摘要
背景:牛磺熊去氧胆酸是一种亲水性胆汁酸衍生物,在多种神经系统疾病模型中均有神经保护作用,但目前鲜有报道研究牛磺熊去氧胆酸对脊髓损伤的作用。目的:观察缺糖缺氧条件下牛磺熊去氧胆酸对脊髓神经元凋亡的作用,以及对脊髓损伤后小鼠运动功能恢复的影响。方法:①体外实验:从孕13.5 d的C57 BL/6小鼠胚胎中分离提取原代脊髓神经元,培养72 h后,分3组处理:正常组加入Neurobasal完全培养基,置于CO_(2)培养箱(体积分数5%CO_(2)+95%空气)内培养24 h;氧糖剥夺组加入无糖的Neurobasal培养基,置于三气培养箱(体积分数94%N2+5%CO_(2)+1%O_(2))培养12 h,更换为Neurobasal完全培养基后置于CO_(2)培养箱内培养12 h;实验组处理过程大致同氧糖剥夺组,其中在加入无糖Neurobasal培养基的同时加入牛磺熊去氧胆酸。采用TUNEL染色检测细胞凋亡,CCK-8法检测细胞活性,免疫荧光染色检测细胞βⅢ微管蛋白表达。②动物实验:采用随机数字表法将60只C57 BL/6小鼠分为假手术组、脊髓损伤组与实验组,每组20只,脊髓损伤组与实验组采用Allen打击法建立T_(9)-T_(10)脊髓损伤模型,造模后第1天开始,实验组灌胃给予牛磺熊去氧胆酸溶液,假手术组与脊髓损伤组灌胃给予生理盐水,1次/d。连续给药14 d后,采用行为学和组织学方法评估脊髓组织修复情况。结果与结论:①体外实验:TUNEL染色、CCK-8与免疫荧光染色检测显示,氧糖剥夺组细胞凋亡数量高于正常组(P<0.01),细胞活性与βⅢ微管蛋白表达低于正常组(P<0.01);实验组细胞凋亡数量低于氧糖剥夺组(P<0.01),细胞活性与βⅢ微管蛋白表达高于氧糖剥夺组(P<0.01)。②动物实验:旷场实验BBB评分与后肢足迹实验显示,实验组小鼠行走与运动功能恢复程度好于脊髓损伤组。苏木精-伊红染色显示,脊髓损伤组小鼠脊髓损伤部位可见明显畸形和空洞,神经细胞数量明显减少;与脊髓
BACKGROUND:Tauroursodeoxycholic acid is a hydrophilic bile acid derivative that has neuroprotective effects in a variety of neurological disease models.However,there are few reports on the effects of tauroursodeoxycholic acid on spinal cord injury.OBJECTIVE:To investigate the effect of tauroursodeoxycholic acid on apoptosis of spinal cord neurons under hypoglycemic and hypoxic conditions,as well as the effect on recovery of motor function in mice after spinal cord injury.METHODS:(1)In vitro experiment:Primary spinal cord neurons were isolated from C57 BL/6 mouse embryos at 13.5 days of gestation.After 72 hours of culture,the cells were divided into three groups.In the normal group,cells were cultured in Neurobasal complete medium that was incubated in a CO_(2)incubator(5%CO_(2)+95%air)for 24 hours.In the oxyglucose-deprived group,sugar-free Neurobasal medium was added and incubated in a triple-gas incubator(94%N2+5%CO_(2)+1%O_(2))for 12 hours,and then the medium was replaced with Neurobasal complete medium and incubated in a CO_(2)incubator for 12 hours.In the experimental group,the treatment procedure was approximately the same as that in the oxyglucose-deprived group,except that taurodeoxycholic acid was added along with the sugar-free Neurobasal medium.TUNEL staining was used to detect apoptosis,cell counting kit-8 assay was applied to detect cell activity,and immunofluorescence staining was performed to detect cellularβ-microtubule protein expression.(2)Animal experiment:Sixty C57 BL/6 mice were randomly divided into sham-operated group,spinal cord injury group and experimental group,with 20 mice in each group.Animal models of T_(9)-T_(10)spinal cord injury were established using Allen’s percussion method in the spinal cord injury group and the experimental group.Starting from the 1st day after modeling,taurodeoxycholic acid solution was given by gavage in the experimental group and normal saline was given by gavage in the sham-operated and spinal cord injury groups once a day for 14 consecutive days.Spina
作者
陈泽鹏
侯永辉
陈树东
侯宇
林定坤
Chen Zepeng;Hou Yonghui;Chen Shudong;Hou Yu;Lin Dingkun(The Second Clinical Medical College,Guangzhou University of Chinese Medicine,Guangzhou 510405,Guangdong Province,China;Lingnan Medical Research Center,Guangzhou University of Chinese Medicine,Guangzhou 510405,Guangdong Province,China;Department of Spinal Surgery,Guangdong Provincial Hospital of Chinese Medicine,Guangzhou 510120,Guangdong Province,China)
出处
《中国组织工程研究》
CAS
北大核心
2024年第4期528-534,共7页
Chinese Journal of Tissue Engineering Research
基金
国家自然科学基金项目(82074451),项目负责人:林定坤
广东省自然科学基金项目(2019A1515010323),项目负责人:林定坤
广州市科技计划项目(2023A03J0239),项目负责人:侯永辉
广州市科技计划项目(202102020542),项目负责人:陈树东。
关键词
牛磺熊去氧胆酸
脊髓损伤
缺糖缺氧
脊髓神经元
行为学
细胞凋亡
tauroursodeoxycholic acid
spinal cord injury
glucose/oxygen deprivation
spinal cord neuron
behavioristics
cell apoptosis
