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Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells
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The NOD-like receptor NLRP12 attenuates colon inflammation and tumorigenesis

Md Hasan Zaki1, Peter Vogel, R K Subbarao Malireddi

  • 1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.

Cancer Cell
|November 19, 2011
PubMed

Insights

NLRP12 (Nod-like receptor 12) normally suppresses inflammation. Mice lacking NLRP12 show increased susceptibility to colon inflammation and colorectal tumors due to unchecked inflammatory pathways.

Area of Science:

  • Immunology
  • Molecular Biology
  • Gastroenterology

Background:

  • The intracellular Nod-like receptor (NLR) family protein NLRP12 is implicated in regulating inflammatory cytokine production.
  • The precise physiological role of NLRP12 in inflammation and associated diseases remains largely uncharacterized.

Purpose of the Study:

  • To investigate the function of NLRP12 in inflammatory conditions, specifically focusing on colitis and colorectal tumorigenesis.
  • To elucidate the molecular mechanisms by which NLRP12 influences inflammatory responses and tumor development.

Main Methods:

  • Analysis of Nlrp12-deficient mice models.
  • Assessment of inflammatory cytokine and chemokine production in the colon.
  • Evaluation of NF-κB and ERK activation pathways in macrophages.
  • Monitoring of colon inflammation and colorectal tumor development.

Main Results:

  • Nlrp12-deficient mice exhibited heightened susceptibility to colon inflammation and colorectal tumorigenesis.
  • Increased production of inflammatory cytokines, chemokines, and tumorigenic factors was observed in Nlrp12-deficient mice.
  • Failure to dampen NF-κB and ERK activation in macrophages contributed to enhanced inflammation and tumor growth.
  • NLRP12 deficiency led to a breakdown in intestinal homeostasis.

Conclusions:

  • NLRP12 plays a critical role in maintaining intestinal homeostasis.
  • NLRP12 acts as a crucial protector against the development of colorectal tumorigenesis.
  • Targeting NLRP12 may offer therapeutic strategies for inflammatory bowel diseases and colorectal cancer.

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