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Lh2 Case Study

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T helper 17 cells Retinoid Acid Related Orphan Receptor Gamma t (RORγt) mRNA in Systemic Lupus Erythematosus Abstract Background: Systemic lupus erythematosus (SLE) is a systemic autoimmune disease characterized by various immunological abnormalities, including dis-regulating activation B lymphocytes with subsequent production of a large quantity of autoreactive-antibodies. It is also hypothesized that T helper-17 lymphocytes (TH-17) may have a role in this disease. The aim of the present study: was to determine the role of TH-17 cells expressing the retinoid acid related orphan receptor gamma t (RORγt) mRNA in the pathogenesis of SLE disease. Subjects and Methods: The study was conducted on 30 female SLE patients fulfilling SLICCA …show more content…

SLE disease is of a marked female predominance. Naïve CD4 T lymphocytes (TH) cells are activated by the antigenic stimulation of T cell receptor (TCR) and are subsequently differentiated into three different subsets of effector helper cells (TH-1, TH-2, TH-17) in order to boost the immune responses1 . Their differentiation depends on cytokines that present early during immune response, involvement of transcription activation and genetic modification of cytokine genes3. Cytokine signaling induces the activation of specific transcription factors to promote lineage-specific cytokine production4,5. TH-1 cells require STAT1 and STAT4 transcription factors for their development and production of IFN-γ. They are mainly devoted to protection against intracellular microbes. TH2 cells require STAT6 and GATA-3 transcription factors for their development and production of IL-4, -5, -9 and -13 cytokines. They are involved in the protection against gastrointestinal nematodes, but are also responsible for allergic disorders. The balance between Th1/Th2 cells is important for inducing autoimmune and allergic immune responses4. TH-17 cells are the more recently described T Helper lymphocyte subsets. They are differentiated from naïve CD4 cells after

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