有哪些信誉好的足球投注网站wnt signaling enhances neurogenesis and improves neurological function after focal ischemic injurywnt信号增强了神经,改善局灶性脑缺血损伤后的神经功能.pdfVIP
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wnt signaling enhances neurogenesis and improves neurological function after focal ischemic injurywnt信号增强了神经,改善局灶性脑缺血损伤后的神经功能
Wnt Signaling Enhances Neurogenesis and Improves Neurological Function after Focal Ischemic Injury Adi Shruster*, Tali Ben-Zur, Eldad Melamed, Daniel Offen Laboratory of Neuroscience, Felsenstein Medical Research Center, Sackler Faculty of Medicine, Tel Aviv University, Israel Abstract Stroke potently stimulates cell proliferation in the subventricular zone of the lateral ventricles with subsequent neuroblast migration to the injured striatum and cortex. However, most of the cells do not survive and mature. Extracellular Wnt proteins promote adult neurogenesis in the neurogenic niches. The aim of the study was to examine the efficacy of Wnt signaling on neurogenesis and functional outcome after focal ischemic injury. Lentivirus expressing Wnt3a-HA (LV-Wnt3a- HA) or GFP (LV-GFP) was injected into the striatum or subventricular zone of mice. Five days later, focal ischemic injury was induced by injection of the vasoconstrictor endothelin-1 into the striatum of the same hemisphere. Treatment with LV- Wnt3a-HA into the striatum significantly enhanced functional recovery after ischemic injury and increased the number of BrdU-positive cells that differentiated into mature neurons in the ischemic striatum by day 28. Treatment with LV-Wnt3a-HA into the subventricular zone significantly enhanced functional recovery from the second day after injury and increased the number of immature neurons in the striatum and subventricular zone. This was accompanied by reduced dissemination of the neuronal injury. Our data indicate that Wnt signaling appears to contribute to functional recovery after ischemic injury by increasing neurogenesis or neuronal survival in the striatum. Citation: Shruster A, Ben-Zur T, Melamed E, Offen D (2012) Wnt Signaling Enhances Neurogenesis and Improves Neurological Function after Focal Ischemic Injury. PLoS ONE 7(7): e40843
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