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Elucidating the role of

Despite the low selenium content in the body (20–40 mg), selenoenzymes play an important role in antioxidant defense in humans.Selenium administration may be associated with improved outcomes, but further studies are needed to determine the precise mechanism of action.The lesions may develop into overt tumors and the malignant T cells can sometimes spread to lymph nodes and internal organs.Patients diagnosed in early stages often experience an indolent disease course and have a favorable prognosis with a life expectancy similar to that of age-matched controls.IL-17A expression is also increased and a significant number of patients express high levels of both IL-17A and IL-17F.Concomitantly, we observed that the expression of the IL-17 receptor is significantly increased in CTCL skin lesions compared with control subjects.Inappropriately regulated expression of interleukin (IL)-17A is associated with the development of inflammatory diseases and cancer.

At 24 hours after transfection, the cells were lysed and the luciferase activities were determined with the use of the Dual-Luciferase Reporter Assay from Promega.Here, we show that a set of malignant T-cell lines established from patients with cutaneous T-cell lymphoma (CTCL) spontaneously secrete IL-17F and that inhibitors of Janus kinases and Signal transducer and activator of transcription 3 are able to block that secretion.Other malignant T-cell lines produce IL-17A but not IL-17F.Studies consistently demonstrate decreased selenium concentration in plasma and whole blood in some critically ill patients, especially those with septic shock, and have suggested that persistent low concentrations may be associated with worse outcomes.However, clinical trials of selenium administration have not consistently or convincingly demonstrated improved outcomes.Studies are also needed to determine optimal dosing regimens, and to identify those patients in whom this approach is likely to be most effective.Currently, doses below the tolerable upper intake level (400 μg) may be used in supplementation.Jak inhibitor I (P6) and Jak3 inhibitor II (WHI-P154) were purchased from Merck Millipore (Darmstadt, Germany) and Sta-21 and Tyrphostin Ag1478 inhibitors were purchased from Enzo Life Sciences (Plymouth Meeting, PA).Dimethylsulfoxide, phorbol 12-myristate 13-acetate (PMA), and ionomycin chemical reagents were obtained from Sigma-Aldrich (St.Upon activation, however, some of the malignant T-cell lines are able to coexpress IL-17A and IL-17F, leading to formation of IL-17A/F heterodimers.Clinically, we demonstrate that IL-17F messenger RNA expression is significantly increased in CTCL skin lesions compared with healthy donors and patients with chronic dermatitis.


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