Objective: To explore cell death and apoptosis in rat hippocampal neurons at different time points after ischemia, hypoxia and reperfusion injury and to elucidate time window characteristics in ischemia neuronal injur...Objective: To explore cell death and apoptosis in rat hippocampal neurons at different time points after ischemia, hypoxia and reperfusion injury and to elucidate time window characteristics in ischemia neuronal injury. Methods: Hippocampal neurons were obtained from rat embryo and were cultured in vitro. The ischemia and reperfusion of cultured rat hippocampal neurons were simulated by oxygen-glucose deprivation (OGD) and recovery. OGD at different time points ((0.25) h to (3.0) h) and then the same recovery (24 h) were prepared. Annexin (V-PI) staining and flow cytometry examined neuron death and apoptosis at different time after injury. Results: After OGD and recovery, both necrosis and apoptosis were observed. At different times after OGD, there were statistically significant differences in neuron necrosis rate (P<(0.05)), but not in apoptosis rate (P>(0.05)). At recovery, survival rate of hippocampal neurons further decreased while apoptosis rate increased. Furthermore, apoptosis rates of different time differed greatly (P<(0.05)). Apoptosis rate gradually increased with significant difference among those of different time points (P<(0.05)). However, 2 h after ischemia, apoptosis rate decreased markedly. Conclusions: Apoptosis is an important pathway of delayed neuron death. The therapeutic time window should be within 2 h after cerebral ischemia and hypoxia.展开更多
目的探讨早期血压变异性与急性缺血性卒中患者早期神经功能恶化(early neurological deterioration, END)的相关性。方法前瞻性收集住院治疗的急性缺血性卒中患者。连续记录入组患者入院72 h内的血压值,计算收缩压(systolic blood p...目的探讨早期血压变异性与急性缺血性卒中患者早期神经功能恶化(early neurological deterioration, END)的相关性。方法前瞻性收集住院治疗的急性缺血性卒中患者。连续记录入组患者入院72 h内的血压值,计算收缩压(systolic blood pressure, SBP)和舒张压(diastolic blood pressure, DBP)的平均值(mean)、最大值(maximum, max)、极差(differences between the maximum and minimum, max-min)、标准差(standard deviation, SD)和变异系数(coefficient of variation, CV)。END定义为美国国立卫生研究院卒中量表(National Institute of Health Stroke Scale, NIHSS)最高时的评分较基线增加≥2分。采用多变量logistic回归分析在校正混杂因素后确定不同血压变异性参数与急性缺血性卒中后END的独立相关性。结果共纳入128例急性缺血性卒中患者,其中男性75例,女性53例;平均年龄(63.30±11.82)岁。经过标准治疗,35例(27.34%)患者在入院72 h内发生END。END患者与非END患者年龄、性别、糖尿病、基线NIHSS评分、C反应蛋白以及SBPmax、SBPmax-min、SBPSD、SBPCV、DBPmax、DBPmax-min、DBPSD和DBPCV的差异有统计学意义(P〈0.05)。多变量logistic回归分析表明,血压变异性指标中的SBPmax-min[优势比(odds ratio, OR)1.040,95%可信区间(confidence interval, CI)1.014~1.067]、SBPSD(OR 1.191,95% CI 1.052~1.347)、SBPCV(OR 1.317,95% CI 1.100~1.578)、DBPmax-min(OR 1.076,95% CI 1.018~1.138)、DBPSD(OR 1.508,95% CI 1.128~2.016)和DBPCV(OR 1.338,95% CI 1.093~1.638)是急性缺血性卒中患者发生END的独立危险因素。结论急性缺血性卒中患者72 h内血压变异性与END显著相关。展开更多
文摘目的分析不同时间窗静脉溶栓对急性缺血性脑卒中患者临床疗效、血管再通和神经功能的影响。方法选取2017年3月—2019年3月本院收治的急性缺血性脑卒中患者120例,按照静脉溶栓时间窗分为A组和B组各60例。A组静脉溶栓时间控制在4.5 h内,B组静脉溶栓时间控制在4.5~12.0 h。比较2组临床疗效和治疗后血管狭窄、血管再通及继发出血情况,以及治疗前后神经功能缺损程度[美国国立卫生研究院卒中量表(national institutes of health stroke scale,NIHSS)]、日常生活能力(改良Rankin量表)、生活质量[Barthel指数(Barthel index,BI)量表]。结果治疗后A组临床总有效率显著高于B组(P<0.05);治疗后2组NIHSS评分均得到改善,而治疗1周后及治疗3个月后A组NIHSS评分均低于B组,差异有统计学意义(P<0.05或P<0.01);治疗后2组改良Rankin量表评分均降低,BI评分均升高,且A组改良Rankin量表评分降低及BI评分升高程度均大于B组,差异有统计学意义(P<0.05或P<0.01);2组血管狭窄、血管再通及继发出血率比较差异无统计学意义(P>0.05)。结论急性缺血性脑卒中患者需早期开展静脉溶栓治疗,时间窗控制在4.5 h内可提高临床疗效、促进患者神经功能恢复,且预后佳。
文摘Objective: To explore cell death and apoptosis in rat hippocampal neurons at different time points after ischemia, hypoxia and reperfusion injury and to elucidate time window characteristics in ischemia neuronal injury. Methods: Hippocampal neurons were obtained from rat embryo and were cultured in vitro. The ischemia and reperfusion of cultured rat hippocampal neurons were simulated by oxygen-glucose deprivation (OGD) and recovery. OGD at different time points ((0.25) h to (3.0) h) and then the same recovery (24 h) were prepared. Annexin (V-PI) staining and flow cytometry examined neuron death and apoptosis at different time after injury. Results: After OGD and recovery, both necrosis and apoptosis were observed. At different times after OGD, there were statistically significant differences in neuron necrosis rate (P<(0.05)), but not in apoptosis rate (P>(0.05)). At recovery, survival rate of hippocampal neurons further decreased while apoptosis rate increased. Furthermore, apoptosis rates of different time differed greatly (P<(0.05)). Apoptosis rate gradually increased with significant difference among those of different time points (P<(0.05)). However, 2 h after ischemia, apoptosis rate decreased markedly. Conclusions: Apoptosis is an important pathway of delayed neuron death. The therapeutic time window should be within 2 h after cerebral ischemia and hypoxia.
文摘目的:探讨短暂性脑缺血发作(transient ischaemic attack, TIA)患者发作次数和持续时间与早期缺血性卒中风险的相关性。方法回顾性纳入2013年1月至2017年7月在六安市人民医院神经内科住院的TIA患者,根据首次发生TIA后72 h内头颅CT或MRI复查结果分为无卒中组和卒中组,比较两组患者人口统计学和临床资料。结果共纳入171例TIA患者,其中卒中组54例,无卒中组117例。两组性别、心房颤动、发病前使用抗凝药、基线血压(收缩压和舒张压)、低密度脂蛋白胆固醇、高密度脂蛋白胆固醇、空腹血糖、TIA病因学(心源性栓塞)、TIA发作频率(≥2次)、TIA症状持续时间、ABCD2评分(6分和7分)以及发病后使用抗高血压药存在显著性差异。多变量logistic回归分析显示,高舒张压[优势比(odds ratio, OR)1.121,95%可信区间(confidence interval, CI)1.016~1.238;P=0.023]、高空腹血糖(OR 10.866,95% CI 3.658~30.945;P=0.001)、ABCD2评分为6分(OR 4.221,95% CI 1.906~9.352;P〈0.001)和7分(OR 4.207,95% CI 2.040~9.961;P〈0.001)、TIA症状持续时间≥60 min(OR 3.682,95% CI 1.961~9.989;P〈0.001)和TIA发作≥2次(OR 4.220,95% CI 1.953~9.118;P〈0.001)为早期发生缺血性卒中的独立危险因素,而发病前使用抗凝药为独立保护因素(OR 0.300,95% CI 0.097~0.923;P=0.036)。
结论症状发作次数≥2次和症状持续时间≥60 min的TIA患者早期更易发生缺血性卒中。
文摘目的探讨脑动脉粥样硬化狭窄分布与急性大动脉粥样硬化性卒中患者早期神经功能恶化(early neurologic deterioration,END)的相关性。方法回顾性纳入2017年3月至2018年5月在安徽医科大学第二附属医院神经内科住院的急性大动脉粥样硬化性卒中患者,END定义为入院72 h内美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale,NIHSS)评分较基线时增加2分,或NIHSS意识水平评分增加1分,或NIHSS运动评分增加1分,或出现任何新发神经功能缺损。患者根据是否发生END分为END组和非END组,根据头颈部CT血管造影、磁共振血管造影或数字减影血管造影确定的脑动脉狭窄情况(狭窄程度>50%)分为单支动脉狭窄组和多支动脉狭窄组。应用多变量logistic回归分析确定END的独立危险因素。结果总共纳入371例患者,其中92例(24.8%)发生END。在单支血管狭窄组中,END发生率因血管狭窄分布而异:大脑前动脉(2.3%)、大脑中动脉(54.4%)、大脑后动脉(9.1%)、基底动脉(4.5%)、颈内动脉颅内段(11.4%)、椎动脉颅内段(6.8%)、颈内动脉颅外段(6.8%)、椎动脉颅外段(4.5%)。END组大脑中动脉狭窄发生率显著高于非END组(54.5%对21.2%;χ^2=17.615,P<0.001)。在多支血管狭窄组中,单纯颅内血管狭窄患者END发生率最高(66.7%),其次为颅内外血管狭窄患者(29.2%),单纯颅外血管狭窄患者最少(4.2%)。END组单纯颅内多支动脉狭窄发生率显著高于非END组(66.7%对47.6%;χ^2=5.262,P=0.022)。多变量logistic回归分析显示,大脑中动脉狭窄(优势比1.805,95%可信区间1.217~2.676;P=0.003)是发生END的独立危险因素。结论急性大动脉粥样硬化性卒中患者的END与脑动脉粥样硬化狭窄分布有关,大脑中动脉狭窄是END的独立危险因素。
文摘目的探讨大动脉狭窄与大脑中动脉供血区梗死患者早期神经功能恶化(early neurological deterioration,END)的相关性。方法回顾性收集大脑中动脉供血区脑梗死患者,END定义为人院72h内美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale,NIHSS)评分较基线值增加〉12分。利用颅脑血管成像对大脑中动脉和颈内动脉进行评价,狭窄程度分为无或轻度(〈50%)、中度(50%~70%)、重度(71%~99%)和闭塞(100%)。比较END组与非END组的临床危险因素、神经功能缺损程度、病灶大小以及主干动脉病变情况。结果共纳入256例大脑中动脉供血区梗死患者,其中70例(27.34%)患者发生END。END阳性组年龄(P=0.045)、梗死体积(P=0.045)、基线NIHSS评分(P=0.007)以及主干动脉狭窄程度(P=0.038)均显著高于或大于END阴性组。多变量logistic回归分析显示,基线NIHSS评分较高[优势比(odds ratio,OR)1.071,95%可信区间(confidence interval,CI)1.004~1.142;P=0.037]、梗死灶直径〉20mm(OR2.077,95%CI1.077~3.736;P=0.028)以及主干动脉重度狭窄(OR2.521,95%CI1.079~5.886;P=0.033)或闭塞(OR3.074,95%CI1.262~7.489;P=0.013)是END的独立预测因素。结论主干动脉重度狭窄或闭塞病变可能是急性大脑中动脉供血区梗死患者发生END的独立预测因素。
文摘目的探讨急性缺血性卒中患者静脉溶栓后早期神经功能恶化(early neurological deterioration,END)的预测因素及其对短期转归的影响。方法回顾性纳入2017年1月至2019年4月在徐州医科大学第二附属医院接受静脉溶栓治疗的急性缺血性卒中患者。END定义为入院7 d内美国国立卫生研究院卒中量表(National Institutes of Health Stroke Scale,NIHSS)评分较基线时增加≥2分。出院时应用改良Rankin量表评价短期转归,0~2分定义为转归良好,3~6分定义为转归不良。运用多变量logistic回归分析确定END的独立预测因素及其与短期转归的相关性。结果共纳入199例接受静脉溶栓治疗的急性缺血性卒中患者。中位年龄68岁(四分位数间距:62~76岁),女性69例(34.7%),基线中位NIHSS评分6分(四分位数间距:3~12分)。35例(17.6%)患者发生END,症状进展主要发生在入院后2 d内(31例,88.6%),大多数END病因为缺血进展或再发(28例,80.0%)。单变量分析显示空腹血糖、有症状颅内出血与END相关(P均<0.05),但多变量logistic回归分析并未发现END的独立预测因素。排除12例短期转归资料缺失的患者,共187例纳入短期转归分析。其中,转归良好组110例,转归不良组77例。单变量分析显示,缺血性心脏病、心房颤动、轻度卒中、病因学分型、基线NIHSS评分、淋巴细胞计数、空腹血糖、中性粒细胞/淋巴细胞比值、血管内治疗以及END与短期转归相关(P均<0.05)。多变量logistic回归分析提示,高基线NIHSS评分(优势比1.350,95%可信区间1.182~1.541;P<0.001)和END(优势比32.540,95%可信区间6.149~172.21;P<0.001)为短期转归不良的独立危险因素。结论急性缺血性卒中静脉溶栓治疗后仍有部分患者发生END,而且END是患者短期转归不良的独立危险因素。
文摘目的探讨早期血压变异性与急性缺血性卒中患者早期神经功能恶化(early neurological deterioration, END)的相关性。方法前瞻性收集住院治疗的急性缺血性卒中患者。连续记录入组患者入院72 h内的血压值,计算收缩压(systolic blood pressure, SBP)和舒张压(diastolic blood pressure, DBP)的平均值(mean)、最大值(maximum, max)、极差(differences between the maximum and minimum, max-min)、标准差(standard deviation, SD)和变异系数(coefficient of variation, CV)。END定义为美国国立卫生研究院卒中量表(National Institute of Health Stroke Scale, NIHSS)最高时的评分较基线增加≥2分。采用多变量logistic回归分析在校正混杂因素后确定不同血压变异性参数与急性缺血性卒中后END的独立相关性。结果共纳入128例急性缺血性卒中患者,其中男性75例,女性53例;平均年龄(63.30±11.82)岁。经过标准治疗,35例(27.34%)患者在入院72 h内发生END。END患者与非END患者年龄、性别、糖尿病、基线NIHSS评分、C反应蛋白以及SBPmax、SBPmax-min、SBPSD、SBPCV、DBPmax、DBPmax-min、DBPSD和DBPCV的差异有统计学意义(P〈0.05)。多变量logistic回归分析表明,血压变异性指标中的SBPmax-min[优势比(odds ratio, OR)1.040,95%可信区间(confidence interval, CI)1.014~1.067]、SBPSD(OR 1.191,95% CI 1.052~1.347)、SBPCV(OR 1.317,95% CI 1.100~1.578)、DBPmax-min(OR 1.076,95% CI 1.018~1.138)、DBPSD(OR 1.508,95% CI 1.128~2.016)和DBPCV(OR 1.338,95% CI 1.093~1.638)是急性缺血性卒中患者发生END的独立危险因素。结论急性缺血性卒中患者72 h内血压变异性与END显著相关。