Neuroprotective intervention by interferon-γ blockade prevents CD8+ T cell-mediated dendrite and synapse loss.
Neuroprotective intervention by interferon-γ blockade prevents CD8+ T cell-mediated dendrite and synapse loss.
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DOI:
10.1084/jem.20122143
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发表时间:
2013-09-23
期刊:
影响因子:
--
通讯作者:
Merkler D
中科院分区:
文献类型:
--
作者:
Kreutzfeldt M;Bergthaler A;Fernandez M;Brück W;Steinbach K;Vorm M;Coras R;Blümcke I;Bonilla WV;Fleige A;Forman R;Müller W;Becher B;Misgeld T;Kerschensteiner M;Pinschewer DD;Merkler D
IFN-γ produced by CD8+ cytotoxic T cells acts on neurons to induce Stat1-associated loss of dendrites and synapses in a mouse model of viral encephalitis. Neurons are postmitotic and thus irreplaceable cells of the central nervous system (CNS). Accordingly, CNS inflammation with resulting neuronal damage can have devastating consequences. We investigated molecular mediators and structural consequences of CD8+ T lymphocyte (CTL) attack on neurons in vivo. In a viral encephalitis model in mice, disease depended on CTL-derived interferon-γ (IFN-γ) and neuronal IFN-γ signaling. Downstream STAT1 phosphorylation and nuclear translocation in neurons were associated with dendrite and synapse loss (deafferentation). Analogous molecular and structural alterations were also found in human Rasmussen encephalitis, a CTL-mediated human autoimmune disorder of the CNS. Importantly, therapeutic intervention by IFN-γ blocking antibody prevented neuronal deafferentation and clinical disease without reducing CTL responses or CNS infiltration. These findings identify neuronal IFN-γ signaling as a novel target for neuroprotective interventions in CTL-mediated CNS disease.
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