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Updated: Jan 31, 2026
Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells
Published on: May 22, 2014
Bidirectional Regulation of NLRP3 Inflammasome and Mitochondrial Quality Control in Sepsis: Mechanisms and
Xiangxin Liao1,2,3,4, Yixun Wang1,2,3,4, Zhaohui Zhang1,2,3,4
1Department of Critical Care Medicine, The First Clinical Medical College of China Three Gorges University, Yichang, China.
Abstract:
Characterized by its capacity to induce organ failure, sepsis constitutes a life-threatening pathological state with high incidence and mortality rates. Current treatments primarily focus on antimicrobial therapy and organ support, lacking direct interventions targeting the restoration of cellular or organelle function. Among these mechanisms, mitochondrial dysfunction and overactivation of the NLR family pyrin domain-containing 3 (NLRP3) inflammasome stand out as key pathological hallmarks. As a classic inflammasome, the NLRP3 inflammasome, upon activation, drives cellular pyroptosis and massive release of inflammatory mediators. Beyond their role as cellular energy generators, mitochondria participate in the modulation of inflammatory responses and oxidative stress control. Mitochondrial quality control (MQC) serves as a prerequisite for the orderly performance of mitochondrial physiological functions. Disruption of MQC invariably results in mitochondrial dysfunction, triggering liberation of mitochondrial reactive oxygen species (mtROS) along with mitochondrial damage-associated molecular patterns (mtDAMPs), which serve as direct triggers for NLRP3 inflammasome formation and stimulation. This process disrupts MQC, exacerbates mitochondrial dysfunction, and forms a mutually reinforcing "MQC imbalance-NLRP3 overactivation" vicious cycle that drives disease progression. This review aims to: (1) systematically elucidate the complex bidirectional regulatory mechanisms between the NLRP3 inflammasome and MQC in the context of sepsis, (2) summarize the latest research progress on targeted intervention strategies based on this vicious cycle, and (3) discuss the challenges in clinical translation and future directions of these strategies.
Insights
Sepsis involves mitochondrial dysfunction and NLRP3 inflammasome overactivation, creating a harmful cycle. Targeting this "MQC imbalance-NLRP3 overactivation" vicious cycle offers new therapeutic strategies for sepsis treatment.
Area of Science:
- Cellular Biology
- Immunology
- Pathophysiology
Background:
- Sepsis is a life-threatening condition characterized by organ failure, high mortality, and limited treatment options.
- Key pathological hallmarks include mitochondrial dysfunction and overactivation of the NLR family pyrin domain-containing 3 (NLRP3) inflammasome.
- Current treatments lack direct interventions for cellular or organelle function restoration.
Purpose of the Study:
- To elucidate the bidirectional regulatory mechanisms between NLRP3 inflammasome and mitochondrial quality control (MQC) in sepsis.
- To summarize recent research on targeted interventions addressing the MQC imbalance-NLRP3 overactivation vicious cycle.
- To discuss clinical translation challenges and future directions for these strategies.
Main Methods:
- Systematic review of literature on sepsis pathophysiology.
- Analysis of molecular mechanisms linking MQC and NLRP3 inflammasome.
- Synthesis of current research on therapeutic strategies targeting this cycle.
Main Results:
- Disruption of MQC leads to mitochondrial dysfunction, releasing mtROS and mtDAMPs.
- These factors directly trigger NLRP3 inflammasome activation, exacerbating mitochondrial dysfunction.
- A vicious cycle of "MQC imbalance-NLRP3 overactivation" drives sepsis progression.
Conclusions:
- The interplay between MQC and NLRP3 inflammasome is a critical driver of sepsis.
- Targeting this vicious cycle presents a promising therapeutic avenue for sepsis.
- Further research is needed to overcome clinical translation challenges.
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