文章基本信息

标题：Nanovesicles from adipose-derived mesenchymal stem cells inhibit T lymphocyte trafficking and ameliorate chronic experimental autoimmune encephalomyelitis
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作者：Alessia Farinazzo ; Stefano Angiari ; Ermanna Turano 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：7473
DOI：10.1038/s41598-018-25676-2
语种：English
出版社：Springer Nature
摘要：Cell based-therapies represent promising strategies for the treatment of neurological diseases. We have previously shown that adipose stem cells (ASC) ameliorate chronic experimental autoimmune encephalomyelitis (EAE). Recent evidence indicates that most ASC paracrine effects are mediated by extracellular vesicles, i.e. micro- and nanovesicles (MVs and NVs). We show that preventive intravenous administration of NVs isolated from ASC (ASC-NVs) before disease onset significantly reduces the severity of EAE and decreases spinal cord inflammation and demyelination, whereas therapeutic treatment with ASC-NVs does not ameliorate established EAE. This treatment marginally inhibits antigen-specific T cell activation, while reducing microglial activation and demyelination in the spinal cord. Importantly, ASC-NVs inhibited integrin-dependent adhesion of encephalitogenic T cells in vitro, with no effect on adhesion molecule expression. In addition, intravital microscopy showed that encephalitogenic T cells treated with ASC NVs display a significantly reduced rolling and firm adhesion in inflamed spinal cord vessels compared to untreated cells. Our results show that ASC-NVs ameliorate EAE pathogenesis mainly by inhibiting T cell extravasation in the inflamed CNS, suggesting that NVs may represent a novel therapeutic approach in neuro-inflammatory diseases, enabling the safe administration of ASC effector factors.