Figure 2. Nonubiquitinatable NEMO Knockin Mice Develop Inflammatory Skin Lesions and Splenomegaly.
(A) Gross photograph of a representative 8-month-old nonubiquitinatable NEMO heterozygous female compared with a WT mouse. The nonubiquitinatable NEMO heterozygous mice develop ulcerated and plaque-like lesions distributed throughout the body. Histologically, the plaque-like skin lesions show hyper-keratosis, parakeratosis, keratin pearls, and a hyperproliferative epidermis with rete-ridge-like protrusions into the dermis. Nonlesional skin from the nonubiquitinatable heterozygous NEMO knockin mice shows little histological change relative to WT mice.
(B) qRT-PCR analysis of cytokines from the skin of WT littermates or from lesional or nonlesional skin from heterozygote nonubiquitinatable NEMO knockin mice (n = 3). Cytokines are significantly elevated in both the lesional and nonlesional skin from the nonubiquitinatable NEMO heterozygous mice. SEM, *p < 0.05, ***p < 0.001.
(C) Representative gross picture showing the enlarged spleens present in the heterozygous nonubiquitinatable NEMO female mice relative to WT female littermate control mice. Flow-cytometry gating on the different subsets of splenic immune cells reveals that the percentage of Gr1+CD11b+ cells is greatly increased, suggesting an inflammatory phenotype in the heterozygous nonubiquitinatable NEMO mice.