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1.
目的:观察活性氧(ROS)是否参与大剂量氯胺酮致原代培养皮层神经元凋亡?方法:单纯培养基(C组)?1 mmol/L氯胺酮(K组)?1 mmol/L氯胺酮复合2.5 μmol/L超氧化物歧化酶类似物M40403(M组)分别作用于体外原代培养第6天的神经元24 h,检测神经元ROS生成?凋亡细胞百分比及促凋亡蛋白Bax表达?结果:与C组相比,K组神经元ROS生成?凋亡细胞百分比?Bax表达分别是其1.7?4.2及2.0倍(P < 0.05);与C组相比,M组神经元ROS生成?凋亡细胞百分比?Bax表达差异无统计学意义?结论: ROS介导大剂量氯胺酮致原代培养皮层神经元凋亡?  相似文献   

2.
目的:探讨Resveratrol对高糖培养大鼠肾小球系膜细胞氧化应激和p27蛋白表达的影响?方法:体外培养大鼠肾小球系膜细胞,分为正常对照组(NC组,葡萄糖浓度5.6 mmol/L)?Resveratrol组(Res组,葡萄糖浓度5.6 mmol/L+ Resveratrol 20 μmol/L)?高糖组(HG组,葡萄糖浓度30mmol/L)和高糖+Resveratrol组(HG+Res组,葡萄糖浓度30 mmol/L+ Resveratrol 20 μmol/L),各组细胞分别培养72 h,用比色法测定细胞上清液丙二醛(malondialdehyde,MDA)含量,流式细胞仪检测细胞内活性氧(reactive oxygen species,ROS)含量,蛋白含量/细胞数比值评估系膜细胞大小,Western blot法检测细胞内p27蛋白表达的变化?结果:①与NC组相比,HG刺激后大鼠肾小球系膜细胞内MDA?ROS含量均明显上调(P < 0.01);与HG组相比,HG+Resveratrol干预后大鼠肾小球系膜细胞内MDA?ROS含量均降低(P < 0.05)?②与NC组相比,HG刺激72 h后,大鼠肾小球系膜细胞肥大?p27蛋白表达明显增加(P < 0.01);与HG组相比,HG+Resveratrol干预后大鼠肾小球系膜细胞细胞肥大减轻?p27蛋白表达减少(P < 0.05)?Res组和NC组之间p27蛋白表达无统计学意义(P > 0.05)?结论:Resveratrol可能通过缓解高糖诱导系膜细胞的氧化应激?抑制p27蛋白高表达,减轻糖尿病肾脏疾病早期的肾脏肥大?  相似文献   

3.
 【目的】 观察瘦素对缺氧复氧人肝脏细胞(L02)的肝功能保护和丙二醛(MDA)、超氧化物歧化酶(SOD)的影响。【方法】 将L02细胞分别分为正常对照组、单纯缺氧12 h复氧组和缺氧12 h复氧加不同浓度的瘦素(分别为100、200、400、800和1 600 μg/L)干预组,取细胞上清液检测谷丙转氨酶(ALT)、谷草转氨酶(AST)、MDA的浓度和SOD活性;电镜检测细胞凋亡的形态学改变。 【结果】 ①与正常对照组相比,L02细胞经缺氧12 h复氧培养后,ALT和AST浓度明显升高(P < 0.01),加用不同浓度瘦素干预组ALT和AST浓度较单纯缺氧12 h复氧组下降(P < 0.01);②与正常对照组相比,L02细胞经缺氧12 h复氧培养后,MDA浓度明显升高(P < 0.05),SOD活性下降(P < 0.05),加用不同浓度瘦素干预组MDA浓度较单纯缺氧12 h复氧组下降(P < 0.05);SOD活性上升(P < 0.05);③电镜检测单纯缺氧复氧后细胞呈现明显凋亡形态学改变,加用瘦素100 μg/L处理细胞组细胞仅轻度改变。【结论】 瘦素对缺氧复氧培养导致L02肝细胞的细胞损伤有一定的保护作用;可能与瘦素抑制氧自由基生成,减少脂质过氧化有关。  相似文献   

4.
目的 探讨灯盏花素对谷氨酸(Glu)体外诱导原代培养大鼠皮质神经元损伤的作用及机制.方法 通过MTT法观察灯盏花素对Glu诱导神经元损伤的细胞存活率的影响,并结合超氧化物歧化酶(SOD)和丙二醛(MDA)生化测试及细胞钙影像方法探讨相关作用机制.结果 灯盏花素呈质量浓度依赖性提高Glu诱导神经元损伤细胞的存活率,并拮抗由Glu诱导的[Ca2 ];升高、MDA生成,提高SOD活性.结论 灯盏花素对Glu体外诱导大鼠皮质神经细胞损伤具有保护作用,可能与减轻胞内Ca2 超载、提高神经细胞抗氧化能力有关.  相似文献   

5.
目的:探讨黄芩素对雷公藤甲素诱导的大鼠卵巢颗粒细胞凋亡的保护作用。方法:收集大鼠卵巢颗粒细胞,经原代培养24 h后,用雷公藤甲素损伤大鼠卵巢颗粒细胞;干预组添加终浓度分别为50、100、200μmol/L的黄芩素,对照组添加相同体积的二甲基亚砜(DMSO)溶液,继续培养24 h(或以上)。采用MTT法测定卵巢颗粒细胞活力,流式细胞术Annexin V/PI双染色检测细胞凋亡,Western blot法检测与细胞凋亡相关蛋白的表达情况;测定各组卵巢颗粒细胞超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)的活性及丙二醛(MDA)含量,评价抗氧化能力。结果:雷公藤甲素可显著降低大鼠卵巢颗粒细胞活力,诱导细胞凋亡,并使SOD和GSH-Px活性降低,MDA含量增加;雷公藤甲素处理细胞的同时添加黄芩素干预后,卵巢颗粒细胞相对活力增加,细胞凋亡减弱,胞内SOD和GSH-Px活性升高,MDA含量降低。Western blot结果显示,经过雷公藤甲素处理,卵巢颗粒细胞中促凋亡蛋白Bax表达量显著上升,抗凋亡蛋白Bcl-2表达量明显降低;黄芩素干预后可以显著下调Bax表达量,上调Bcl-2表达量。结论:黄芩素可明显改变卵巢颗粒细胞的抗凋亡及抗氧化能力,对雷公藤甲素诱导的细胞凋亡起保护作用。  相似文献   

6.
目的 建立原代神经元缺氧缺血性脑损伤细胞模型,探讨cZNF292对脑缺血损伤后神经元细胞氧化及凋亡的影响。方法 首先选取胎鼠原代神经元细胞,采用10mmol/LNa2S2O4和无糖培养基处理细胞4 h,培养24 h后复氧,建立脑缺血缺氧(oxygen and glucose deprivation,OGD)细胞模型。通过细胞骨架蛋白和β3-微管蛋白免疫荧光染色观察原代神经元细胞形态变化,FITC标记鬼笔环肽观察不同浓度Na2S2O4对原代神经元细胞存活率的影响。ELISA检测活性氧(reactive oxygen species,ROS)、丙二醛(Malodialdehyde,MDA)、超过氧化物歧化酶(supeoxide dismutase,SOD)和乳酸脱氢酶(lactate dehydrogenase,LDH)的表达水平检测。Western Blot检测Caspase 3及细胞周期蛋白G1(cyclin G1, CCNG1)的表达水平。结果 成功建立缺氧缺血性脑损伤细胞模型和cZNF292敲减细胞模型,并发现4h缺氧时间后复氧,10mmol/L的Na2S2O4对原代神经元的生长抑制率最高。cZNF292表达水平在复氧15h后最高。OGD细胞模型使胎鼠体内血清ROS和MDA浓度呈上升趋势, SOD和LDH浓度呈下降趋势。敲减cZNF292后,胎鼠体内血清ROS和MDA浓度呈下降趋势, SOD和LDH浓度呈上升趋势(P<0.05)。敲减cZNF292可使Caspase 3和CCNG1表达水平下降。结论 脑缺血可以诱导原代神经元细胞增加cZNF292表达,敲减cZNF292可以减少原代神经元细胞在缺血缺氧环境下发生氧化损伤,抑制原代神经元细胞凋亡及增殖。  相似文献   

7.
铅对大鼠海马神经元胞质PKC活性的影响   总被引:3,自引:0,他引:3  
目的 :观察不同低浓度醋酸铅不同染铅时间对大鼠海马神经元原代培养细胞胞质蛋白激酶C(PKC)活性及神经元细胞生长的影响。方法 :出生 4~ 8dWistar大鼠海马神经元原代细胞培养 ,显微照相 ,并不同时间不同浓度染铅 ,应用改良的Takai法测定PKC活性的变化。结果 :0 .1~ 1.0 μmol/L染铅 ,PKC活性依浓度依赖方式被激活 ,染铅浓度 >1.0 μmol/L ,PKC活性下降 ;染铅 15min后PKC活性升高并保持。低浓度醋酸铅并可抑制原代神经元细胞生长 ,呈浓度依赖方式。结论 :低浓度醋酸铅可持续激活大鼠海马神经元原代培养细胞胞质PKC ,抑制原代神经元细胞生长。  相似文献   

8.
目的:建立三丁基氯化锡(TBTC)诱导的新生雌性大鼠下丘脑神经元细胞凋亡模型,并探讨相关机制。方法:取新生24 h以内的雌性SD大鼠,分离下丘脑神经元细胞进行原代培养。免疫荧光染色法鉴定下丘脑神经元纯度后,分别暴露于含不同浓度TBTC(0、100、150、200、250、300μg/L)的培养基中。孵育24 h后,CCK-8检测各组细胞存活率,流式细胞仪检测各组细胞凋亡情况,Hoechst 33258染色观察凋亡细胞核形态,透射电镜观察细胞形态的改变,Western blot检测凋亡相关蛋白JNK、p-JNK的表达。结果:免疫荧光染色鉴定神经元纯度约为92.23%。与TBTC 0μg/L组相比,各浓度TBTC干预24 h对下丘脑神经元细胞的生长均有抑制作用,其相对存活率均显著降低(P0.01),且呈浓度依赖性;与TBTC 0μg/L组相比,不同浓度的TBTC作用24 h后,下丘脑神经元细胞均出现不同程度的细胞凋亡,其细胞凋亡率均显著升高(P0.01),且呈浓度依赖性。Hoechst 33258染色显示,TBTC 150μg/L组下丘脑神经元细胞核呈致密浓染的高强度蓝色荧光,细胞核出现明显的凋亡形态。透射电镜观察显示,TBTC 150μg/L组出现细胞核固缩并发生裂解,染色质边集化,可见多个凋亡小体;与TBTC 0μg/L组相比,TBTC 150μg/L组细胞p-JNK蛋白表达显著增多,p-JNK/JNK蛋白表达比值显著上调(P0.01)。结论:TBTC 150μg/L干预24 h可诱导下丘脑神经元细胞凋亡,其损伤机制与上调p-JNK蛋白表达有关。  相似文献   

9.
烟碱拮抗秋水仙碱诱导大鼠大脑皮质神经元凋亡的作用   总被引:1,自引:0,他引:1  
[目的]研究烟碱对皮质神经元的保护作用.[方法]在培养至第6天的皮质神经元中以不同浓度(1μmol/L,10 μmol/L,100 μmol/L)烟碱预孵2 h,再加入0.1 μmol/L秋水仙碱作用24 h.通过相差显微镜形态学观察,Hoechst33258核荧光染色进行凋亡率计数和测定乳酸脱氢酶相对释放量(LDH)的实验,再测试10 μmol/L预孵不同时间(0.5,2,8)h的烟碱对秋水仙碱诱导大鼠大脑皮质神经元凋亡的作用.[结果]秋水仙碱可诱导皮质神经元调亡,烟碱可拮抗秋水仙碱的此种作用.其中10 μmol/L烟碱预孵2 h保护作用最强.[结论]烟碱可拮抗秋水仙碱诱导大鼠大脑皮质神经元凋亡的作用.  相似文献   

10.
目的:观察不同浓度尼卡地平对谷氨酸诱导大鼠海马星形胶质细胞损伤的影响。方法:取新生2~3 dSD大鼠海马星形胶质细胞,原代纯化培养3周。将细胞随机分6组(n=9):正常对照组(C组)加入Hanks液;谷氨酸组(G组)加入谷氨酸至终浓度500μmol/L;尼卡地平组(N组)加入尼卡地平至终浓度10μmol/L;GN1、GN2、GN3组先加入谷氨酸至终浓度500μmol/L,10 m in后分别加入尼卡地平至终浓度1、5、10μmol/L。培养30 m in后检测海马星形胶质细胞内游离钙浓度([Ca2+]i),继续培养24 h检测各组细胞凋亡及丙二醛(MDA)含量、超氧化物歧化酶(SOD)和谷胱甘肽(GSH)活性,免疫荧光细胞化学法检测胶质纤维酸性蛋白(GFAP)表达并观察细胞形态学的改变。结果:与C组比较,G组和GN1组细胞大量凋亡,未凋亡的星形胶质细胞增生肥大;GFAP表达、[Ca2+]i及MDA含量升高,SOD和GSH活性均降低(P<0.01);G、GN1组间比较差异无统计学意义(P>0.05)。与G组比较,GN2组和GN3组凋亡明显减少,细胞形态正常;GFAP表达、[Ca2+]i及MDA含量降低,SOD和GSH活性升高。结论:尼卡地平通过抑制细胞内钙超载和脂质过氧化反应,清除自由基而抑制了谷氨酸诱导海马星形胶质细胞损伤,其抑制程度与剂量有关。  相似文献   

11.
Objective To observe blood pressure change with age in salt-sensitive teenagers whose salt sensitivity were determined by repeated testing.Methods Salt sensitivity was determined through intravenous infusion of normal saline combined with volume-depletion by oral diuretic furosemide in 55 teenagers. After five years, salt sensitivity was re-examined and subject blood pressure was followed up. Blood pressure changes in salt-sensitive teenagers were compared to that of non-salt sensitive teenagers over five years.Results After 5 years, the repetition rate of salt sensitivity determined by intravenous saline loading is 92.7%. In teenagers with salt sensitivity on the baseline, both the systolic blood pressure increments and increment rates were much higher than non-salt sensitive teenagers (12.7±12.1 mmHg vs. 2.8±5.2 mmHg, P< 0.01; 12.2%± 12.0% vs. 2.5% ±4.4%, P< 0.001,respectively). There was a similar trend for diastolic blood pressure (8.4 ± 6.4 mmHg vs. 3.7 ± 6.4 mmHg, P = 0.052; 13.2% ±10.6 % vs. 6.8%± 10.1%, P = 0.053, respectively).Conclusions Salt sensitivity determined by intravenous saline loading showed good reproducibility. Blood pressure increments with age were much higher in salt-sensitive teenagers than non-salt sensitive teenagers, especially in terms of systolic blood pressure.  相似文献   

12.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

13.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

14.
Increasing maternal age is the only etiological factor unequivocally linked to Down's syndrome in humans. The occurrence rate of newborns with Down's syndrome is about 1/220 in women over 35 years old. However, the occurrence rate in embryos fertilized in vitro, of the elder woman is unclear. Using FISH we screened the number of chromosome 21 in preimplanted embryos of 5 elderly women (average age, 38.4 years) to study the feasibility and necessity of screening trisomy 21 in embryos in patients over 35 years old at the in vitro fertilization (IVF) center.  相似文献   

15.
Real-time three-dimensional echocardiography (RT3DE)is a new ultrasound technique that enables dynamic threedimensional visualization and quantification of the heart in real time. Investigation of feasibility and methodology of RT3DE in determining left ventricular (LV) and right ventricular (RV) volumes, RT3DE was performed in 35 normal adults using Philips SONOS 7500 system with a 2-4 MHz matrix array transducer. The 60°×60° "pyramid" volume database was obtained and analyzed on a TomTec echo workstation. Both LV and RV volumes were calculated with four 3DE methods (i.e. apical 2, 4, 8, and 16-plane) through manually tracing ventricular endocardial borders in end diastole and end systole. Stroke volumes were then calculated. LV volume was also measured by 2DE Simpson's rule using GE VIVID 7 ultrasound machine.  相似文献   

16.
A clinical guideline for the therapeutic interventions of integrative medicine may be defined as a written document which states a series of recommendations on therapeutic interventions of integrative medicine for a special disease or condition. The guideline may provide assistance to medical professionals in making clinical decisions aimed at improving the clinical outcome of patients and reducing the costs of medical care(~'4~. Recommendations issued by a guideline should be based on the best available evidence in both Western and Chinese medicine. For fulfilling this purpose, the development of clinical guidelines for therapeutic interventions in the field of integrative medicine should follow scientific principles and undergo a rigorous processes.  相似文献   

17.
Objective:To probe into the influence of changes of ovarian hormones on the pathogenesis of the specific sub-type premenstrual syndrome(PMS)and reveal partial microcosmic mechanisms of adverse flow of liver-qi.Methods:Estradiol(E2)and progesterone(P)levels in serum were determined at different phases of menstrual cycle by radioimmunoassay.Results:In the group of PMS with adverse flow of liver-qi.the secretive peak value Of E2 and P at the follicular phase significantly decreased,and the secretive peak value at the luteal phase did not come into being.Conclusions:Low E2 and P secretive peak at the follicular phase and absence of secretive peak at the luteal phase is one of the microcosmic mechanisms of PMS with adverse flow of liver-qi.One of the pathophysiologic mechanisms of specific sub-type PMS is probably the continuous low level of E2and P.  相似文献   

18.
Journal of Nanjing Medical University (English Edition) JNMU, sponsored by Nanjing Medical University, was established in 1987. It is a bimonthly comprehensive English medical journal published locally and abroad.Since 2007, Journal of Nanjing Medical University (English Edition )was granted Elsevier the full publishing and distribution rights worldwide for the Electronic Edition, excluding the People's Republic of China.  相似文献   

19.
Objective To measure Derpl and Blot5 allergen levels in asthmatics' homes in Hongkong.Methods Seventy houses were enrolled for a mite indoor environment study. Dust samples were obtained from two sites of each patients' house: bed and floor. Derpl and Blot5 levels were quantified by a two-site monoclonal antibody-based ELISA technique.Results The levels of Derpl allergens found in bed (geometric mean (GM) 3.43 μg/g of dust; 95%CI, 1.89-4.96 μg/g)and on the floor (GM 1.12 μg/g of dust; 95%CI, 0.71-1.53 μg/g) indicated significant differences (P=0.005). However, the levels of Blot5 allergens found in bed (GM 19.00 μg/g of dust; 95%CI, 0.89-38.90 μg/g) and on the floor (GM 6.14 μg/g of dust; 95%CI, 0.40-11.90 μg/g) showed no statistically significant difference. In addition, in regards to the exposure index for Derpl and Blot5 allergens found in bed and on the floor, 17.6% in bed and 8.6% on the floor had levels of Blot5 ≥ 10 μg/g of dust, higher than those obtained for Derp1 (7.2% and 0% in bed and on the floor respectively, P< 0.05); higher percentages in bed and on the floor (25.0% and 35.7%) were observed for levels of Blot5 =0 μg/g of dust as compared with Derpl in bed and on the floor (4.3% and 14.5% respectively, P< 0.05).Conclusions Derpl and Blot5 are the major allergens found in this regional study, Blot5 is a more potent allergen in Hongkong, probably reflecting the high level of exposure to Blomia tropicalis (Bt). Bt and Dermatophagoides pteronyssinus (Dp) allergens should be included for precise diagnosis and effective immuno-therapeutic treatment of mite allergy in Hongkong.  相似文献   

20.
ANTI-PROLIFERATION EFFECT OF ORIDONIN ON HL-60 CELLS AND ITS MECHANISM   总被引:4,自引:0,他引:4  
Objcetive To investigate the anti-proliferation effect of oridonin on leukemic HL-60 cells and its mechanism. Methods HL-60 cells in vitro in culture medium were given different concentrations of oridonin. The inhibitory rate of cells were measured by microculture tetrazolium (MTT) assay, cell apoptotic rate was detected by flow cytometry (FCM), morphology of cell apoptosis was observed by hoechst 33258 fluorescence staining, and the activity of telomerase was detected using telomere repeat amplification protocol (TRAP) PCR-ELISA before and after apoptosis occurred. Results Oridonin could decrease telomerase activity, inhibit growth of HL-60 cells, and cause apoptosis significantly. The suppression was both in time- and dose-dependent manner. Marked morphological changes of cell apoptosis including condensation of chromatin and nuclear fragmentation were observed clearly by hoechst 33258 fluorescence staining especially after cells were treated 48-60 hours by oridonin. Conclusions Oridonin has apparent anti-proliferation and apoptotic effects on HL-60 cells in vitro, decreasing telomerase activity of HL-60 cells may be one of its most important mechanisms. These results will provide strong laboratory evidence of oridonin for clinical treatment of acute leukemia.  相似文献   

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