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© Research
Publication : Laboratory investigation; a journal of technical methods and pathology

NOD2: a potential target for regulating liver injury

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Laboratory investigation; a journal of technical methods and pathology - 28 Jan 2008

Body-Malapel M, Dharancy S, Berrebi D, Louvet A, Hugot JP, Philpott DJ, Giovannini M, Chareyre F, Pages G, Gantier E, Girardin SE, Garcia I, Hudault S, Conti F, Sansonetti PJ, Chamaillard M, Desreumaux P, Dubuquoy L, Mathurin P

Link to Pubmed [PMID] – 18227809

Lab. Invest. 2008 Mar;88(3):318-27

The recent discovery of bacterial receptors such as NOD2 that contribute to crosstalk between innate and adaptive immune systems in the digestive tract constitutes an important challenge in our understanding of liver injury mechanisms. The present study focuses on NOD2 functions during liver injury. NOD2, TNF-alpha and IFN-gamma mRNA were quantified using real-time PCR in liver samples from patients and mice with liver injury. We evaluated the susceptibility of concanavalin A (ConA) challenge in NOD2-deficient mice (Nod2-/-) compared to wild-type littermates. We tested the effect of muramyl dipeptide (MDP), the specific activator of NOD2, on ConA-induced liver injury in C57BL/6 mice. We studied the cellular distribution and the role of NOD2 in immune cells and hepatocytes. We demonstrated that NOD2, TNF-alpha and IFN-gamma were upregulated during liver injury in mice and humans. Nod2-/- mice were resistant to ConA-induced hepatitis compared to their wild-type littermates, through reduced IFN-gamma production by immune cells. Conversely, administration of MDP exacerbated ConA-induced liver injury. MDP was a strong inducer of IFN-gamma in freshly isolated human PBMC, splenocytes and hepatocytes. Our study supports the hypothesis that NOD2 contributes to liver injury via a regulatory mechanism affecting immune cells infiltrating the liver and hepatocytes. Taken together, our results indicate that NOD2 may represent a new therapeutic target in liver diseases.

http://www.ncbi.nlm.nih.gov/pubmed/18227809