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Metformin Inhibits Inflammation by Targeting the NLRP3 Inflammasome: Linking NF-κB/NEK7/AMPK Signaling to
Dingyi Ning1,2, Chenxin Jiang1, Jiangyan Zeng3
1Queen Mary School, Nanchang University, Nanchang, 330006, People's Republic of China.
Abstract:
Metformin, the first-line treatment for type 2 diabetes, has significant anti-inflammatory functions in addition to controlling blood glucose levels. Although metformin has been proven to inhibit NOD-like receptor pyrin domain containing 3 (NLRP3) inflammasome, the function of mitochondria in this effect has not been fully studied. This review summarizes studies on metformin that could regulate inflammation progression through the Toll-like Receptor 4/Nuclear Factor Kappa B (TLR4/NF-κB) pathway, NIMA-related kinase 7 (NEK7) pathway, AMPK pathway, and Janus kinase 2-Signal Transducer and Activator of Transcription (JAK2-STAT) pathway, with the involvement of mitochondria. The effects of metformin on the mitochondria block the key steps of NLRP3 inflammation activation, including NEK7 assembly, reactive oxygen species (ROS) activation, reduced thioredoxin-interacting protein (TXNIP) expression, and caspase 1-mediated IL-1β/IL-18 maturation. Importantly, we propose that metformin improves the pathological development of common multi-organ diseases by regulating NLRP3-inflammation pathways. These findings highlight the promising treatment potential of metformin in diseases driven by inflammasomes and make it meaningful to implement clinical trials to evaluate its efficacy in NLRP3 inflammasome-driven pathologies beyond diabetes.
Insights
Metformin, a diabetes drug, reduces inflammation by impacting mitochondria and inhibiting NLRP3 inflammasome activation. This suggests potential for treating various diseases beyond diabetes.
Area of Science:
- * Pharmacology
- * Immunology
- * Cellular Biology
Background:
- * Metformin is a primary treatment for type 2 diabetes.
- * It possesses anti-inflammatory properties beyond glucose control.
- * Its role in inhibiting the NOD-like receptor pyrin domain containing 3 (NLRP3) inflammasome is established, but mitochondrial involvement requires further study.
Purpose of the Study:
- * To review how metformin regulates inflammation via multiple pathways.
- * To elucidate the role of mitochondria in metformin's anti-inflammatory effects.
- * To explore metformin's potential in treating inflammasome-driven diseases.
Main Methods:
- * Literature review of studies on metformin, inflammation, and mitochondria.
- * Analysis of metformin's effects on key inflammasome pathways (TLR4/NF-κB, NEK7, AMPK, JAK2-STAT).
- * Examination of metformin's impact on mitochondrial functions related to NLRP3 activation.
Main Results:
- * Metformin regulates inflammation through TLR4/NF-κB, NEK7, AMPK, and JAK2-STAT pathways, involving mitochondria.
- * Metformin's mitochondrial effects inhibit NLRP3 activation steps: NEK7 assembly, reactive oxygen species (ROS) production, thioredoxin-interacting protein (TXNIP) expression, and caspase 1 activity.
- * Metformin reduces IL-1β/IL-18 maturation.
Conclusions:
- * Metformin modulates NLRP3 inflammasome activation through mitochondrial regulation.
- * Metformin shows promise for treating multi-organ diseases associated with inflammasome pathways.
- * Clinical trials are warranted to assess metformin's efficacy in NLRP3 inflammasome-driven pathologies beyond diabetes.
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