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  • Title: Patients with psoriasis have elevated levels of serum eosinophil cationic protein and increased numbers of EG2 positive eosinophils in the duodenal stroma.
    Author: Michaëlsson G, Kraaz W, Gerdén B, Hagforsen E, Lundin IP, Lööf L, Sj-oberg O, Scheynius A.
    Journal: Br J Dermatol; 1996 Sep; 135(3):371-8. PubMed ID: 8949428.
    Abstract:
    The occurrence of EG2-positive (EG2+) eosinophils and IgE in biopsy specimens of duodenal mucosa and skin from 39 psoriasis patients was studied, with emphasis on the relation to serum eosinophil cationic protein (ECP), serum IgE and the presence or absence of serum IgA and IgG antigliadin antibodies. Psoriasis patients had significantly elevated serum levels of ECP even after exclusion of five of 37 sera which were Phadiatop positive. The elevated serum ECP was not associated with the presence of IgA or IgG antibodies to gliadin. After exclusion of Phadiatop positive sera the serum IgE values did not differ from those of a group of healthy blood donors. Patients with psoriasis had a pronounced increase of EG2+ cells in their duodenal stroma. Patients without antibodies to gliadin tended to have even more EG2+ cells than those with such antibodies and those with increased duodenal intraepithelial lymphocytes. IgE+ cells were present in most duodenal specimens, and in some specimens there were > 100 IgE+ cells/section. The number of EG2+ cells was increased in lesional skin and, in some patients, also in non-involved skin, but there was a more pronounced increase in EG2 reactivity in the duodenal than in the skin specimens. IgE reactivity was increased both in non-involved and involved skin and was significantly related to the number of IgE-positive cells in the duodenal stroma. The results of this study indicate that the gastrointestinal tract and the eosinophil granulocyte might be involved in psoriasis in a hitherto unknown way.
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