Abstract
Experimental cerebral ischemic stroke is exacerbated by inflammatory T-cells and is accompanied by systemic increases in CD4+CD25+Foxp3+ regulatory T-cells (Treg). To determine their effect on ischemic brain injury, Treg were depleted in Foxp3DTR mice prior to stroke induction. In contrast to a recent Nature Medicine report, our results demonstrate unequivocally that Treg depletion did not affect stroke infarct volume, thus failing to implicate this regulatory pathway in limiting stroke damage.
References
Dirnagl U, Klehmet J, Braun J, Harms H, Meisel C, Ziemssen T, Prass K, Meisel A (2007) Stroke induced immunodepression, experimental evidence and clinical relevance. Stroke 38:770–773
Kim JM, Rasmussen JP, Rudensky AY (2007) Regulatory T cells prevent catastrophic autoimmunology throughout the lifespan of mice. Nat Immunol 8:191–197
Liesz A, Suri-Payer E, Veltkamp C, Doerr H, Sommer C, Rivest S, Giese T, Veltkamp R (2009) Regulatory T cells are key cerebroprotective immunomodulators in acute experimental stroke. Nat Med 15:192–199
Offner H, Subramanian S, Parker S, Afentoulis M, Vandenbark A, Hurn P (2006a) Experimental stroke induces massive rapid activation of the peripheral immune system. J Cereb Blood Flow Metab 26:654–665
Offner H, Subramanian S, Parker S, Wang C, Afentoulis M, Lewis A, Vandenbark A, Hurn P (2006b) Splenic atrophy in experimental stroke is accompanied by increased regulatory T cells and circulating macrophages. J Immunol 176:6523–6531
Sacco RL, Chong JI, Prabhakaran S, Elkind MS (2007) Experimental treatments for acute ischaemic stroke. Lancet 369:331–341
Sakaguchi S, Ono M, Setoguchi R, Yagi H, Hori S, Fehervari Z, Shimizu J, Takahashi T, Nomura T (2006) Foxp + CD25 + CD4+ natural T cells in dominant self-tolerance and autoimmune disease. Immunol Rev 212:8–27
Acknowledgments
The authors wish to thank Dr. Sushmita Sinha, Ms. Sandhya Subramanian and Dr. Suzan Dziennis for helpful discussions and Ms. Eva Niehaus and Heather Hoem for assistance in preparing the manuscript. This work was supported by NIH grant NR03521 and the Biomedical Laboratory R&D Service, Department of Veterans Affairs.
Conflict of interest
The authors declare that they have no conflict of interest.
Author information
Authors and Affiliations
Corresponding author
Additional information
Xuefang Ren and Kozaburo Akiyoshi contributed equally to this work.
Rights and permissions
About this article
Cite this article
Ren, X., Akiyoshi, K., Vandenbark, A.A. et al. CD4+FoxP3+ regulatory T-cells in cerebral ischemic stroke. Metab Brain Dis 26, 87–90 (2011). https://doi.org/10.1007/s11011-010-9226-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11011-010-9226-6