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Serum concentrations of interferon-gamma (IFN-g) in patients with alopecia areata: correlation with clinical type and duration of the disease.

Alopecia areata (AA) is a heterogeneous disease characterized by nonscarring hair loss on the scalp or other parts of the body. A wide range of clinical presentations can occur-from a single patch of hair loss (alopecia unilocularis, AUl), multiple patches (alopecia multilocularis, AM) to complete loss of hair on the scalp (alopecia totalis, AT) or the entire body (alopecia universalis, AU). The cause ofAA is unknown although most evidence supports the hypothesis that AA is a T-cell mediated autoimmune disease of the hair follicle and that cytokines play an important role. The aim of the study was to evaluate serum concentrations of interferon-gamma (IFN-g) in patients with AA and the healthy subjects and also to assess a possible association between IFN-g and clinical type and duration of the disease. Sixty patients with AA and 20 healthy controls were enrolled in the study. Serum concentrations of IFN-g were determined by ELISA method. The serum concentration of IFN-g in patients with AA was significantly higher than that in the control group (10.62 +/- 1.09 pg/mL vs 10.02 +/- 0.62 pg/mL, respectively). Significantly elevated serum IFN-g were noticed in patients with AU type (11.81 +/- 1.11 pg/mL), expecialy those suffering from AT (12.30 +/- 0.93 pg/mL), compared with both patients with AUl (10.20 +/- 0.59 pg/mL) and patients with AM clinical type (10.21 +/- 0.78 pg/mL). There was no significant difference in serum IFN-g concentration between patients with AUl and AM group, as well as between patients with AT and AU. No correlations were found between duration of disease and the serum levels of IFN-g. Our findings confirm previously published data that the Th1 type cytokine IFN-g is elevated in the serum of AA patients.


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