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Elevated semaphorin 5A in patients with Hashimoto's thyroiditis: a case-control study.
Endocrine Connections 2017 November
OBJECTIVE: Hashimoto's thyroiditis (HT) is characterized by elevated specific auto-antibodies, including TgAb and TPOAb. Increasing evidence has demonstrated the essential role of Th17 cells in HT. However, the underlying mechanism is still unclear. Semaphorin 5A (Sema 5A) is involved in several autoimmune diseases through the regulation of immune cells. The aim of the present study was to explore the role of Sema 5A in HT.
METHODS: We measured serum Sema 5A levels in HT (n = 92) and healthy controls (n = 111) by enzyme-linked immunosorbent assay (ELISA). RNA levels of Sema 5A and their receptors (plexin-A1 and plexin-B3), as well as several cytokines (IFN-γ, IL-4 and IL-17), were detected by real-time polymerase chain reaction in peripheral blood mononuclear cells from 23 patients with HT and 31 controls. In addition, we investigated the relationship between serum Sema 5A and HT.
RESULTS: Serum Sema 5A in HT increased significantly compared with healthy controls (P < 0.001). Moreover, serum Sema 5A levels were positively correlated with TgAb (r = 0.511, P < 0.001), TPOAb (r = 0.423, P < 0.001), TSH (r = 0.349, P < 0.001) and IL-17 mRNA expression (r = 0.442, P < 0.001). Increased Sema 5A RNA expression was observed (P = 0.041) in HT compared with controls. In receiver-operating characteristic (ROC) analysis, serum Sema 5A predicted HT with a sensitivity of 79.35% and specificity of 96.40%, and the area under the curve of the ROC curve was 0.836 (95% CI: 0.778-0.884, P < 0.001).
CONCLUSIONS: These data demonstrated elevated serum Sema 5A in HT patients for the first time. Serum Sema 5A levels were correlated with thyroid auto-antibodies and IL-17 mRNA expression. Sema 5A may be involved in immune response of HT patients.
METHODS: We measured serum Sema 5A levels in HT (n = 92) and healthy controls (n = 111) by enzyme-linked immunosorbent assay (ELISA). RNA levels of Sema 5A and their receptors (plexin-A1 and plexin-B3), as well as several cytokines (IFN-γ, IL-4 and IL-17), were detected by real-time polymerase chain reaction in peripheral blood mononuclear cells from 23 patients with HT and 31 controls. In addition, we investigated the relationship between serum Sema 5A and HT.
RESULTS: Serum Sema 5A in HT increased significantly compared with healthy controls (P < 0.001). Moreover, serum Sema 5A levels were positively correlated with TgAb (r = 0.511, P < 0.001), TPOAb (r = 0.423, P < 0.001), TSH (r = 0.349, P < 0.001) and IL-17 mRNA expression (r = 0.442, P < 0.001). Increased Sema 5A RNA expression was observed (P = 0.041) in HT compared with controls. In receiver-operating characteristic (ROC) analysis, serum Sema 5A predicted HT with a sensitivity of 79.35% and specificity of 96.40%, and the area under the curve of the ROC curve was 0.836 (95% CI: 0.778-0.884, P < 0.001).
CONCLUSIONS: These data demonstrated elevated serum Sema 5A in HT patients for the first time. Serum Sema 5A levels were correlated with thyroid auto-antibodies and IL-17 mRNA expression. Sema 5A may be involved in immune response of HT patients.
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