目的:通过乳酸脱氢酶(lactate dehydrogenase,LDH)的检测,观察解毒通络药物干预后的脑微血管内皮细胞条件培养液(conditioned medium of cerebral microvascular endothelial cells,CMECs-CM)特征及其抗缺血及再灌皮质神经元损伤的效应...目的:通过乳酸脱氢酶(lactate dehydrogenase,LDH)的检测,观察解毒通络药物干预后的脑微血管内皮细胞条件培养液(conditioned medium of cerebral microvascular endothelial cells,CMECs-CM)特征及其抗缺血及再灌皮质神经元损伤的效应,探讨脑微血管内皮细胞(cerebral microvascular endothelial cells,CMECs)调控神经元功能的机制。方法:通络救脑注射液(Tongluo Jiunao Injection,TLJNI)作用于正常、缺血和缺血再灌三种培养状态的大鼠CMECs,分别收集有药物干预及无干预的三对无血清内皮细胞条件培养液,并测定其LDH值。同步原代培养大鼠脑皮质神经元,亦分为正常、缺血、缺血再灌三组,用低(10%)、中(50%)、高(100%)三种浓度的各类CMECs-CM分别作用上述三种培养状态的神经元,测定其LDH漏出率。结果:比较TLJNI干预后的CMECs-CM与无干预的CMECs-CM中LDH漏出值,CMECs缺血组与缺血再灌组经药物干预后均明显降低(P<0.01)。对于缺血神经元,缺血内皮细胞条件培养液(conditioned medium of ischemic CMECs,Is-CM)高浓度(100%)和TLJNI干预后的缺血内皮细胞条件培养液(conditioned medium of ischemic CMECs with drug treatment,IsT-CM)高浓度(100%)作用后表现为增加LDH漏出率(P<0.01),而低浓度10%的IsT-CM则降低LDH漏出率(P<0.05);对于缺血再灌神经元,与对照组比较,各类CMECs-CM作用后均能降低神经元LDH漏出率(P<0.05或P<0.01)。比较每种条件液相邻浓度间的效应差异,均以10%或50%的CM降低损伤为佳,正常内皮细胞条件培养液(conditioned medium of normal CMECs,N-CM)及缺血再灌内皮细胞条件培养液(conditioned medium of ischemic/reperfusional CMECs,Rp-CM)组间差异有统计学意义(P<0.05或P<0.01);对于正常神经元,各类CMECs-CM作用后均增加了神经元LDH漏出率(P<0.05或P<0.01)。比较每种条件液相邻浓度间的效应差异,N-CM组间差异有统计学意义(P<0.05或P<0.01)。结论:TLJNI能够防御CMECs缺血及缺血再灌的损伤,�展开更多
Various stem cells, including neural stem cells （NSCs）, have been extensively studied in stroke models, but how to increase neuronal differentiation rate of NSCs remains unresolved, particu- larly in a damaged envir...Various stem cells, including neural stem cells （NSCs）, have been extensively studied in stroke models, but how to increase neuronal differentiation rate of NSCs remains unresolved, particu- larly in a damaged environment. The purpose of this study was to investigate the effects of cerebral mi- crovascular endothelial cells （CMECs） on the neurogenesis of NSCs with or without oxygen-glucose deprivation （OGD）. The NSCs acquired from primary culture were immunostained to prove cell purity. Survival and proliferation of NSCs were determined after the co-culture with CMECs for 7 days. After removing the CMECs, NSCs were randomly divided into two groups as follows： OGD and non-OGD groups. Both groups were maintained in differentiation culture for 4 days to evaluate the differentiation rate. Mouse embryo fibroblast （MEF） cells co-cultured with NSCs served as control group. NSCs co-cultured with CMECs had an increase in size （on the 7th day： 89.80±26.12 μm vs. 73.08±15.01μm, P〈0.001） （n=12） and number [on the 7th day： 6.33±5.61/high power objective （HP） vs. 2.23±1.61/HP, P〈0.001] （n=12） as compared with those co-cultured with MEF cells. After further differentiation cul- ture for 4 days, NSCs co-cultured with CMECs had an increase in neuronal differentiation rate in OGD and non-OGD groups, but not in the control group （15.16% and 16.07% vs. 8.81%; both P〈0.001） （n=6） This study provided evidence that OGD could not alter the effects of CMECs in promoting the neuronal differentiation potential of NSCs. These findings may have important implications for the development of new cell therapies for cerebral vascular diseases.展开更多
文摘目的:通过乳酸脱氢酶(lactate dehydrogenase,LDH)的检测,观察解毒通络药物干预后的脑微血管内皮细胞条件培养液(conditioned medium of cerebral microvascular endothelial cells,CMECs-CM)特征及其抗缺血及再灌皮质神经元损伤的效应,探讨脑微血管内皮细胞(cerebral microvascular endothelial cells,CMECs)调控神经元功能的机制。方法:通络救脑注射液(Tongluo Jiunao Injection,TLJNI)作用于正常、缺血和缺血再灌三种培养状态的大鼠CMECs,分别收集有药物干预及无干预的三对无血清内皮细胞条件培养液,并测定其LDH值。同步原代培养大鼠脑皮质神经元,亦分为正常、缺血、缺血再灌三组,用低(10%)、中(50%)、高(100%)三种浓度的各类CMECs-CM分别作用上述三种培养状态的神经元,测定其LDH漏出率。结果:比较TLJNI干预后的CMECs-CM与无干预的CMECs-CM中LDH漏出值,CMECs缺血组与缺血再灌组经药物干预后均明显降低(P<0.01)。对于缺血神经元,缺血内皮细胞条件培养液(conditioned medium of ischemic CMECs,Is-CM)高浓度(100%)和TLJNI干预后的缺血内皮细胞条件培养液(conditioned medium of ischemic CMECs with drug treatment,IsT-CM)高浓度(100%)作用后表现为增加LDH漏出率(P<0.01),而低浓度10%的IsT-CM则降低LDH漏出率(P<0.05);对于缺血再灌神经元,与对照组比较,各类CMECs-CM作用后均能降低神经元LDH漏出率(P<0.05或P<0.01)。比较每种条件液相邻浓度间的效应差异,均以10%或50%的CM降低损伤为佳,正常内皮细胞条件培养液(conditioned medium of normal CMECs,N-CM)及缺血再灌内皮细胞条件培养液(conditioned medium of ischemic/reperfusional CMECs,Rp-CM)组间差异有统计学意义(P<0.05或P<0.01);对于正常神经元,各类CMECs-CM作用后均增加了神经元LDH漏出率(P<0.05或P<0.01)。比较每种条件液相邻浓度间的效应差异,N-CM组间差异有统计学意义(P<0.05或P<0.01)。结论:TLJNI能够防御CMECs缺血及缺血再灌的损伤,�
文摘Various stem cells, including neural stem cells （NSCs）, have been extensively studied in stroke models, but how to increase neuronal differentiation rate of NSCs remains unresolved, particu- larly in a damaged environment. The purpose of this study was to investigate the effects of cerebral mi- crovascular endothelial cells （CMECs） on the neurogenesis of NSCs with or without oxygen-glucose deprivation （OGD）. The NSCs acquired from primary culture were immunostained to prove cell purity. Survival and proliferation of NSCs were determined after the co-culture with CMECs for 7 days. After removing the CMECs, NSCs were randomly divided into two groups as follows： OGD and non-OGD groups. Both groups were maintained in differentiation culture for 4 days to evaluate the differentiation rate. Mouse embryo fibroblast （MEF） cells co-cultured with NSCs served as control group. NSCs co-cultured with CMECs had an increase in size （on the 7th day： 89.80±26.12 μm vs. 73.08±15.01μm, P〈0.001） （n=12） and number [on the 7th day： 6.33±5.61/high power objective （HP） vs. 2.23±1.61/HP, P〈0.001] （n=12） as compared with those co-cultured with MEF cells. After further differentiation cul- ture for 4 days, NSCs co-cultured with CMECs had an increase in neuronal differentiation rate in OGD and non-OGD groups, but not in the control group （15.16% and 16.07% vs. 8.81%; both P〈0.001） （n=6） This study provided evidence that OGD could not alter the effects of CMECs in promoting the neuronal differentiation potential of NSCs. These findings may have important implications for the development of new cell therapies for cerebral vascular diseases.
