaling is relatively simple. However, the biological consequences of the pathway are complicated due to its crosstalk with other signaling pathways. In addition, there is increasing evidence indicates that the persistent activation of JAK/STAT signaling pathway is closely related to many immune and inflammatory diseases, yet the specific mechanism remains unclear. Therefore, it is necessary to study the detailed mechanisms of JAK/STAT signaling in disease formation to provide critical reference for clinical treatments of the diseases. In this review, we focus on the structure of JAKs and STATs, the JAK/STAT signaling pathway and its negative regulators, the associated diseases, and the JAK inhibitors for the clinical therapy.
Insights
The Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway regulates cell functions but its persistent activation links to immune diseases. Understanding JAK/STAT signaling mechanisms is crucial for developing effective therapies.
Area of Science:
- Molecular Biology
- Cell Biology
- Immunology
Background:
- The Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway is a key intracellular signaling system.
- It regulates critical cellular processes like proliferation, differentiation, apoptosis, and immune responses.
- Dysregulation of this pathway is implicated in various immune and inflammatory diseases.
Purpose of the Study:
- To review the structure of JAKs and STATs.
- To elucidate the JAK/STAT signaling pathway, its negative regulation, and associated diseases.
- To discuss Janus kinase (JAK) inhibitors for clinical therapy.
Main Methods:
- Literature review of JAK/STAT signaling pathway.
- Analysis of pathway crosstalk and its role in disease.
- Compilation of information on JAK inhibitors.
Main Results:
- The JAK/STAT pathway, while simple in mechanism, has complex biological outcomes due to pathway crosstalk.
- Persistent activation of JAK/STAT signaling is increasingly linked to immune and inflammatory diseases.
- JAK inhibitors show potential for clinical treatment of associated diseases.
Conclusions:
- Further research into the detailed mechanisms of JAK/STAT signaling in disease pathogenesis is essential.
- Understanding these mechanisms will provide critical insights for clinical treatments.
- JAK inhibitors represent a promising therapeutic strategy for diseases involving JAK/STAT pathway dysregulation.
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