Conditional DC depletion does not affect priming of encephalitogenic T h cells in EAE

M Isaksson, BA Lundgren, KM Ahlgren… - European journal of …, 2012 - Wiley Online Library
M Isaksson, BA Lundgren, KM Ahlgren, O Kämpe, A Lobell
European journal of immunology, 2012Wiley Online Library
EAE, an animal model for multiple sclerosis, is a T h17‐and T h1‐cell‐mediated auto‐
immune disease, but the mechanisms leading to priming of encephalitogenic T cells in
autoimmune neuroinflammation are poorly understood. To investigate the role of dendritic
cells (DCs) in the initiation of autoimmune T h17‐and T h1‐cell responses and EAE, we
used mice transgenic for a simian diphtheria toxin receptor (DTR) expressed under the
control of the murine CD 11c promoter (CD 11c‐DTR mice on C 57 BL/6 background). EAE …
EAE, an animal model for multiple sclerosis, is a Th17‐ and Th1‐cell‐mediated auto‐immune disease, but the mechanisms leading to priming of encephalitogenicTcells in autoimmune neuroinflammation are poorly understood. To investigate the role of dendritic cells (DCs) in the initiation of autoimmuneTh17‐ andTh1‐cell responses andEAE, we used mice transgenic for a simian diphtheria toxin receptor (DTR) expressed under the control of the murineCD11c promoter (CD11c‐DTRmice onC57BL/6 background).EAEwas induced by immunization with myelin oligodendrocyte glycoprotein (MOG) protein in CFA. DCs were depleted on the day before and 8 days afterMOG immunization. The mean clinicalEAEscore was only mildly reduced inDC‐depleted mice when DCs were ablated beforeEAEinduction. The frequency of activatedTh cells was not altered, andMOG‐inducedTh17 orTh1‐cell responses were not altered, in the spleens ofDC‐depleted mice. Similar results were obtained ifDCswere ablated the first 10 days afterMOGimmunization with repeatedDCdepletions. Unexpectedly, transient depletion of DCs did not affect priming or differentiation of MOG‐inducedTh17 andTh1‐cell responses or the incidence ofEAE. Thus, the mechansim of priming ofTh cells inEAEremains to be elucidated.
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