Story perspectives

NOD2 Directs Diverse Immune Pathways, Linking to IBD

7/21/2026

Summary

NOD2 Shapes Immunity

NOD2 signaling induces T helper 2 polarization of immunity (J. Immunol. 2008; Natl Acad. Sci. USA 2011).
NOD2 activation programs dendritic cells to promote interleukin-17 production in human memory T cells (Immunity 2007).
NOD2 stimulation triggers autophagy in dendritic cells, influencing bacterial handling and antigen presentation (Med. 2010).
NOD2 acts as a general sensor of peptidoglycan via muramyl dipeptide detection, linking host-microbe interactions to inflammatory bowel disease genetics (J. Biol. Chem. 2003; Nature 2012).

Summary

Biologics Improve IBD

Vedolizumab proved effective for induction and maintenance of remission in Crohn’s disease in a 2013 NEJM trial.
Ontamalimab, an anti-MAdCAM-1 antibody, showed safety and benefit for moderate-to-severe ulcerative colitis and Crohn’s disease in a 2024 study.
Marks et al. found defective acute inflammation in Crohn’s patients, suggesting an innate immune deficiency.
Prior gastrointestinal infection raises the odds of developing inflammatory bowel disease, according to Axelrad’s 2019 case-control analysis.

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NOD2 Shapes Immunity

NOD2 signaling induces T helper 2 polarization of immunity (J. Immunol. 2008; Natl Acad. Sci. USA 2011).
NOD2 activation programs dendritic cells to promote interleukin-17 production in human memory T cells (Immunity 2007).
NOD2 stimulation triggers autophagy in dendritic cells, influencing bacterial handling and antigen presentation (Med. 2010).
NOD2 acts as a general sensor of peptidoglycan via muramyl dipeptide detection, linking host-microbe interactions to inflammatory bowel disease genetics (J. Biol. Chem. 2003; Nature 2012).

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