鱼藤素对SH-SY5Y神经母细胞瘤细胞凋亡的诱导作用

目的研究鱼藤素对SH-SY5Y细胞凋亡的诱导作用。方法鱼藤素(0、0.625、1.25、2.5、5、10、20μmol·L~(-1))处理SH-SY5Y细胞24、48、72 h后,CCK-8法测定细胞存活率。鱼藤素(0、8、20、50μmol·L~(-1))处理SH-SY5Y细胞24 h,光镜下及AO/EB双染分别观察细胞形态和凋亡形态,流式细胞术检测细胞凋亡率,DCFH-DA荧光探针法检测细胞活性氧水平,分光光度法检测caspase-3活化程度。结果鱼藤素对SH-SY5Y细胞存活率呈时间和浓度依赖性抑制作用,作用24、48、72 h的IC50值分别为(26.07±2.18)、(18.33±0.94)、(12.5±1.49)μmol·L~(-1)。鱼藤素处理24 h后,细胞凋亡率、细胞活性氧水平明显上升(P<0.05),caspase-3活化程度升高,且三者均有浓度-效应特征。结论鱼藤素可抑制SH-SY5Y细胞存活,诱导细胞凋亡,其机制可能与升高活性氧水平和活化caspase-3相关。     

蜗牛多肽混合物抗过氧化氢诱导的SH-SY5Y细胞损伤的作用

目的观察蜗牛多肽混合物对过氧化氢(H2O2)诱导SH-SY5Y细胞氧化损伤的抑制作用及其可能机制。方法用H2O2诱导SH-SY5Y细胞损伤,MTT法测定细胞存活率;39～1250 mg·L-1蜗牛多肽混合物处理后,Hoechst染色检测细胞凋亡;罗丹明123染色检测线粒体通透性;细胞免疫化学技术和Western blot技术分别检测增殖细胞核抗原(PCNA)和脑源性神经营养因子(BDNF)的表达。结果 1.54 mmol·L-1H2O2可诱导SH-SY5Y细胞凋亡。用39～156 mg·L-1浓度的蜗牛多肽混合物处理后,H2O2诱导的SH-SY5Y细胞凋亡数量明显减少,同时可减少H2O2引起的线粒体通透性增加,升高PCNA与BDNF的表达(P﹤0.01)。结论蜗牛多肽混合物可抑制过氧化氢诱导的SH-SY5Y细胞凋亡,其作用机制可能与其增加细胞PCNA与BDNF的表达有关。     

L-肌肽对鱼藤素诱导SH-SY5Y细胞神经毒性的保护作用

目的研究L-肌肽是否能通过抗氧化活性降低鱼藤素导致的神经毒性。方法 SH-SY5Y细胞在L-肌肽(1、10、20、40、60、80、100 mmol·L~(-1))中培养24 h,CCK-8法测定细胞存活率。30 mmol·L~(-1) L-肌肽、20μmol·L~(-1)鱼藤素、20μmol·L~(-1)鱼藤素与30 mmol·L~(-1) L-肌肽作用于SH-SY5Y细胞24 h,AO/EB法检测细胞形态和凋亡情况。8μmol·L~(-1)鱼藤素、8μmol·L~(-1)鱼藤素与3 mmol·L~(-1) L-肌肽、8μmol·L~(-1)鱼藤素与30 mmol·L~(-1) L-肌肽、20μmol·L~(-1)鱼藤素、20μmol·L~(-1)鱼藤素与3 mmol·L~(-1) L-肌肽、20μmol·L~(-1)鱼藤素与30 mmol·L~(-1) L-肌肽、50μmol·L~(-1)鱼藤素、50μmol·L~(-1)鱼藤素与3 mmol·L~(-1) L-肌肽、50μmol·L~(-1)鱼藤素与30 mmol·L~(-1) L-肌肽作用于SH-SY5Y细胞24 h,CCK-8法检测细胞的增殖情况;双染流式细胞术检测细胞凋亡率;DCFH-DA流式细胞术检测细胞活性氧(ROS)水平。结果 20μmol·L~(-1)鱼藤素与30 mmol·L~(-1) L-肌肽共作用于细胞后,细胞抑制率降低9.07%,早期凋亡的细胞数减少,早期凋亡率降低9.35%,总凋亡率降低10.7%,ROS水平低于20μmol·L~(-1)鱼藤素组,结果差异具有统计学意义(P<0.05)。结论 L-肌肽能有效降低鱼藤素诱导SH-SY5Y细胞的神经毒性,保护细胞,其机制可能与降低氧化应激水平相关。     

红花甙对过氧化氢诱导SH-SY5Y细胞凋亡保护作用的实验研究

目的研究红花甙(carthamin)对过氧化氢(H2O2)诱导神经母细胞瘤SH-SY5Y细胞(SH-SY5Y cells)凋亡的影响,并探讨其机制。方法实验分为空白对照组、H2O2损伤组及红花甙高、中、低剂量组。用H2O2作用于SH-SY5Y细胞,使其发生凋亡。MTT法检测SH-SY5Y细胞活性,比色法测丙二醛(MDA)的含量,流式细胞仪检测细胞凋亡。结果与损伤组比较,随着红花甙剂量的增加,SH-SY5Y细胞存活率提高(P<0.01),MDA生成量减少(P<0.01),凋亡率下降(P<0.05)。结论红花甙对H2O2诱导SH-SY5Y细胞凋亡有保护作用,与红花甙能抗氧化、降低细胞凋亡有关。     

20-羟基蜕皮甾酮对H_2O_2诱导SH-SY5Y细胞损伤的保护作用

本文旨在研究一种类固醇激素即20-羟基蜕皮甾酮对H2O2诱导的SH-SY5Y细胞损伤的保护作用及其作用机制。预孵育20-羟基蜕皮甾酮可以明显提高H2O2诱导的SH-SY5Y细胞的生存率,减少乳酸脱氢酶（LDH）漏出率,抑制脂质过氧化水平（MDA）升高,提高超氧化物歧化酶（SOD）活性。此外,20-羟基蜕皮甾酮可以通过降低Bax/Bcl-2的比值,延缓caspase-3的活化来抑制H2O2诱导的细胞凋亡。本研究表明20-羟基蜕皮甾酮对H2O2诱导的SH-SY5Y细胞具有保护作用,有可能用于由氧化应激和凋亡导致的神经退行性疾病的治疗。     

不同来源石斛对SH-SY5Y细胞缺血性损伤保护作用的比较

目的研究市售种植铁皮枫斗和组培铁皮石斛对谷氨酸损伤的SH—SY5Y细胞的保护作用。方法利用血清药理学方法制备含药血清,用SH—SY5Y细胞建立谷氨酸损伤模型,观察72h损伤细胞增殖情况,MTT实验测定细胞活性,乳酸脱氢酶（LDH）、超氧化物歧化酶（SOD）和丙二醛（MDA）的测定研究两种来源石斛对神经细胞损伤保护作用。结果种植和组培石斛均可提高SH-SY5Y细胞谷氨酸损伤的存活率,降低培养液中LDH含量和细胞内MDA含量,提高SOD活力,其中铁皮石斛胚芽的抗氧化能力优于市售铁皮枫斗。结论石斛具有对SH—SY5Y细胞谷氨酸损伤的保护作用;组培铁皮石斛较市售铁皮枫斗保护作用更加显著,初步证明经过组培繁殖的铁皮石斛作用效果优于市售石斛属药用植物。     

人参水提物对MPP^＋诱导的SH-SY5Y细胞凋亡的保护作用

目的研究人参水提物（WEG）对四氢吡啶离子（MPP^＋）诱导SH-SY5Y细胞凋亡的影响。方法体外培养SH-SY5Y细胞,建立MPP＋致SH-SY5Y细胞凋亡的模型,同时给予WEG干预。应用MTT比色法检测细胞活力;Hoechst33258染色观察细胞形态学变化,流式细胞仪检测细胞凋亡率。结果0.5mmol·L^-1MPP^＋作用于SH-SY5Y细胞60h,MTT值降低到（51.97%±2.46%）（P〈0.01）,Hoechst 33258染色可见明显的颗粒状和固缩状荧光,凋亡率增加到（40.52%±1.68%）（P〈0.01）,而WEG则能明显改善SH-SY5Y细胞的凋亡特性,显著升高其MTT值,降低凋亡率（P〈0.05）。结论人参水提物对MPP＋诱导的SH-SY5Y细胞凋亡具有显著的保护作用。     

类叶升麻苷对鱼藤酮致SH-SY5Y细胞凋亡的保护作用

目的探讨类叶升麻苷对鱼藤酮致多巴胺能神经元SH-SY5Y细胞凋亡的保护作用及其机制。方法采用MTT法检测细胞存活率,以荧光染料Hoechst33342染色分析细胞核的形态学变化,用流式细胞仪定量分析细胞凋亡峰,以2,′7′-二氢二氯荧光黄双乙酸钠(DCFH-DA)为标记探针检测细胞内活性氧的产生。结果①0.5μmol.L-1的鱼藤酮处理SH-SY5Y细胞48 h能引起细胞存活率的显著下降;诱导细胞发生凋亡,凋亡率达47.39%;大部分细胞胞体皱缩,突起缩短消失或断裂;染色质皱缩、浓缩、断裂及形成凋亡小体;细胞内活性氧水平上升。②预先用盐生肉苁蓉提取物类叶升麻苷(10,20或40 mg.L-1)处理细胞6 h,可提高细胞存活率;明显改善鱼藤酮引起的细胞形态学变化;流式细胞仪检测凋亡率分别降低到25.87%,23.97%,10.45%;以DCFH-DA为标记探针检测到20 mg.L-1类叶升麻苷可明显抑制鱼藤酮引起的细胞内活性氧产生。结论类叶升麻苷能抑制鱼藤酮诱导的多巴胺能神经元SH-SY5Y细胞凋亡,其神经细胞保护作用可能与降低细胞内活性氧水平有关。     

扇贝糖胺聚糖对六羟基多巴胺诱导SH-SY5Y细胞凋亡的保护作用

<正>研究报道[1-2]多种海洋多糖可通过抗氧化应激发挥神经保护作用,但海洋贝类多糖神经保护活性的研究则鲜有报道。扇贝糖胺聚糖(Chlamys farreri skirts glycosaminoglycan,CFS-GAG)是本组从海洋贝类栉孔扇贝裙边中提取的活性成分,已获专利(专利号:ZL200410035656.3)。已证实CFSGAG对血管内皮细胞氧化应激损伤有保护作用[3],本文研究其对六羟基多巴胺(6-OHDA)诱导SH-SY5Y神经元细胞凋亡的保护作用。     

13-甲基十四烷酸对H2O2诱导SH-SY5Y神经细胞损伤的保护作用

目的：探讨13-甲基十四烷酸（13-MTD）对过氧化氢（H2O2）诱导SH-SY5Y神经细胞损伤的影响。方法：采用体外细胞培养的方法,建立SH-SY5Y神经细胞H2O2损伤模型。光镜观察细胞形态,SRB法检测细胞存活率,AO/EB双重染色法检测细胞凋亡,MTT法检测线粒体活性。结果：与正常对照组相比,H2O2损伤模型组细胞出现明显病理改变,细胞存活率、线粒体活性均显著下降（P〈0.01）,细胞凋亡率显著升高（P〈0.01）;13-MTD10、20、40μg/mL可显著提高细胞存活率（P〈0.01）;13-MTD5、10、20μg/mL可显著下调细胞凋亡率（P〈0.01）;13-MTD5、10、20、40μg/mL可显著提高细胞MTT代谢率（P〈0.01）;且存在一定量效差异（P〈0.05,P〈0.01）。结论：不同剂量的13-MTD对H2O2诱导的SH-SY5Y神经细胞氧化损伤具有保护作用。     

Protective Effect of Total Phenolic Compounds from Inula helenium on Hydrogen Peroxide-induced Oxidative Stress in SH-SY5Y Cells

Inula helenium has been reported to contain a large amount of phenolic compounds, which have shown promise in scavenging free radicals and prevention of neurodegenerative diseases. This study is to investigate the neuroprotective effects of total phenolic compounds from I. helenium on hydrogen peroxide-induced oxidative damage in human SH-SY5Y cells. Antioxidant capacity of total phenolic compounds was determined by radical scavenging activity, the level of intracellular reactive oxygen species and superoxide dismutase activity. The cytotoxicity of total phenolic compounds was determined using a cell counting kit-8 assay. The effect of total phenolic compounds on cell apoptosis due to hydrogen peroxide-induced oxidative damage was detected by Hoechst 33258 and Annexin-V/PI staining using fluorescence microscope and flow cytometry, respectively. Mitochondrial function was evaluated using the mitochondrial membrane potential and mitochondrial ATP synthesis by JC-1 dye and high performance liquid chromatography, respectively. It was shown that hydrogen peroxide significantly induced the loss of cell viability, increment of apoptosis, formation of reactive oxygen species, reduction of superoxide dismutase activity, decrease in mitochondrial membrane potential and a decrease in adenosine triphosphate production. On the other hand, total phenolic compounds dose-dependently reversed these effects. This study suggests that total phenolic compounds exert neuroprotective effects against hydrogen peroxide-induced oxidative damage via blocking reactive oxygen species production and improving mitochondrial function. The potential of total phenolic compounds and its neuroprotective mechanisms in attenuating hydrogen peroxide-induced oxidative stress-related cytotoxicity is worth further exploration.     

葫芦素B抑制神经母细胞瘤SH-SY5Y细胞增殖机制的初步研究

目的研究葫芦素B对神经母细胞瘤SH-SY5Y细胞增殖的影响及其作用的分子机制。方法通过MTT法检测葫芦素B对SH-SY5Y细胞增殖的影响,流式细胞仪检测葫芦素B对SH-SY5Y细胞凋亡和生理水平上活性氧含量、线粒体膜电位的影响。Hoechst 33258染色检测药物处理前后细胞形态的变化。Westernblot检测葫芦素B处理SH-SY5Y细胞24 h前后Bcl-2、Bax、p21、p53等蛋白合成的变化。结果实验浓度范围内,葫芦素B可时间与浓度依赖性地抑制SH-SY5Y细胞增殖;浓度依赖性地诱导SH-SY5Y细胞凋亡、活性氧水平升高和线粒体膜去极化;在蛋白水平上,葫芦素B能诱导凋亡抑制蛋白Bcl-2下调,促凋亡蛋白Bax、p21、p53上调。结论葫芦素B在体外能显著抑制SH-SY5Y细胞增殖,这一影响可能通过诱导细胞凋亡、ROS积累、线粒体膜去极化及其相关蛋白表达变化来实现。     

壁虎粗多肽对SH-SY5Y细胞增殖和凋亡的影响

目的 研究壁虎粗多肽(GCPs)对人神经母细胞瘤(SH-SY5Y)细胞增殖、凋亡能力的影响.方法 用不同浓度GCPs(0,0.08,0.12,0.16,0.20,0.24,0.32 mg·mL-1)分别处理SH-SY5Y细胞24,48,72 h,用噻唑蓝(MTT)比色法检测SH-SY5Y细胞增殖能力的变化,根据MTT结...     

黄芩苷通过上调SIRT1保护SH-SY_5Y氧化应激的损伤

观察黄芩苷(baicalin,BL)对过氧化氢诱导SH-SY5Y细胞损伤的作用,并初步探讨SIRT1是否是其发挥作用的靶点及其可能机制。培养的人神经母细胞瘤细胞系SH-SY5Y细胞加入黄芩苷(25、50及100μmol·L-1)预孵育12 h,加入H2O2(150μmol·L-1)作用24 h诱导产生氧化损伤,应用MTT比色法检测细胞存活率,测定培养液中乳酸脱氢酶(LDH)漏出率、一氧化氮(NO)含量;并采用流式细胞仪检测细胞凋亡及应用免疫荧光组化法检测Caspase-3的活性、RT-PCR检测SIRT1水平。结果表明,与H2O2模型组比较,黄芩苷(50和100μmol·L-1)组的细胞存活率增高(P<0.05、P<0.01),而LDH、NO的释放量及细胞凋亡数(P<0.05、P<0.01)、Caspase-3的表达量均减少;SIRT1 mRNA表达明显(P<0.05、P<0.01)。黄芩苷对H2O2损伤的SY5Y细胞具有保护作用,可减轻神经细胞的损伤、抑制细胞的凋亡,其作用机制可能是通过上调SIRT1水平而抑制Caspase-3表达实现的。     

Apoptosis induced by acrylamide in SH-SY5Y cells

Acrylamide (1–5 mM) dose-dependently decreased cell viability in human neuroblastoma cells (SH-SY5Y). The caspase-3 activity and cell population in sub-G₁ phase were elevated and peaked on exposure to 3 mM acrylamide, while both were less so at higher dose (4 and 5 mM). Z-VAD-fmk, a pan-caspase inhibitor, lowered the apparent cytotoxicity of acrylamide. U0126, a specific inhibitor of extracellular signal-regulated protein kinase (ERK) kinase, suppressed the elevation of caspase-3 activities as well as that of sub-G₁ population. Thus, although mechanisms other than caspase-dependent apoptosis may be involved, apoptotic process seems to take place in the genesis of toxicity of acrylamide in SH-SY5Y cells through ERK pathway and activation of caspase-3.     

Curcumin inhibits appoptosin-induced apoptosis via upregulating heme oxygenase-1 expression in SH-SY5Y cells

Aim:

Appoptosin (SLC25A38) is a pro-apoptotic protein, which is upregulated in Alzheimer''s disease (AD) brains and plays an important role in promoting the pathological progress of AD. The aim of this study was to investigate the effects of curcumin from the rhizome of Curcuma longa on appoptosin-induced apoptosis in SH-SY5Y cells.

Methods:

SH-SY5Y cells were pretreated with curcumin, then transfected with appoptosin or vector. The apoptotic cells were detected with Annexin V staining analysis by flow cytometry. The expression of cleaved caspase-3, appoptosin, heme oxygenase-1 (HO-1) was examined using Western blotting. Intracellular level of ROS was measured with DCFH-DA staining by flow cytometry analysis. Mitochondrial membrane potential (ΔΨm) was detected with JC-1 staining under a fluorescence microscope and quantified by fluorescence ratio detection.Overexpression of appoptosin in SH-SY5Y cells markedly increased cell apoptosis accompanied by reduced HO-1 expression, increased intracellular heme level, ROS overproduction and ΔΨm impairment. Treatment of SH-SY5Y cells with curcumin (2.5–20 μmol/L) for 24 h did not significantly affect their viability. However, pretreatment with curcumin (2.5–20 μmol/L) dose-dependently attenuated all above-mentioned pathological changes in appoptosin-transfected SH-SY5Y cells.

Results:

Overexpression of appoptosin in SH-SY5Y cells markedly increased cell apoptosis accompanied by reduced HO-1 expression, increased intracellular heme level, ROS overproduction and ΔΨm impairment. Treatment of SH-SY5Y cells with curcumin (2.5–20 μmol/L) for 24 h did not significantly affect their viability. However, pretreatment with curcumin (2.5–20 μmol/L) dose-dependently attenuated all above-mentioned pathological changes in appoptosin-transfected SH-SY5Y cells.

Conclusion:

Curcumin inhibits appoptosin-induced apoptosis in SH-SY5Y cells by upregulating the expression of HO-1, reducing the production of intracellular heme and ROS, and preventing the ΔΨm loss.