Title |
Expression of TLR-7, MyD88, NF-kB, and INF-α in B Lymphocytes of Mayan Women with Systemic Lupus Erythematosus in Mexico
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Published in |
Frontiers in immunology, February 2016
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DOI | 10.3389/fimmu.2016.00022 |
Pubmed ID | |
Authors |
Guillermo Valencia Pacheco, Irene B. Novelo Noh, Rubí M.-H. Velasco Cárdenas, Angélica V. Angulo Ramírez, Ricardo F. López Villanueva, Irma G. Quintal Ortiz, Ligia G. Alonso Salomón, Norma Pavía Ruz, Nubia A. Rivero Cárdenas |
Abstract |
Systemic lupus erythematosus (SLE) is a chronic inflammatory autoimmune disease involving multiple organs. It is currently accepted that several genetic, environmental, and hormonal factors are contributing to its development. Innate immunity may have a great influence in autoimmunity through Toll-like receptors. TLR-7 recognizing single-strand RNA has been involved in SLE. Its activation induces intracellular signal with attraction of MyD88 and NF-kBp65, leading to IFN-α synthesis which correlate with disease activity. To assess the expression of TLR-7, MyD88, and NF-kBp65 in B lymphocytes of Mayan women with SLE. One hundred patients with SLE and 100 healthy controls, all of them Mayan women, were included. TLR-7 was analyzed on B and T lymphocytes, and MyD88 and NF-kB only in B lymphocytes. Serum INF-α level was evaluated by ELISA. Significant expression (p < 0.0001) of TLR-7 in B and T lymphocytes and serum IFN-α increased (p = 0.034) was observed in patients. MyD88 and NF-kBp65 were also increased in B lymphocytes of patients. TLR-7 and NF-kBp65 expression correlated, but no correlation with INF-α and disease activity was detected. Data support the role of TLR-7 and signal proteins in the pathogenesis of SLE in the Mayan population of Yucatán. |
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