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Vaccinia virus inoculation in sites of allergic skin inflammation elicits a vigorous cutaneous IL-17 response.


ABSTRACT: Eczema vaccinatum (EV) is a complication of smallpox vaccination occurring in patients with atopic dermatitis. In affected individuals, vaccinia virus (VV) spreads through the skin, resulting in large primary lesions and satellite lesions, and infects internal organs. BALB/c mice inoculated with VV at sites of Th2-biased allergic skin inflammation elicited by epicutaneous ovalbumin (OVA) sensitization exhibited larger primary lesions that were erosive, more satellite lesions, and higher viral loads in skin and internal organs than mice inoculated in saline-exposed skin, unsensitized skin, or skin sites with Th1-dominant inflammation. VV inoculation in OVA-sensitized skin induced marked local expression of IL-17 transcripts and massive neutrophil infiltration compared to VV inoculation in saline-exposed skin. Treatment with anti-IL-17 decreased the size of primary lesions, numbers of satellite lesions, and viral loads. Addition of IL-17 promoted VV replication in skin explants. These results suggest that IL-17 may be a potential therapeutic target in EV.

SUBMITTER: Oyoshi MK 

PROVIDER: S-EPMC2736417 | biostudies-literature | 2009 Sep

REPOSITORIES: biostudies-literature

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Vaccinia virus inoculation in sites of allergic skin inflammation elicits a vigorous cutaneous IL-17 response.

Oyoshi Michiko K MK   Elkhal Abdallah A   Kumar Lalit L   Scott Jordan E JE   Koduru Suresh S   He Rui R   Leung Donald Y M DY   Howell Michael D MD   Oettgen Hans C HC   Murphy George F GF   Geha Raif S RS  

Proceedings of the National Academy of Sciences of the United States of America 20090817 35


Eczema vaccinatum (EV) is a complication of smallpox vaccination occurring in patients with atopic dermatitis. In affected individuals, vaccinia virus (VV) spreads through the skin, resulting in large primary lesions and satellite lesions, and infects internal organs. BALB/c mice inoculated with VV at sites of Th2-biased allergic skin inflammation elicited by epicutaneous ovalbumin (OVA) sensitization exhibited larger primary lesions that were erosive, more satellite lesions, and higher viral lo  ...[more]

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