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Chen Y, Bodhankar S, Murphy SJ, Vandenbark AA, Alkayed NJ, Offner H. Intrastriatal B-cell administration limits infarct size after stroke in B-cell deficient mice. Metab Brain Dis 2012; 27:487-93. [PMID: 22618587 PMCID: PMC3427715 DOI: 10.1007/s11011-012-9317-7] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 05/08/2012] [Indexed: 02/02/2023]
Abstract
Recent evidence emphasizes B-cells as a major regulatory cell type that plays an important role in limiting the pathogenic effects of ischemic stroke. The aim of the current study was to extend this initial observation to specifically examine the infiltration of regulatory B-cells and to determine if the effect of B-cells to limit the inflammatory response to cerebral ischemia is mediated by their action centrally or peripherally. Our data demonstrate the increased presence of a regulatory B-cell subset in the affected hemisphere of wild-type mice after middle cerebral artery occlusion (MCAO). We further explored the use of a novel method of stereotaxic cell delivery to bypass the blood brain barrier (BBB) and introduce CD19(+) B-cells directly into the striatum as compared to peripheral administration of B-cells. Infarct volumes after 60 minutes of MCAO and 48 hours of reperfusion were determined in B-cell deficient μMT( -/- ) mice with and without replacement of either B-cells or medium. Infarct size was significantly decreased in cerebral cortex after intrastriatal transfer of 100,000 B-cells to μMT(-/-) mice vs. controls, with a comparable effect on infarct size as obtained by 50 million B-cells transferred intraperitoneally. These findings support the hypothesis that B-cells play a protective role against ischemic brain injury, and suggest that B-cells may serve as a novel therapeutic agent for modulating the immune response in central nervous system inflammation after stroke.
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Affiliation(s)
- Yingxin Chen
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Sheetal Bodhankar
- Neuroimmunology Research, R&D31, Portland VA Medical Center, Portland, OR, USA
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
| | - Stephanie J. Murphy
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Arthur A. Vandenbark
- Neuroimmunology Research, R&D31, Portland VA Medical Center, Portland, OR, USA
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
- Sr. Research Career Scientist, Research Service, Department of Veterans Affairs Medical Center, Portland, OR 97239, USA
- Department of Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, OR, USA
| | - Nabil J. Alkayed
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Halina Offner
- Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, OR, USA
- Neuroimmunology Research, R&D31, Portland VA Medical Center, Portland, OR, USA
- Department of Neurology, Oregon Health & Science University, Portland, OR, USA
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