How NOD2 mutations predispose to Crohn's disease?
Microbes Infect
; 9(5): 658-63, 2007 Apr.
Article
em En
| MEDLINE
| ID: mdl-17379562
ABSTRACT
NOD2 mutations are associated with the development of granulomatous inflammatory diseases, such as early-onset sarcoidosis (EOS), Blau syndrome (BS) and Crohn's disease (CD). As a pathogen-recognition molecule for muramyl dipeptide (MDP), NOD2 controls both innate and adaptive immune responses, through the regulation of cytokines, chemokines and antimicrobial peptides production. Notably, Nod2-deficient mice experienced increased susceptibility to enteric infection and to antigen-specific colitis. Furthermore, mutant mice bearing the orthologue of the major CD-associated NOD2(3020ins) allele showed increased susceptibility to DSS-induced colitis. However, many questions remain open. (i) Is antimicrobial function deficiency sufficient to initiate the development of CD? (ii) How impaired and mutant NOD2 might lead to increased adaptive immune response? (iii) How do the other disease-associated NOD2 mutations contribute to the development of chronic intestinal inflammation? Whatever the relevant mechanism(s), it provides a casual link between abnormal bacterial sensing and development of inflammatory disorders. Further work should now focus on restoring abnormal NOD2 function by modulating antimicrobial function and regulatory mechanisms of the adaptive immune system.
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Base de dados:
MEDLINE
Assunto principal:
Doença de Crohn
/
Predisposição Genética para Doença
/
Proteína Adaptadora de Sinalização NOD2
Idioma:
En
Ano de publicação:
2007
Tipo de documento:
Article