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Purpose <p>The gastrointestinal (GI) tract is a highly immunologically active organ where coordinated crosstalk between Toll-like receptor 4 (TLR4) and NLRP3 inflammasome maintains epithelial integrity, supports mucosal repair, and promotes immune tolerance. This review aims to summarize current understanding of TLR4–NLRP3 interactions in the gut, examine their in disease, examine their roles in disease, and evaluate emerging therapeutic strategies targeting this axis.</p> Methods <p>A comprehensive review of recent literature was conducted, focusing on regulatory mechanisms governing TLR4–NLRP3 signaling under homeostasis and dysregulation. Studies addressing epithelial barrier function, cytokine signaling, pyroptosis, metabolic endotoxemia, dysbiosis, and gut–brain axis communication were examined. Research using organoids, gut-on-chip system, microbiota modulation, and multi-omics approaches was also evaluated to understand therapeutic and translational advancements.</p> Results <p>Findings indicate that balanced TLR4–NLRP3 signaling preserves epithelial barrier integrity, regulates inflammatory responses, and supports immunological tolerance. Dysregulation disrupts these protective mechanisms and initiates feed-forward cycle of epithelial damage, metabolic endotoxemia, dysbiosis, and heightened cytokine-driven inflammation. Such aberrant activity contributes to major intestinal diseases—including inflammatory bowel disease, necrotizing enterocolitis, and colorectal cancer—as well as extraintestinal conditions such as obesity, type 2 diabetes, and neuroinflammation through gut–brain axis pathways. Novel therapeutic strategies, including selective small-molecule inhibitors and microbiota-based interventions, show potential for targeted modulation.</p> Conclusion <p>The TLR4–NLRP4 axis is a context-dependent regulator of gut and systemic immunity. Targeted modulation of this pathway represents a promising strategy to restore immune homeostasis while preserving host defense, supporting its relevance as a translational therapeutic target across multiple immune-mediated disorders.</p>

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Deciphering the TLR4 and NLRP3 Inflammasome Crosstalk for Therapeutic Restoration of Intestinal and Systemic Immunity

  • 期刊论文

  • 发表日期：

    2026年1月10日

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  • Mohin Modak,
  • Shamsher Singh

摘要

Purpose

The gastrointestinal (GI) tract is a highly immunologically active organ where coordinated crosstalk between Toll-like receptor 4 (TLR4) and NLRP3 inflammasome maintains epithelial integrity, supports mucosal repair, and promotes immune tolerance. This review aims to summarize current understanding of TLR4–NLRP3 interactions in the gut, examine their in disease, examine their roles in disease, and evaluate emerging therapeutic strategies targeting this axis.

Methods

A comprehensive review of recent literature was conducted, focusing on regulatory mechanisms governing TLR4–NLRP3 signaling under homeostasis and dysregulation. Studies addressing epithelial barrier function, cytokine signaling, pyroptosis, metabolic endotoxemia, dysbiosis, and gut–brain axis communication were examined. Research using organoids, gut-on-chip system, microbiota modulation, and multi-omics approaches was also evaluated to understand therapeutic and translational advancements.

Results

Findings indicate that balanced TLR4–NLRP3 signaling preserves epithelial barrier integrity, regulates inflammatory responses, and supports immunological tolerance. Dysregulation disrupts these protective mechanisms and initiates feed-forward cycle of epithelial damage, metabolic endotoxemia, dysbiosis, and heightened cytokine-driven inflammation. Such aberrant activity contributes to major intestinal diseases—including inflammatory bowel disease, necrotizing enterocolitis, and colorectal cancer—as well as extraintestinal conditions such as obesity, type 2 diabetes, and neuroinflammation through gut–brain axis pathways. Novel therapeutic strategies, including selective small-molecule inhibitors and microbiota-based interventions, show potential for targeted modulation.

Conclusion

The TLR4–NLRP4 axis is a context-dependent regulator of gut and systemic immunity. Targeted modulation of this pathway represents a promising strategy to restore immune homeostasis while preserving host defense, supporting its relevance as a translational therapeutic target across multiple immune-mediated disorders.