6533b7d1fe1ef96bd125d86b
RESEARCH PRODUCT
Posttranslationally modified proteins as mediators of sustained intestinal inflammation.
John C. IgweRose Kientsch-engelJiang ChenAndrew RemppisMarkus F. NeurathDavid M. SternHugo A. KatusThoralf WendtAnn Marie SchmidtErwin SchleicherWolfgang StremmelKirsten ThieleStephan SchiekoferPeter P. NawrothMichael MorcosAngelika BierhausMartin AndrassyPer M. HumpertChristian VolzBirgit LiliensiekFrank Autschbachsubject
AdultCell ExtractsMaleReceptor for Advanced Glycation End ProductsInflammationBiologyInflammatory bowel diseasep38 Mitogen-Activated Protein KinasesPathology and Forensic MedicineProinflammatory cytokineRAGE (receptor)MiceGlycationhemic and lymphatic diseasesGene expressionmedicineAnimalsCalgranulin BHumansCalgranulin AIntestinal MucosaReceptors ImmunologicReceptorProtein Kinase InhibitorsMice KnockoutMitogen-Activated Protein Kinase 1Mitogen-Activated Protein Kinase 3LysineNF-kappa Bnutritional and metabolic diseasesEndothelial Cellsmedicine.diseaseNFKB1Inflammatory Bowel DiseasesIntestinesDisease Models AnimalImmunologyCancer researchFemalemedicine.symptomProtein Processing Post-TranslationalRegular Articlesdescription
Oxidative and carbonyl stress leads to generation of N(epsilon)-carboxymethyllysine-modified proteins (CML-mps), which are known to bind the receptor for advanced glycation end products (RAGE) and induce nuclear factor (NF)-kappaB-dependent proinflammatory gene expression. To determine the impact of CML-mps in vivo, RAGE-dependent sustained NF-kappaB activation was studied in resection gut specimens from patients with inflammatory bowel disease. Inflamed gut biopsy tissue demonstrated a significant up-regulation of RAGE and increased NF-kappaB activation. Protein extracts from the inflamed zones, but not from noninflamed resection borders, caused perpetuated NF-kappaB activation in cultured endothelial cells, which was mediated by CML-mps including CML-modified S100 proteins. The resulting NF-kappaB activation, lasting 5 days, was primarily inhibited by either depletion of CML-mps or by the addition of sRAGE, p44/42 and p38 MAPKinase-specific inhibitors. Consistently, CML-mps isolated from inflamed gut areas and rectally applied into mice caused NF-kappaB activation, increased proinflammatory gene expression, and histologically detectable inflammation in wild-type mice, but not in RAGE-/- mice. A comparable up-regulation of NF-kappaB and inflammation on rectal application of CML-mps was observed in IL-10-/- mice. Thus, CML-mps generated in inflammatory lesions have the capacity to elicit a RAGE-dependent intestinal inflammatory response.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-10-01 | The American journal of pathology |