title: Alopecia areata and interleukin-2 receptor.
abstract: Interleukin-2 (IL-2) is a lymphokine produced by activated T cells and its receptor (IL-2R) is expressed on T cells; one of the IL-2R components can be measured as a soluble serum protein (sIL-2R). Levels of sIL-2R were measured as a sign of T cell activation in serum of 12 patients suffering from alopecia areata (totalis or universalis) and in a group of healthy control subjects. An enzyme-linked immunosorbent assay was used to determine the levels of sIL-2R in blood samples drawn during both the active and resting phase of the disease. In patients with alopecia areata in active phase the sIL-2R concentrations were significantly higher than in stable phase and in controls. The biologic role of sIL-2R is still unknown, but one could speculate that T lymphocyte activation with subsequent secretion of IL-2 and IL-2R expression may contribute to the immune inflammatory mechanism of alopecia areata.
authors.affiliation: Department of Dermatology, Ospedali Riuniti, Bergamo, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Valsecchi
authors.forename: G
authors.initials: G
authors.lastname: Imberti
authors.forename: D
authors.initials: D
authors.lastname: Martino
authors.forename: T
authors.initials: T
authors.lastname: Cainelli
mesh_terms: D000293:Adolescent; D000328:Adult; D000506:Alopecia Areata / Q000097:blood / Q000276:immunology*; D002648:Child; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015375:Receptors, Interleukin-2 / Q000032:analysis*
chemical_list: D015375:Receptors, Interleukin-2