Tongxinluo promotes axonal plasticity and functional recovery after stroke

作者：Xiaoting Wang, Xiaoqin Huang, Mengqi Yang, Xueying Pan, Meiyi Duan, Hui Cai, Guimiao Jiang, Xianlong Wen, Donghua Zou, Li Chen · 发表于：Translational Neuroscience · 年份：2020 · DOI：10.1515/tnsci-2020-0127 · 被引用次数：4 · 研究领域：Lipid metabolism and disorders、Genetic Neurodegenerative Diseases、Regulation of Appetite and Obesity

BACKGROUND: The aim of this study was to investigate the neural plasticity in contralesional cortex and the effects of tongxinluo (TXL) in cerebral ischemic rats. METHODOLOGY: We used stroke-prone renovascular hypertensive (RHRSP) cerebral ischemia rat models to study the effect of TXL and the underlying mechanisms. We performed foot-fault and beam-walking tests to evaluate the motor function of rats after cortical infarction. Biotinylated dextran amine (BDA) was used to track axonal sprouting and neural connections. RESULTS: TXL enhanced the recovery of motor function in cerebral infarction rats. TXL increased axonal sprouting in the peri-infarcted area but not in the corpus callosum, indicating in situ origination instead of crossing between cortical hemispheres through the corpus callosum. TXL promoted the sprouting of corticospinal axons into the denervated side of spinal gray matter. The synaptophysin (SYN)-positive intensity in the peri-infarcted area of TXL-treated group was greater than that in the vehicle group. We observed co-localization of SYN with BDA-positive fibers in the denervated spinal cord gray matter in the TXL group, suggesting that axonal remodeling and synaptic connections were promoted by TXL. CONCLUSION: TXL may promote the recovery of neurological function by promoting the axonal remodeling and synapse formation of motor neuronal fibers after focal cortical infarction in hypertensive rats.