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(Stroke. 2007;38:2165.)
© 2007 American Heart Association, Inc.
Original Contributions |
From the Department of Neurology (W.-R.S.), University of Münster, Germany; the Department of Neurology (T.S., S.S.), University of Erlangen, Germany; the Department of Neuropathology (C.S.), University of Mainz, Germany; Sygnis Pharma (A.S.), Heidelberg, Germany; and the Institute for Neuroscience and Physiology (C.M.C.-K., H.G.K.), Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden.
Correspondence to W.-R. Schäbitz, Neurologische Klinik, Universitätsklinikum Münster, Albert-Schweitzer-Strasse 33, 48149 Münster, Germany. E-mail schabitz{at}uni-muenster.de
Background and Purpose The discovery of spontaneous neuronal replacement in the adult brain has shifted experimental stroke therapies toward a combined approach of preventing neuronal cell death and inducing neuronal plasticity. Brain-derived neurotrophic factor (BDNF) was shown to induce antiapoptotic mechanisms after stroke and to reduce infarct size and secondary neuronal cell death. Moreover, in intact animals, BDNF is a potent stimulator of adult neurogenesis.
Methods The current study analyzed the effects of BDNF on induction of neuronal progenitor cell migration and sensorimotor recovery after cortical photothrombotic stroke.
Results Daily intravenous bolus applications of BDNF during the first 5 days after stroke resulted in significantly improved sensorimotor scores up to 6 weeks. At the structural level, BDNF significantly increased neurogenesis in the dentate gyrus and enhanced migration of subventricular zone progenitor cells to the nearby striatum of the ischemic hemisphere. BDNF treatment could not, however, further stimulate progenitor cell recruitment to the cortex.
Conclusions These findings consolidate the role of BDNF as a modulator of neurogenesis in the brain and as an enhancer of long-term functional neurological outcome after cerebral ischemia.
Key Words: animal models brain recovery, experimental growth factors neural stem cells neuroregeneration
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