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Shabanzadeh AP, Tassew NG, Szydlowska K, Tymianski M, Banerjee P, Vigouroux RJ, Eubanks JH, Huang L, Geraerts M, Koeberle PD, Mueller BK, Monnier PP. Uncoupling Neogenin association with lipid rafts promotes neuronal survival and functional recovery after stroke. Cell Death Dis 2015; 6:e1744. [PMID: 25950474 PMCID: PMC4669689 DOI: 10.1038/cddis.2015.109] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 02/24/2015] [Accepted: 03/06/2015] [Indexed: 12/31/2022]
Abstract
The dependence receptor Neogenin and its ligand, the repulsive guidance molecule a (RGMa), regulate apoptosis and axonal growth in the developing and the adult central nervous system (CNS). Here, we show that this pathway has also a critical role in neuronal death following stroke, and that providing RGMa to neurons blocks Neogenin-induced death. Interestingly, the Neogenin pro-death function following ischemic insult depends on Neogenin association with lipid rafts. Thus, a peptide that prevents Neogenin association with lipid rafts increased neuronal survival in several in vitro stroke models. In rats, a pro-survival effect was also observed in a model of ocular ischemia, as well as after middle cerebral artery occlusion (MCAO). Treatments that prevented Neogenin association with lipid rafts improved neuronal survival and the complexity of the neuronal network following occlusion of the middle artery. Toward the development of a treatment for stroke, we developed a human anti-RGMa antibody that also prevents Neogenin association with lipid rafts. We show that this antibody also protected CNS tissue from ischemic damage and that its application resulted in a significant functional improvement even when administrated 6 h after artery occlusion. Thus, our results draw attention to the role of Neogenin and lipid rafts as potential targets following stroke.
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Affiliation(s)
- A P Shabanzadeh
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Anatomy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - N G Tassew
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - K Szydlowska
- Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada
| | - M Tymianski
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada [3] Department of Surgery, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - P Banerjee
- Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada
| | - R J Vigouroux
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - J H Eubanks
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - L Huang
- AbbVie Bioresearch Center, 100 Research Drive, Worcester, MA 01605, USA
| | - M Geraerts
- Neuroscience Research, Research and Development, AbbVie Deutschland GmbH & CO KG, Knollstrasse, D-67061 Ludwigshafen, Germany
| | - P D Koeberle
- 1] Department of Anatomy, Faculty of Medicine, University of Toronto, Toronto, ON, Canada [2] Department of Ophthalmology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - B K Mueller
- Neuroscience Research, Research and Development, AbbVie Deutschland GmbH & CO KG, Knollstrasse, D-67061 Ludwigshafen, Germany
| | - P P Monnier
- 1] Toronto Western Research Institute, Genetics and Development Division, KDT 8-418, 60 Leonard Street, Toronto, M5T 2S8 ON, Canada [2] Department of Physiology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada [3] Department of Ophthalmology, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
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