Abstract:
:Programmed death-1 (PD-1) belongs to the CD28 family of co-stimulatory and co-inhibitory molecules and regulates adaptive immunity. This molecule induces the development of regulatory T cells, T cell tolerance, or apoptosis. We examined the role of PD-1 pathway in Theiler's murine encephalomyelitis virus (TMEV)-induced demyelinating disease (TMEV-IDD) mice. Up-regulation of PD-1 and PD-1 ligand-1 (PD-L1) mRNA expression in bone marrow-derived dendritic cells were induced by TMEV infection in vitro. Furthermore, PD-1 and PD-L1 mRNA expression was increased in the spinal cords of the TMEV-infected mice in vivo. Treatment with a blocking monoclonal antibody (mAb) against PD-1, especially during the effector phase, resulted in significant deterioration of the TMEV-IDD both clinically and histologically. Flow cytometric analysis revealed a dramatically increase of CD4(+) T cells producing Th1 cytokines such as IFN-γ and TNF-α in the spinal cord of anti-PD-1 mAb-treated mice. These results indicate that the PD-1 pathway plays a pivotal regulatory role in the development of TMEV-IDD.
journal_name
J Neuroimmunoljournal_title
Journal of neuroimmunologyauthors
Takizawa S,Kaneyama T,Tsugane S,Takeichi N,Yanagisawa S,Ichikawa M,Yagita H,Kim BS,Koh CSdoi
10.1016/j.jneuroim.2014.06.018subject
Has Abstractpub_date
2014-09-15 00:00:00pages
78-85issue
1-2eissn
0165-5728issn
1872-8421pii
S0165-5728(14)00189-1journal_volume
274pub_type
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