Abstract：
BACKGROUND:CD8+ T lymphocytes are critical mediators of neuroinflammatory diseases. Understanding the mechanisms that govern the function of this T cell population is crucial to better understanding central nervous system autoimmune disease pathology. We recently identified a novel population of highly cytotoxic c-Met-expressing CD8+ T lymphocytes and found that hepatocyte growth factor (HGF) limits effective murine cytotoxic T cell responses in cancer models. Here, we examined the role of c-Met-expressing CD8+ T cells by using a MOG35-55 T cell-mediated EAE model. METHODS:Mice were subcutaneously immunized with myelin oligodendrocyte glycoprotein peptide (MOG)35-55 in complete Freund's adjuvant (CFA). Peripheral and CNS inflammation was evaluated at peak disease and chronic phase, and c-Met expression by CD8 was evaluated by flow cytometry and immunofluorescence. Molecular, cellular, and killing function analysis were performed by real-time PCR, ELISA, flow cytometry, and killing assay. RESULTS:In the present study, we observed that a fraction of murine effector CD8+ T cells expressed c-Met receptor (c-Met+CD8+) in an experimental autoimmune encephalitis (EAE) model. Phenotypic and functional analysis of c-Met+CD8+ T cells revealed that they recognize the encephalitogenic epitope myelin oligodendrocyte glycoprotein37-50. We demonstrated that this T cell population produces higher levels of interferon-γ and granzyme B ex vivo and that HGF directly restrains the cytolytic function of c-Met+CD8+ T cells in cell-mediated cytotoxicity reactions CONCLUSIONS: Altogether, our findings suggest that the HGF/c-Met pathway could be exploited to modulate CD8+ T cell-mediated neuroinflammation.
journal_name
J Neuroinflammationjournal_title
Journal of neuroinflammationauthors
Benkhoucha M,Senoner I,Lalive PHdoi
10.1186/s12974-019-1676-0subject
Has Abstractpub_date
2020-02-19 00:00:00pages
68issue
1issn
1742-2094pii
10.1186/s12974-019-1676-0journal_volume
17pub_type
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