丙泊酚对布比卡因诱导的PC12细胞毒性、活性氧和过氧化氢酶的影响

目的探讨丙泊酚对布比卡因诱导的PC12细胞毒性的保护作用及活性氧（ROS）和过氧化氢酶（CAT）在其中的作用。方法培养的PC12细胞分成四组：正常对照组（C组）；丙泊酚组（P组），在细胞培养基中加入2mmol／L，丙泊酚；布比卡因组（B组），在细胞培养基中加入0．09mmol／L布比卡因；丙泊酚加布比卡因组（PB组），在细胞培养基中同时加入2mmol／L，丙泊酚和0．09mmol／L布比卡因；每组6孔。培养6h和24h后，用倒置相差显微镜观察细胞形态、MTT比色微量分析细胞活性，测定上清液乳酸脱氢酶（LDH）活性和细胞内CAT、ROS活性。结果与c组相比，B组PC12细胞活性和细胞内CAT活性显著降低（P＜0．01），LDH活性和细胞内ROS活性显著增加（P＜0．01）；P组PC12细胞活性及其它指标无显著变化；与B组相比，PB组PC12细胞活性和细胞内CAT活性显著增加（P〈0．05），LDH活性和细胞内ROS活性显著降低（P＜0．01）。结论布比卡因对PC12细胞具有毒性作用，可能与降低细胞内CAT活性、增加ROS活性有关；丙泊酚通过保护细胞内CAT活性和清除ROS而减轻布比卡因诱导的PC12细胞毒性。     

丙泊酚对布比卡因诱导的PC12细胞毒性、活性氧和过氧化氢酶的影响

目的探讨丙泊酚对布比卡因诱导的PC12细胞毒性的保护作用及活性氧(ROS)和过氧化氢酶(CAT)在其中的作用。方法培养的PC12细胞分成四组:正常对照组(C组);丙泊酚组(P组),在细胞培养基中加入2mmol/L丙泊酚;布比卡因组(B组),在细胞培养基中加入0.09mmol/L布比卡因;丙泊酚加布比卡因组(PB组),在细胞培养基中同时加入2mmol/L丙泊酚和0.09mmol/L布比卡因;每组6孔。培养6h和24h后,用倒置相差显微镜观察细胞形态、MTT比色微量分析细胞活性,测定上清液乳酸脱氢酶(LDH)活性和细胞内CAT、ROS活性。结果与C组相比,B组PC12细胞活性和细胞内CAT活性显著降低(P<0.01),LDH活性和细胞内ROS活性显著增加(P<0.01);P组PC12细胞活性及其它指标无显著变化;与B组相比,PB组PC12细胞活性和细胞内CAT活性显著增加(P<0.05),LDH活性和细胞内ROS活性显著降低(P<0.01)。结论布比卡因对PC12细胞具有毒性作用,可能与降低细胞内CAT活性、增加ROS活性有关;丙泊酚通过保护细胞内CAT活性和清除ROS而减轻布比卡因诱导的PC12细胞毒性。     

异丙酚对布比卡因致PC12细胞毒性时细胞Ca2+浓度和一氧化氮合酶活性的影响

目的 评价异丙酚对布比卡因致PC12细胞毒性时细胞Ca2+浓度和一氧化氮合酶(NOS)活性的影响.方法 PC12细胞悬液(105/ml)随机分成4组:对照组(C组)、异丙酚组(P组)、布比卡因组(B组)和异丙酚+布比卡因组(PB组),每组PC12细胞分别接种于36孔板(每孔1 ml,每组9孔)、激光共聚焦显微镜专用培养皿(每皿1 ml,每组6皿)和24孔板(每孔 1 ml,每组6孔).C组加入D-Hank液500 μl;P组加入异丙酚至终浓度为2 mmol/L;B组加入布比卡因至终浓度为0.09 mmol/L;PB组同时加入异丙酚和布比卡因,终浓度分别为2 mmol/L和0.09 mmol/L.于36孔板中孵育24 h后测定PC12细胞凋亡率;于激光共聚焦显微镜专用培养皿中孵育6、24 h时,测定PC12细胞游离Ca2+浓度;于24孔板中孵育6、24 h时测定细胞NOS活性.结果 与C组相比,B组和PB组PC12细胞游离Ca2+浓度、NOS活性和凋亡率均升高(P<0.01),P组上述指标差异无统计学意义(P>0.05);与B组相比,PB组PC12细胞游离Ca2+浓度、NOS活性和凋亡率均降低(P<0.05).结论 在细胞水平,异祆丙酚可能通过抑制NOS活性和钙超载,减轻布比卡因诱导的神经毒性.     

胰岛素对百草枯诱导的PC12细胞的保护作用

目的 观察培养的PC12细胞中多巴胺D2受体(DA D2R)蛋白的表达,胰岛素对百草枯(paraquat,PQ)诱导的PC12细胞形态学、生存率和DA含量的影响.方法 应用免疫沉淀Western印迹分析技术对培养的PC12细胞中DA D2R表达的检测;应用二甲基噻唑二苯基四唑溴盐(MTT)法,观察PC12细胞暴露于不同浓度PQ组和胰岛素预先干预后再暴露于PQ组后细胞形态学和生存率的改变;应用酶联免疫吸附试验(ELISA)方法检测空白对照PC12细胞组、PQ干预组、胰岛素组和胰岛素加PQ组PC12细胞上清液DA的浓度.结果 (1)Western法检测到培养的PC12细胞中有DA D2R蛋白的表达;(2)空白对照组PC12细胞形态胞体呈梭形,细胞突触完整;PC12细胞暴露T600 μmol/L PQ组24h,多数细胞胞体变圆、空泡变性、突触变短或消失.预加100 nmol/L胰岛素预处理20 min后、再暴露于600 μmol/L PQ组24 h,与空白对照组比较细胞形态略有改变,细胞形态呈梭形或不规则但非圆形,细胞突触又有生长;(3)PC12细胞生存率与PQ干预的浓度呈反向变化趋势;而胰岛素可以减少600 μmol/L PQ 24 h内对PC12细胞生存率的毒性损伤;(4)胰岛素可在一定程度上提高正常PC12细胞和600μmol/L PQ干预的PC12细胞上清液中的DA浓度,但差异无统计学意义(P>0.05).结论 胰岛素对PQ损害的PC12多巴胺能神经元细胞有保护作用.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

胰岛素对百草枯诱导的PC12细胞的保护作用

Objective To observe dopamine (DA) D2R protein expression in the cultured PC 12 cells and the effect of insulin on the survival rate,morphology,and DA of paraquat (PQ)-induced PC12 cells. Methods Immunoprecipitate Western blotting method was performed to observe DA D2R protein expression in PC 12 cells,MTT assay was used to analyze the changes in viability and morphology of PC 12 ceils which were exposed to different concentrations of PQ and insulin. Results (1) DA D2R protein was expressed in PC 12 ceils. (2) Normal PCI2 cells bodies showed fusiform shape and the synapses were in-tegrity. The cells which were exposed to the 600 μmol/L PQ became ball-like, vacuolar degeneration oc-urred,and the synapse became shorter or disappeared. But the morphology of PC12 cells had a little difference between the normal PC12 and the insulin groups,except that the cells were fusiform shape or a-nomalism but not round shape,and the synapses grew. (3) With the increase of the concentration of PQ, the viability of the cells was decreased. Insulin increased the viability of the ceils which were exposed to 600 μmol/L PQ. Insulin elevated DA concentration both in the normal PC12 cells and those exposed to 600 μmol/L PQ,but there was no significant difference ( P > 0.05 ). Conclusion Insulin could protect the PC12 dopaminergic neurons from injury induced by PQ.     

米诺环素调控小胶质细胞激活对PC12细胞生长的影响

目的探讨米诺环素抑制小胶质细胞激活对PC12生长和凋亡的影响。方法 BV2细胞分为对照组、LPS组、LPS加米诺环素组;以LPS刺激激活小胶质细胞系BV2细胞,用米诺环素干预BV2细胞的激活;将各组BV2细胞与PC12细胞进行共培养24h;酶联免疫吸附法检测共培养体系细胞上清液TNF-α、IL-1β的含量,MTT法检测PC12细胞生存率。结果 BV2细胞与PC12细胞共培养24h后,LPS组上清液炎症因子TNF-α、IL-1β表达明显升高,PC12细胞存活率下降,米诺环素能抑制以上趋势。结论 MG激活对PC12细胞存在明显损伤效应,米诺环素可保护MG介导的PC12细胞损伤,可能与通过下调炎症表达有关。     

利多卡因对N-甲基-D-天冬氨酸抑制大鼠肾上腺嗜铬细胞瘤细胞增殖的影响

目的 观察利多卡因对 N-甲基-D-天冬氨酸(NMDA)抑制大鼠肾上腺嗜铬细胞瘤细胞(PC12细胞)增殖的影响。方法 将体外培养的 PC12细胞分为6组，分别采用正常不含药液的培养基(C组)；含400μmol·L(-1)NMDA 的培养基(N组)；NMDA 分别混合10μmol·L~(-1)(L_1组)、10~2μmol·L~(-1)(L_2组)、10~3μmol·L~(-1)(L_3组)以及10~4μmol·L~(-1)(L_4组)利多卡因的培养基培养5d，应用流式细胞仪测定细胞 DNA 相对含量，解析细胞周期，计算 S 期细胞荧光强度占受测细胞总荧光强度的百分数为 S期分数(SPF)和 S 期与 G_2期细胞荧光强度之和与 M 期细胞荧光强度的比值[(S G_2)/M]。结果 与C 组比较，N、L_1组 SPF 和(S G_2)/M 均降低(P<0.05)，L_4组 SPF 降低(P<0.05)，而 L_2及 L_3组 SPF和(S G_2)/M 差异无统计学意义(P>0.05)。与 N 组比较，L_2、L_3及 L_4组 SPF 和(S G_2)/M 升高(P<0.05)，L_1组 SPF 升高(P<0.05)，而(S G_2)/M 差异无统计学意义(P>0.05)。结论 NMDA 可以通过抑制 PC12细胞 DNA 合成而影响细胞的增殖活性，利多卡因能拮抗 NMDA 对 PC12细胞增殖的抑制作用。     

神经生长因子诱导后的神经元样PC12细胞与成肌干细胞共培养的实验研究

目的 探讨神经元样PC12细胞对C3H小鼠成肌干细胞C2C12增殖与分化的影响. 方法 利用Transwell建立PC12细胞和C2C12细胞共培养体系,实验分为3组:空白对照组:C2C12细胞单独培养；实验组:C2C12细胞与已分化的PC12细胞共培养；阴性对照组:C2C12细胞与未分化的PC12细胞共培养.免疫荧光染色鉴定神经生长因子(NGF)对PC12细胞的促分化效应；流式细胞仪检测共培养条件下C2C12细胞的增殖情况；逆转录聚合酶链式反应(RT-PCR)和实时荧光定量核酸扩增(qPCR)检测与PC12细胞共培养3、7d后C2C12细胞生肌索、结蛋白基因的表达.结果 体外条件下,NGF诱导PC12细胞呈现神经元样特征:具有细长的细胞突起,并阳性表达微管相关蛋白-2.流式细胞仪检测证实:已经分化的PC12细胞抑制C2C12细胞的增殖.实验组DNA合成前期的C2C12细胞所占百分比(77.2％±0.4％)较空白对照组(71.0％±0.6％)和阴性对照组(70.8％±0.8％)高,反应增殖活力的增殖指数(22.8％±0.4％)较空白对照组(29.0％±0.6％)和阴性对照组(29.2％±0.8％)低,差异均有统计学意义(P＜0.05).实验组C2C12细胞生肌素、结蛋白基因的表达高于同一培养时间其他组,差异均有统计学意义(P＜0.05). 结论 神经化的PC12细胞抑制C2C12细胞的增殖,但促进其分化.     

塞来昔布对PC12细胞的凋亡作用及对血管内皮生长因子表达的影响

目的体外探讨COX-2抑制剂塞来昔布对PC12细胞的生长影响及血管内皮生长因子VEGF的表达的调控。方法应用噻唑蓝（MTT）比色法观察塞来昔布对大鼠嗜铬细胞瘤细胞系PC12细胞的生长抑制作用;Wrights-Giemsa染色法观察细胞形态学;流式细胞技术观察细胞在各时间点的凋亡率;Western blot检测VEGF-165蛋白的表达变化。结果塞来昔布呈时间、剂量依赖性抑制PC12细胞,24h半数抑制浓度（IC50）为100μmol/L;各点凋亡率均高于空白对照组;塞来昔布能抑制PC12细胞的VEGF-165蛋白表达,且跟时间正相关。结论 COX-2抑制剂塞来昔布能抑制PC12细胞增殖,诱导细胞凋亡,抑制VEGF蛋白表达。     

异丙酚对肺缺血再灌注损伤大鼠肺上皮细胞凋亡的影响

目的拟通过观察肺上皮细胞凋亡的变化,探讨异丙酚减轻大鼠肺缺血再灌注损伤的作用机制。方法雄性SD大鼠136只,随机分为3组:假手术组(S组,n=24)、缺血再灌注组(I/R组,n=56)、异丙酚组(P组,n=56)。I/R组、P组制备大鼠肺原位热缺血模型,缺血1h。P组于缺血前30min静脉输注异丙酚20mg·kg~(-1)·h~(-1)至再灌注4h。S组除不作缺血处理外,其余处理与I/R组相同。分别于再灌注0.5、1、2、4h随机处死大鼠(S组每个时点处死6只,I/R组、P组每个时点分别处死14只大鼠),每组每个时点的一半大鼠用于测定支气管肺泡灌洗液(BALF)中中性粒细胞百分比、蛋白浓度,另外一半大鼠用于测定肺组织丙二醛(MDA)含量、湿,干重比(W/D)及肺上皮细胞凋亡指数(TUNEL法),并在光镜下观察肺组织的病理学改变;I/R组、P组肺上皮细胞凋亡指数与W/D进行直线相关分析。结果与S组相比,I/R组和P组再灌注各时点BALF中中性粒细胞百分比、蛋白浓度及肺组织MDA含量、W/D、肺上皮细胞凋亡指数均增加(P<0.05或0.01);与I/R组比较,P组上述指标均降低(P<0.05或0.01),肺组织病理学损伤减轻;I/R组、P组肺上皮细胞凋亡指数与W/D之间的相关系数分别为0.784、0.830(P<0.01)。结论异丙酚抑制肺上皮细胞凋亡可能是减轻大鼠肺缺血再灌注损伤的机制之一。     

异氟醚预处理对谷氨酸诱导大鼠神经元样PC12细胞凋亡的影响

目的 探讨异氟醚预处理对谷氨酸诱导大鼠神经元样PC12细胞凋亡的影响.方法 神经生长因子孵育5d的神经元样PC12细胞,以5×104个/ml密度接种于6 cm培养皿(3 ml/皿)或6孔板(2ml/孔),采用随机数字表法,将其随机分为4组(n=18):正常对照组(C组)、谷氨酸组(G组)、谷氨酸+异氟醚组(GI组)和谷氨酸+异氟醚+三磷酸肌醇受体拮抗剂光溜海绵素组(GIX组).C组不做任何处理;G组、GI组和GIX组均加入500 μmol/L谷氨酸,GI组和GIX组通入1.2％异氟醚2h,停止通入后10 min加入谷氨酸,GIX组通入异氟醚前即刻加入光溜海绵素100 nmol/L.于谷氨酸孵育20 min时,每组取6皿和6孔,收集细胞,采用流式细胞术检测细胞凋亡率和线粒体膜电位(MMP),采用显微荧光测量技术检测细胞内钙离子浓度([Ca2+]i).结果 与C组比较,G组和GIX组细胞凋亡率和[Ca2+]i升高,MMP降低(P＜0.01),GI组上述指标差异无统计学意义(P＞0.05);与G组比较,GI组和GIX组细胞凋亡率和[Ca2+]i降低,MMP升高(P＜0.05或0.01);与GI组比较,GIX组细胞凋亡率和[Ca2+]i升高,MMP降低(P＜0.01).结论 异氟醚预处理可抑制大鼠神经元样PC12细胞凋亡,其机制与激活内质网三磷酸肌醇受体,抑制内质网释放Ca2+,提高MMP有关.     

原代培养雪旺细胞对PC12细胞促分化作用的研究

目的探讨原代培养雪旺细胞对PC12细胞的促分化作用。方法原代培养的雪旺细胞选择性培养液（SCM）刺激PC12细胞观察其分化情况，并以神经生长因子（nervegrowth factor，NGF）、脑源性神经营养因子（brain derived nerve factor，BDNF）为对照组，用免疫组化染色加以验证。结果SCM刺激PC12细胞后促进其分化与NGF刺激后的结果类似，而BDNF刺激PC12细胞后细胞分化不明显。结论雪旺细胞的分泌液可促进PC12细胞分化。