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Micro RNA-155 participates in re-activation of encephalitogenic T cells

2015
Micro RNA-155 participates.pdf (462.5Kb)
Аутори:
Jevtić, Bojan
Timotijevic, Gordana
Stanisavljević, Suzana
Momčilović, Miljana B.
Stojkovic, Marija Mostarica
Miljković, Đorđe M.
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Апстракт:
MicroRNAs (miR) are small non-coding RNAs involved in the immune response regulation. miR-155 has been attributed a major pro-inflammatory role in the pathogenesis of multiple sclerosis and its animal model experimental autoimmune encephalomyelitis (EAE). Here, a role of miR-155 in re-activation of encephalitogenic CD4(+) T cells was investigated. Dark Agouti rats were immunized with myelin basic protein (MBP) emulsified in complete Freund's adjuvant. CD4(+) T cells were purified from draining lymph node cells (DLNC) obtained in the inductive phase and from spinal cord immune cells (SCIC) isolated at the peak of EAE. CD4(+) T cells obtained from SCIC (i.e., in vivo re-activated cells) had markedly higher expression of miR-155 in comparison to those purified from DLNC (not re-activated). Likewise, in vitro re-activation of DLNC with MBP led to increase in miR-155 expression. Further, DLNC and DLNC CD4(+) T cells were transfected with an inhibitor of miR-155 during in vitro re-activation. As a result, expression of important CD4(+) T cell effector cytokines IFN-gamma and IL-17, but not of regulatory cytokines IL-10 and TGF-beta, was reduced. These results imply that miR-155 supports re-activation of encephalitogenic CD4+ T cells. Our results contribute to a view that miR-155 might be a valuable target in multiple sclerosis therapy. (C) 2015 Elsevier Masson SAS. All rights reserved.
Кључне речи:
micro RNA; Cytokines; Autoimmunity; Central nervous system
Извор:
Biomedicine & Pharmacotherapy, 2015, 74, 206-210

DOI: 10.1016/j.biopha.2015.08.011

ISSN: 1950-6007

WoS: 000361182600031

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URI
http://ibiss-r.rcub.bg.ac.rs/123456789/1919
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