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Gene-Stem Cell Therapy for Ischemic Stroke Koji Abe 1 1Department of Neurology,Graduate School of Medicine and Dentistry,Okayama University Keyword: stroke , cerebral infarction , gene therapy , regenerative medicine pp.1043-1049
Published Date 2009/9/1
DOI https://doi.org/10.11477/mf.1416100554
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Abstract

 Besides blood flow restoration, neuroprotection is essential for treating strokes at an acute stage. Both neurotrophic factors (NTFs) and free radical scavengers can act as neuroprotective agents with abilities to inhibit cell death and facilitate cell survival under cerebral ischemia. For example, topical application of glial cell line-derived neurotrophic factor (GDNF) remarkably reduced infarct size and brain edema after middle cerebral artery (MCA) occlusion in rats. Reduction in the infarct size was not found to be related to a change in the cerebral blood flow (CBF), but was accompanied by marked reduction in BrdU-positive cells in the affected area after TdT-mediated dUTP-biotin nick end labeling (TUNEL) for caspses. Thus, GDNF elicited a direct protective effect against ischemic brain damage, but without improving CBF. Sendai virus vectors harboring the GDNF gene led to a remarkable reduction in infract volume without affecting regional CBF but reduced the translocation of apoptosis inducible factor (AIF) from the mitochondria to cytoplasm.

 Regenerative therapy involving neural stem cells which are intrinsically activated or exogenously transplanted,is an important treatment strategy. To facilitate stem cell migration,an artificial scaffold can be implanted into the injured brain for promoting ischemic brain repair. Addition of NTFs greatly enhanced an intrinsic migration or invasion of stem cells into the scaffold: this strategy could be used in the future for enhancing regenerative potential of brain cells after chronic ischemia-induced brain damage.


Copyright © 2009, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1344-8129 印刷版ISSN 1881-6096 医学書院

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