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Cytokine milieu of atopic dermatitis skin subverts the innate immune response to vaccinia virus. | LitMetric

Cytokine milieu of atopic dermatitis skin subverts the innate immune response to vaccinia virus.

Immunity

Division of Allergy and Immunology, Department of Pediatrics, National Jewish Medical and Research Center, University of Colorado Health Sciences Center, Denver, Colorado 80206, USA.

Published: March 2006

AI Article Synopsis

Article Abstract

Atopic dermatitis (AD) is associated with eczema vaccinatum (EV), a disseminated viral skin infection that follows inoculation with vaccinia virus (VV). This study examined whether AD skin can control VV replication, and the role of IL-4 and IL-13 in modulating the human cathelicidin LL-37, an antimicrobial peptide that kills VV. AD skin exhibited increased VV replication and decreased LL-37 expression compared to normal or psoriasis skin. IL-4/IL-13 enhanced VV replication while downregulating LL-37 in VV-stimulated keratinocytes. Neutralizing IL-4/IL-13 in AD skin augmented LL-37 and inhibited VV replication. Cathelicidins were induced via toll-like receptor-3 and were inhibited by IL-4/IL-13 through STAT-6. Skin from cathelicidin-deficient mice exhibited reduced ability to control VV replication. Exogenous LL-37 controlled vaccinia viral replication in infected keratinocytes and AD skin explants. The current study demonstrates that Th2 cytokines enhance VV replication in AD skin by subverting the innate immune response against VV in a STAT-6-dependent manner.

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Source
http://dx.doi.org/10.1016/j.immuni.2006.02.006DOI Listing

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