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Supplementary Material for: Narrowband Ultraviolet B Interferes with Gene Expression in the Peripheral Blood T Cells of Patients with Psoriasis

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posted on 2013-04-25, 00:00 authored by Li J., Hou R., Yang Y., Liu R., Zhao X., Li X., Yin G., An P., Wang Y., Zhang K.
Background: Psoriasis pathogenesis and development are closely related to abnormal T cell activity. Narrowband ultraviolet B (NB-UVB) treatment markedly improves skin lesions in psoriasis. Objectives: To investigate differential gene expression in psoriasis and to understand the possible mechanisms of NB-UVB therapy for psoriasis. Methods: The mRNA expression profiles and differentially expressed genes from peripheral blood T cells of psoriatic patients before and after NB-UVB treatment were examined using RNA sequencing and validated by real-time reverse-transcription polymerase chain reaction. Results: A total of 129 genes were differentially expressed in the peripheral blood T cells of psoriatic patients: 83 genes were downregulated and 46 were upregulated in psoriatic patients compared to those of healthy subjects. These genes were enriched in intracellular membrane-bound organelles, membrane-bound organelles and the nucleus, and are involved in the cell cycle, apoptosis, inflammation and other processes. These changes are reversed in psoriatic patients with good clinical outcomes following NB-UVB treatment. Conclusion: NB-UVB treatment has beneficial effects on local psoriatic lesions, possibly due to its effect on peripheral blood T cell gene expression.

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