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• W2768862246 abstract "Background The neuroprotective effects of kallidinogenase against acute cerebral infarction have been demonstrated, and the use of microbubbles has been suggested as a therapeutic mechanism for drug delivery. This study was designed to investigate the optimal parameters for preparing kallidinogenase-loaded microbubbles (KLMs) and to evaluate the effects of KLM-targeted therapy on neurogenesis and angiogenesis following experimental acute cerebral infarction in rats. Materials and Methods KLMs were prepared by mechanical shaking. Male Wistar rats were randomly divided into an ultrasound-mediated KLM-treated group and 4 control groups. Treatments were administered via daily tail vein injection on 6 consecutive days, starting at 24 hours after middle cerebral artery occlusion (MCAO). The ultrasound-treated groups were subjected to a 2-MHz pulse of ultrasonic irradiation on the lateral skull of the ischemic side for 10 minutes during injection. Cell proliferation was examined using a 5-bromo-2-deoxyuridine assay. Infarct volume and neurological function were evaluated on days 3 and 7 after MCAO. Results The ultrasound-mediated KLM and kallidinogenase treatments significantly increased the numbers of doublecortin-immunoreactive cells in the subventricular zone (SVZ) and laminin+ cells in the peri-infarction region on day 7 after MCAO, compared with the other 3 groups (all P < .05). The neurological function scores of the ultrasound-mediated KLM-treated group were significantly better than those of rats treated with kallidinogenase alone or with the other treatments (all P < .05). Conclusions Treatment with the ultrasound-mediated KLMs promoted the proliferation of SVZ neuroblasts and vascular regeneration, which contributed to functional improvement after stroke. These findings provide a novel therapy for ischemic stroke. The neuroprotective effects of kallidinogenase against acute cerebral infarction have been demonstrated, and the use of microbubbles has been suggested as a therapeutic mechanism for drug delivery. This study was designed to investigate the optimal parameters for preparing kallidinogenase-loaded microbubbles (KLMs) and to evaluate the effects of KLM-targeted therapy on neurogenesis and angiogenesis following experimental acute cerebral infarction in rats. KLMs were prepared by mechanical shaking. Male Wistar rats were randomly divided into an ultrasound-mediated KLM-treated group and 4 control groups. Treatments were administered via daily tail vein injection on 6 consecutive days, starting at 24 hours after middle cerebral artery occlusion (MCAO). The ultrasound-treated groups were subjected to a 2-MHz pulse of ultrasonic irradiation on the lateral skull of the ischemic side for 10 minutes during injection. Cell proliferation was examined using a 5-bromo-2-deoxyuridine assay. Infarct volume and neurological function were evaluated on days 3 and 7 after MCAO. The ultrasound-mediated KLM and kallidinogenase treatments significantly increased the numbers of doublecortin-immunoreactive cells in the subventricular zone (SVZ) and laminin+ cells in the peri-infarction region on day 7 after MCAO, compared with the other 3 groups (all P < .05). The neurological function scores of the ultrasound-mediated KLM-treated group were significantly better than those of rats treated with kallidinogenase alone or with the other treatments (all P < .05). Treatment with the ultrasound-mediated KLMs promoted the proliferation of SVZ neuroblasts and vascular regeneration, which contributed to functional improvement after stroke. These findings provide a novel therapy for ischemic stroke." @default.
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• W2768862246 date "2018-03-01" @default.
• W2768862246 modified "2023-09-28" @default.
• W2768862246 title "Ultrasound-Mediated Kallidinogenase-Loaded Microbubble Targeted Therapy for Acute Cerebral Infarction" @default.
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• W2768862246 doi "https://doi.org/10.1016/j.jstrokecerebrovasdis.2017.09.063" @default.
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