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Journal Article
Research Support, Non-U.S. Gov't
Immune system alterations in sporadic amyotrophic lateral sclerosis patients suggest an ongoing neuroinflammatory process.
Journal of Neuroimmunology 2009 May 30
In this work we show that patients with sporadic amyotrophic lateral sclerosis exhibit immunological alterations in their blood, with respect to healthy controls, such as: i) increased levels of CD4+ cells and decreased levels of CD8+ T lymphocytes, the latter due to the reduced expression of the anti-apoptotic molecule Bcl-2; ii) significantly reduced CD4+CD25+ regulatory T (Treg) cells and monocytes (CD14+) levels in patients at a less severe stage of disease, suggesting their early recruitment towards the CNS area of primary neurodegeneration; iii) reduced expression of HLA-DR and CCR2 expression, as markers of activation, in monocytes. Since resident microglia partially derives from circulating activated monocytes and Treg cells are known to interact with the local microglia, this study strengthens the hypothesis of an involvement of the adaptive immune system associated with a neuroinflammatory process in the pathobiology of ALS.
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