Environmental enrichment combined with fasudil promotes motor function recovery and axonal regeneration after stroke  

作　　者：Yi-Tong Zhu Qun Zhang Hong-Yu Xie Ke-Wei Yu Gao-Jing Xu Si-Yue Li Yi Wu 

机构地区：[1]Department of Rehabilitation Medicine,Huashan Hospital,Fudan University,Shanghai,China

出　　处：《Neural Regeneration Research》2021年第12期2512-2520,共9页中国神经再生研究（英文版）

基　　金：This study was supported by the National Natural Science Foundation of China,Nos.81672242(to YW),81972141(to YW);Shanghai Sailing Program,No.20YF1403500(to QZ);and Shanghai Municipal Key Clinical Specialty of China,No.shslczdzk02702(to YW).

摘　　要：Fasudil,a Rho-associated protein kinase(ROCK)inhibitor,has a protective effect on the central nervous system.In addition,environmental enrichment is a promising technique for inducing the recovery of motor impairments in ischemic stroke models.The present study aimed to explore whether environmental enrichment combined with fasudil can facilitate motor function recovery and induce cortical axonal regeneration after stroke.First,a mouse model of ischemic cerebral stroke was established by photochemical embolization of the left sensorimotor cortex.Fasudil solution(10 mg/kg per day)was injected intraperitoneally for 21 days after the photothrombotic stroke.An environmental enrichment intervention was performed on days 7-21 after the photothrombotic stroke.The results revealed that environmental enrichment combined with fasudil improved motor function,increased growth-associated protein 43 expression in the infarcted cerebral cortex,promoted axonal regeneration on the contralateral side,and downregulated ROCK,p-LIM domain kinase(LIMK)1,and p-cofilin expression.The combined intervention was superior to monotherapy.These findings suggest that environmental enrichment combined with fasudil treatment promotes motor recovery after stroke,at least partly by stimulating axonal regeneration.The underlying mechanism might involve ROCK/LIMK1/cofilin pathway regulation.This study was approved by the Institutional Animal Care and Use Committee of Fudan University,China(approval No.20160858A232)on February 24,2016.

关 键 词：axon regeneration biotinylated dextran amines environmental enrichment FASUDIL growth-associated protein 43 ischemic stroke motor recovery Nissl bodies Rho/ROCK pathway 

分 类 号：R454[医药卫生—治疗学] R453[医药卫生—临床医学]