Reduced efficacy of circulating costimulatory cells after focal cerebral ischemia
Background and Purpose— - - Cerebral ischemia is ensued by a cellular immune depression syndrome. The postischemic functional capacity of T lymphocytes is controversial, and interactions between leukocyte subsets are largely unknown. Understanding the immunologic interplay between antigen-presentin...
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| Main Authors: | , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
29 Sep 2011
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| In: |
Stroke
Year: 2011, Volume: 42, Issue: 12, Pages: 3580-3586 |
| ISSN: | 1524-4628 |
| DOI: | 10.1161/STROKEAHA.111.620948 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1161/STROKEAHA.111.620948 Verlag, lizenzpflichtig, Volltext: https://www.ahajournals.org/doi/10.1161/STROKEAHA.111.620948 
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| Author Notes: | Andreas Hug, Arthur Liesz, Bettina Muerle, Wei Zhou, Julia Ehrenheim, Alexander Lorenz, Alexander Dalpke, Roland Veltkamp |
| Summary: | Background and Purpose— - - Cerebral ischemia is ensued by a cellular immune depression syndrome. The postischemic functional capacity of T lymphocytes is controversial, and interactions between leukocyte subsets are largely unknown. Understanding the immunologic interplay between antigen-presenting cells and lymphocytes as well as between distinct lymphocyte subsets after stroke might be of clinical/therapeutic significance because animal data argue for a cerebroprotective effect of, for example, CD4+CD25+ regulatory T cells. - - Methods— - - Ex vivo CD4+ T cell proliferation was analyzed in experimental and human stroke using fluorescence activated cell sorter analysis. To investigate suppressive effects of CD4+CD25+ regulatory T cells as well as the influence of costimulatory cells on CD4+ T cell proliferation, subsets were magnetically sorted before proliferation assay setup. - - Results— - - After stroke: (1) proliferation of mouse and human CD4+ T cells on T cell receptor stimulation was unaltered; (2) the suppressive effect of CD4+CD25+ regulatory T cells in mouse and man was unaltered; and (3) efficacy of circulating costimulatory cells from stroke animals was reduced by a mean of 0.6 (SEM 0.1, P=0.001) CD4+ T cell division numbers compared with sham-treated animals. - - Conclusions— - - Reduced costimulatory efficacy of circulating costimulatory cells in mice is an important feature of stroke-induced immunodepression. Understanding the interplay of costimulatory cells and responder T cells (eg, CD4+ T cells or CD4+CD25+ regulatory T cells) after stroke may offer new insights into the prevention of secondary inflammatory damage to the brain and help to guide new therapeutic strategies. |
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| Item Description: | Gesehen am 01.07.2022 |
| Physical Description: | Online Resource |
| ISSN: | 1524-4628 |
| DOI: | 10.1161/STROKEAHA.111.620948 |