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Accession IconGSE9241

Disruption of E-cadherin-mediated adhesion induces a functionally distinct pathway of dendritic cell maturation

Organism Icon Homo sapiens
Sample Icon 17 Downloadable Samples
Technology Badge Icon Affymetrix Human Genome U95 Version 2 Array (hgu95av2)

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The maturation of dendritic cells (DCs) after exposure to microbial products or inflammatory mediators plays a critical role in initiating the immune response. We found that maturation can also occur under steady state conditions, triggered by alterations in E-cadherin-mediated DC-DC adhesion. Selective disruption of these interactions induced the typical features of DC maturation including the upregulation of costimulatory molecules, MHC class II, and chemokine receptors. These events were triggered at least in part by activation of the b-catenin pathway. However, unlike maturation induced by microbial products, E-cadherin-stimulated DCs failed to release immunostimulatory cytokines, exhibiting an entirely different transcriptional profile. As a result, E-cadherin-stimulated DCs elicited an entirely different T cell response in vivo, generating T cells with a regulatory as opposed to an effector phenotype. These DCs induced tolerance in vivo and may thus contribute to the elusive steady state tolerogenic DCs.
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