Accumulation and therapeutic modulation of 6-sulfo LacNAc+ dendritic cells in multiple sclerosis
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Abstract
Objective: To examine the potential role of 6-sulfo LacNAc+ (slan) dendritic cells (DCs) displaying pronounced proinflammatory properties in the pathogenesis of multiple sclerosis (MS).
Methods: We determined the presence of slanDCs in demyelinated brain lesions and CSF samples of patients with MS. In addition, we explored the impact of methylprednisolone, interferon-β, glatiramer acetate, or natalizumab on the frequency of blood-circulating slanDCs in patients with MS. We also evaluated whether interferon-β modulates important proinflammatory capabilities of slanDCs.
Results: SlanDCs accumulate in highly inflammatory brain lesions and are present in the majority of CSF samples of patients with MS. Short-term methylprednisolone administration reduces the percentage of slanDCs in blood of patients with MS and the proportion of tumor necrosis factor-α– or CD150-expressing slanDCs. Long-term interferon-β treatment decreases the percentage of blood-circulating slanDCs in contrast to glatiramer acetate or natalizumab. Furthermore, interferon-β inhibits the secretion of proinflammatory cytokines by slanDCs and their capacity to promote proliferation and differentiation of T cells.
Conclusion: Accumulation of slanDCs in highly inflammatory brain lesions and their presence in CSF indicate that slanDCs may play an important role in the immunopathogenesis of MS. The reduction of blood-circulating slanDCs and the inhibition of their proinflammatory properties by methylprednisolone and interferon-β may contribute to the therapeutic efficiency of these drugs in patients with MS.
GLOSSARY
- CTL=
- cytotoxic T lymphocyte;
- DC=
- dendritic cell;
- FCS=
- fetal calf serum;
- GA=
- glatiramer acetate;
- IFN=
- interferon;
- Ig=
- immunoglobulin;
- IL=
- interleukin;
- LPS=
- lipopolysaccharide;
- MP=
- methylprednisolone;
- MS=
- multiple sclerosis;
- NA=
- natalizumab;
- PBMC=
- peripheral blood mononuclear cell;
- PBS=
- phosphate-buffered saline;
- pDC=
- plasmacytoid DC;
- RRMS=
- relapsing-remitting MS;
- slan=
- 6-sulfo LacNAc+;
- Th=
- T helper;
- TNF=
- tumor necrosis factor
Footnotes
Go to Neurology.org/nn for full disclosures. Funding information and disclosures deemed relevant by the authors, if any, are provided at the end of the article. The Article Processing Charge was paid by Zentrale Rechungsstelle University Hospital, Dresden, Germany.
↵* These authors contributed equally to the manuscript.
- Received May 28, 2014.
- Accepted in final form August 18, 2014.
- © 2014 American Academy of Neurology
This is an open access article distributed under the terms of the Creative Commons Attribution-Noncommercial No Derivative 3.0 License, which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially.
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