Open AccessKeratinocyte-specific deletion of SHARPIN induces atopic dermatitis-like inflammation in mice
Author(s) -
John P. Sundberg,
C. Herbert Pratt,
Leslie P. Goodwin,
Kathleen A. Silva,
Victoria E. Kennedy,
Christopher S. Potter,
Anisa Dunham,
Beth A. Sundberg,
Harm HogenEsch
Publication year - 2020
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0235295
Subject(s) - inflammation , atopic dermatitis , immunology , biology , cre recombinase , phenotype , transgene , mutant , genetically modified mouse , genetics , gene
Spontaneous mutations in the SHANK-associated RH domain interacting protein ( Sharpin ) resulted in a severe autoinflammatory type of chronic proliferative dermatitis, inflammation in other organs, and lymphoid organ defects. To determine whether cell-type restricted loss of Sharpin causes similar lesions, a conditional null mutant was created. Ubiquitously expressing cre -recombinase recapitulated the phenotype seen in spontaneous mutant mice. Limiting expression to keratinocytes (using a Krt14-cre ) induced a chronic eosinophilic dermatitis, but no inflammation in other organs or lymphoid organ defects. The dermatitis was associated with a markedly increased concentration of serum IgE and IL18. Crosses with S100a4-cre resulted in milder skin lesions and moderate to severe arthritis. This conditional null mutant will enable more detailed studies on the role of SHARPIN in regulating NFkB and inflammation, while the Krt14-Sharpin -/- provides a new model to study atopic dermatitis.