4.2 Article

Analysis of TNF-related apoptosis-inducing ligand and receptors and implications in thymus biology and myasthenia gravis

期刊

NEUROMUSCULAR DISORDERS
卷 27, 期 2, 页码 128-135

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.nmd.2016.10.012

关键词

Myasthenia Gravis; Thymoma; Thymic hyperplasia; TRAIL; Medical thymectomy

资金

  1. Akdeniz University, Scientific Research Projects Unit [2012.02.0122.015]

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Myasthenia Gravis is an autoantibody-mediated, neuromuscular junction disease, and is usually associated with thymic abnormalities presented as thymic tumors (similar to 10%) or hyperplastic thymus (similar to 65%). The exact role of thymus in Myasthenia Gravis development is not clear, yet many patients benefit from thymectomy. The apoptotic ligand TNF-Related Apoptosis-Inducing Ligand is thought to be involved in the regulation of thymocyte counts, although conflicting results are reported. We investigated differential expression profiles of TNF-Related Apoptosis-Inducing Ligand and its transmembrane receptors, Nuclear Factor-kB activation status, and apoptotic cell counts in healthy thymic tissue and pathological thymus from Myasthenia Gravis patients. All tissues expressed TNF-Related Apoptosis-Inducing Ligand and its receptors, with hyperplastic tissue having the highest expression levels of death receptors DR4 and DR5. No detectable Nuclear Factor-kB activation, at least via the canonical Protein Kinase A-mediated p65 Ser276 phosphorylation, was evident in any of the tissues studied. Apoptotic cell counts were higher in MG-associated tissue compared to the normal thymus. Possible use of the TNF-Related Apoptosis-Inducing Ligand within the concept of an apoptotic ligand-mediated medical thymectomy in thymoma-or thymic hyperplasia-associated Myasthenia Gravis is also discussed. (C) 2016 Elsevier B.V. All rights reserved.

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