Immune activation in the peripheral blood of patients with acute ischemic stroke

Yan, Jun, Greer, Judith M., Etherington, Kellie, Cadigan, Greg P., Cavanagh, Helen, Henderson, Robert D., O'Sullivan, John D., Pandian, Jeyaraj D., Read, Stephen J. and McCombe, Pamela A. (2009) Immune activation in the peripheral blood of patients with acute ischemic stroke. Journal of Neuroimmunology, 206 1-2: 112-117. doi:10.1016/j.jneuroim.2008.11.001


Author Yan, Jun
Greer, Judith M.
Etherington, Kellie
Cadigan, Greg P.
Cavanagh, Helen
Henderson, Robert D.
O'Sullivan, John D.
Pandian, Jeyaraj D.
Read, Stephen J.
McCombe, Pamela A.
Title Immune activation in the peripheral blood of patients with acute ischemic stroke
Journal name Journal of Neuroimmunology   Check publisher's open access policy
ISSN 0165-5728
Publication date 2009-01
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jneuroim.2008.11.001
Volume 206
Issue 1-2
Start page 112
End page 117
Total pages 6
Editor Cedric S. Raine
Place of publication Amsterdam, The Netherlands
Publisher Elseiver BV
Language eng
Subject C1
110704 Cellular Immunology
110903 Central Nervous System
110201 Cardiology (incl. Cardiovascular Diseases)
Abstract Lymphocytes, neutrophils and macrophages are found in the brain in areas of acute ischaemic stroke. There is also evidence of modulation of systemic immune function after stroke, with post-stroke immunosuppression being observed. Because lymphocytes are activated in the peripheral immune compartment, before entry to the target organ, we reasoned that activated lymphocytes would be present in the circulation, prior to entering the brain, in patients after stroke. Because immune responses are controlled by regulatory mechanisms, we also reasoned that the post-stroke immunosuppression would involve T regulatory cells. The aim of the study was to look for evidence of immune activation and alterations in regulatory T cells in the peripheral blood of patients after acute ischaemic stroke, in comparison to age-matched healthy controls and patients with other neurological diseases (OND), and to determine the phenotype of the activated cells. The percentages of total and activated T cells, B cells, monocyte/ macrophages, and NK/NK-T cells were determined by labelling peripheral blood leukocytes with specific cell surface markers and analysis with 4-colour flow cytometry. The percentages of activated T cells and regulatory T cells were significantly increased in patients with ischemic stroke compared to healthy subjects and patients with OND. There was also an increase in the percentage of CCR7+ T cells. There were no significant differences in the activation of other cell types. In conclusion, there is evidence of immune activation and Treg cells in acute ischaemic stroke.
Keyword Acute ischaemic stroke
T Lymphocytes
Regulatory T cells
CCR7
Memory T cells
Protective Immunity
Q-Index Code C1
Q-Index Status Provisional Code
Additional Notes Available online 5 December 2008.

Document type: Journal Article
Sub-type: Article (original research)
Collection: UQ Centre for Clinical Research Publications
 
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Created: Thu, 03 Sep 2009, 08:49:50 EST by Mr Andrew Martlew on behalf of UQ Centre for Clinical Research