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  • Title: FOXP3 T regulatory cells in lesions of oral lichen planus correlated with disease activity.
    Author: Tao XA, Xia J, Chen XB, Wang H, Dai YH, Rhodus NL, Cheng B.
    Journal: Oral Dis; 2010 Jan; 16(1):76-82. PubMed ID: 19650850.
    Abstract:
    OBJECTIVE: The aim of this study was to determine the correlation between the number of FOXP3(+) T cell in lesions and the disease activity of patients with oral lichen planus (OLP). MATERIALS AND METHODS: The expression of FOXP3 was investigated using immunohistochemical staining and real-time RT-PCR in 23 OLP lesions and 12 controls. Changes of FOXP3(+) Treg in peripheral blood from three patients' pre and post-treatment were assessed using flow cytometry. RESULTS: Few FOXP3(+) cells were detected in controls, but an increased number of FOXP3(+) cells were observed in lesions (n = 20, 40.99 +/- 24.68 cells per high-power field - hpf). Furthermore, the frequency of FOXP3(+) Treg in reticular OLP (n = 7, 63.6 +/- 23.2 cells per hpf) was significantly higher than that in erythematous/erosive OLP (n = 13, 28.8 +/- 16.8 cells per hpf, P = 0.001). In addition, negative correlation was found between the number of FOXP3(+) Treg and disease activity (correlation oefficient = -0.557, P = 0.013). The proportion of FOXP3(+) Treg showed remarkable increase in peripheral blood from patients after treatment (1.39 +/- 0.71%vs 4.91 +/- 1.59%). CONCLUSIONS: These data indicated that FOXP3(+) Treg were involved in the pathogenesis of OLP and correlated with disease's subtype and activity.
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