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Published on: November 11, 2016
TXNIP: A key protein in the cellular stress response pathway and a potential therapeutic target
Eui-Hwan Choi1, Sun-Ji Park2,3
1New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu, 41061, South Korea.
Abstract:
Thioredoxin-interacting protein (TXNIP), which is also known as thioredoxin-binding protein 2 (TBP2), directly interacts with the major antioxidant protein thioredoxin (TRX) and inhibits its antioxidant function and expression. However, recent studies have demonstrated that TXNIP is a multifunctional protein with functions beyond increasing intracellular oxidative stress. TXNIP activates endoplasmic reticulum (ER) stress-mediated nucleotide-binding oligomerization domain (NOD)-like receptor protein-3 (NLRP3) inflammasome complex formation, triggers mitochondrial stress-induced apoptosis, and stimulates inflammatory cell death (pyroptosis). These newly discovered functions of TXNIP highlight its role in disease development, especially in response to several cellular stress factors. In this review, we provide an overview of the multiple functions of TXNIP in pathological conditions and summarize its involvement in various diseases, such as diabetes, chronic kidney disease, and neurodegenerative diseases. We also discuss the potential of TXNIP as a therapeutic target and TXNIP inhibitors as novel therapeutic drugs for treating these diseases.
Insights
Thioredoxin-interacting protein (TXNIP) has new roles beyond oxidative stress, activating inflammatory responses and cell death. This protein is implicated in diseases like diabetes and neurodegeneration, presenting a potential therapeutic target.
Area of Science:
- Molecular Biology
- Cellular Biology
- Pathology
Background:
- Thioredoxin-interacting protein (TXNIP) interacts with thioredoxin (TRX), inhibiting its antioxidant function.
- Emerging evidence reveals TXNIP's multifaceted roles beyond oxidative stress regulation.
Purpose of the Study:
- To review the diverse functions of TXNIP in pathological conditions.
- To summarize TXNIP's involvement in diseases such as diabetes, chronic kidney disease, and neurodegenerative disorders.
- To explore TXNIP as a potential therapeutic target for novel drug development.
Main Methods:
- Literature review of TXNIP's functions and disease associations.
- Analysis of TXNIP's role in cellular stress pathways.
- Evaluation of TXNIP inhibitors as therapeutic agents.
Main Results:
- TXNIP activates NLRP3 inflammasome, ER stress, mitochondrial apoptosis, and pyroptosis.
- TXNIP plays a significant role in the pathogenesis of diabetes, CKD, and neurodegenerative diseases.
- TXNIP's diverse functions underscore its importance in disease development.
Conclusions:
- TXNIP is a key mediator of cellular stress responses and inflammatory processes.
- Targeting TXNIP offers a promising therapeutic strategy for various diseases.
- Further research into TXNIP inhibitors could lead to novel treatments.
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