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1.
目的 探究去铁胺对糖尿病大鼠心肌细胞铁死亡通路的影响。方法 雄性SD大鼠24只,采用数字表法随机分为3组,即正常组(N组)、糖尿病组(D组)和去铁胺处理组(C组),每组各8只。采用腹腔注射链脲佐菌素(STZ)55mg/kg建立糖尿病模型,0.2mg/g去铁胺(DFO)连续腹腔注射1周。观察各组在实验第1天、3天、10天、17天、24天、31天血糖值和体质量的变化,Western blot法测定心肌细胞微管相关蛋白3Ⅱ(LC3Ⅱ)、铁蛋白重链(FTH)和核受体共同激活因子4(NCOA4)的表达,血液生化仪测血浆cTnI浓度,普鲁士蓝染色和HE染色观察心肌的病理学改变。结果 与N组比较,D组和C组血糖值升高,体质量减轻,D组cTnI、心肌细胞FTH、NCOA4、LC3Ⅱ含量升高(P<0.05);与D组比较,C组cTnI、血糖值、铁蛋白自噬相关蛋白均下降(P<0.05),细胞内含铁小粒数目明显减少。结论 去铁胺处理1周可降低糖尿病大鼠血糖水平,降低cTnI浓度,抑制心肌细胞内NCOA4的表达,抑制铁死亡通路,改善心肌细胞损伤。  相似文献   

2.
目的探讨依维莫司(EVE)联合铁死亡诱导剂(RSL3)诱导肺腺癌细胞铁死亡的作用及机制。方法人肺腺癌细胞系PC9和H1299分为对照组(药物浓度为0)、不同浓度EVE组、不同浓度RSL3组和EVE+RSL3组,加入相应药物培养。检测铁抑制素1(Fer-1)效果时再加入Fer-1。采用噻唑蓝溴化四唑法检测各组细胞存活率,采用丙二醛(MDA)检测法、铁比色分析法分别检测细胞内MDA、亚铁离子(Fe2+)相对水平;采用Westernblot法检测磷酸化哺乳动物雷帕霉素靶蛋白(p-mTOR)及谷胱甘肽过氧化物酶(GPX)4相对表达量。结果相比对照组,不同浓度EVE组细胞存活率无明显变化(P>0.05);相比RSL3组,EVE+RSL3组细胞存活率显著降低(P<0.01)。相比未加Fer-1的EVE+RSL3组,加入Fer-1后EVE+RSL3组细胞存活率显著升高(P<0.05)。相比其他3组,EVE+RSL3组细胞内Fe2+和MDA相对水平均显著升高(均P<0.05),p-mTOR和GPX4蛋白相对表达量均显著降低(均P<0.05);相比RSL3组,EVE+RSL3组p-mTOR和GPX4蛋白相对表达量均显著降低(均P<0.01)。结论EVE联合RSL3可能通过mTOR/GPX4通路诱导肺腺癌细胞发生铁死亡。  相似文献   

3.
李慧霞  尤伟波  陈丽  王建平 《浙江医学》2022,44(10):1038-1041,1049
目的探讨谷胱甘肽过氧化物酶4(GPX4)在雷公藤内酯酮(TN)激活结肠癌细胞铁死亡中的作用。方法将体外培养结肠癌细胞株HCT116分为5组,即对照组、TN组、铁死亡抑制剂Feroptosis-1(Fer-1)组、阴性载体组、GPX4过表达组。对照组细胞不作任何处理,其余4组细胞均加入15.0nmol/L的TN处理48h,其中Fer-1组用2滋mol/LFer-1预处理2h,阴性载体组、GPX4过表达组细胞分别用阴性慢病毒载体和GPX4过表达载体转染48h。比较5组HCT116死亡细胞比例,细胞内谷胱甘肽(GSH)、活性氧(ROS)、丙二醛(MDA)含量以及GPX4蛋白表达水平。结果5组HCT116死亡细胞比例,细胞内GSH、ROS、MDA含量以及GPX4蛋白表达水平比较,差异均有统计学意义(均P<0.05)。与对照组比较,TN组死亡细胞比例及细胞内ROS、MDA含量均明显增加(均P<0.05),GSH含量及GPX4蛋白表达水平均明显减少(均P<0.05);与TN组比较,Fer-1组死亡细胞比例及细胞内ROS、MDA含量均明显减少(均P<0.05),GSH含量及GPX4蛋白表达水平均明显增加(均P<0.05);与阴性载体组比较,GPX4过表达组死亡细胞比例及细胞内ROS、MDA含量均明显减少(均P<0.05),GSH含量及GPX4蛋白表达水平均明显增加(均P<0.05)。结论TN通过抑制GPX4激活结肠癌细胞铁死亡,从而抑制癌细胞增殖。  相似文献   

4.
目的 研究杆状病毒IAP重复序列蛋白6(BIRC6)在肾癌组织中的表达,并探讨BIRC6沉默对786-O细胞凋亡和自噬的影响。方法 收集2016年2月~2018年12月梅州市人民医院肾癌手术切除标本20例,通过免疫组化检测BIRC6蛋白在肾癌组织中的表达水平。将肾癌786-O细胞分为两组,对照siRNA组和BIRC6 siRNA组;通过lipofectamine 2000将BIRC6小干扰RNA(BIRC6-siRNA)及其对照siRNA(con-siRNA)转染到肾癌786-O细胞,Western blot检测转染后BIRC6蛋白表达水平,CCK8和流式细胞术分别检测BIRC6-siRNA和5-FU人肾癌786-O细胞活力和凋亡的影响,Western blot检测细胞自噬相关蛋白Beclin和LC3A/B的表达水平。结果 免疫组化结果显示BIRC6蛋白在肾癌组织中的表达显着高于正常肾组织,转染BIRC6-siRNA后786-O细胞的BIRC6蛋白表达水平显著降低。12.5、25、50、100和200 μg/mL的5-FU诱导786-O细胞后,BIRC6-siRNA组细胞增殖抑制率显著高于con-siRNA组,差异具有统计学意义(P<0.01);流式检测结果显示,BIRC6-siRNA组肾癌786-O细胞凋亡率显著高于con-siRNA组,差异具有统计学意义(P<0.01);BIRC6-siRNA组肾癌786-O细胞Beclin和LC3A/B蛋白表达显著低于con-siRNA组。结论 siRNA干扰BIRC6能够抑制肾癌786-O细胞自噬,促进5-FU诱导的细胞凋亡,促进肾癌786-O细胞对5-FU的敏感性。  相似文献   

5.
【摘要】 铁自噬(ferritinophagy)是一种调节细胞内铁代谢的选择性自噬,由核受体共激活因子4(NCOA4)介导细胞内铁蛋白转运到自噬溶酶体中降解释放出游离铁,用于多种铁依赖的生理过程。正常生理情况下铁自噬维持着细胞内铁元素的平衡。当铁自噬过度激活时,细胞内过量的铁沉积诱导谷胱甘肽(GSH) 耗竭以及谷胱甘肽过氧化物酶 4(GPX4) 的表达减少,导致细胞膜结构崩溃和破裂,最终引起细胞的铁死亡(ferroptosis)。已有研究表明,氧化应激、炎症、兴奋性毒素和凋亡在中枢神经系统损伤的病理生理过程中起着重要作用。近年来,对铁死亡这一以铁依赖性脂质过氧化积累为特征的调节性细胞死亡与中枢神经系统疾病的关系研究越来越多。本文就铁自噬与铁死亡在中枢神经系统疾病中的作用研究进展进行综述。  相似文献   

6.
目的 观察隐丹参酮在人肝癌HepG2细胞铁死亡中的作用。方法 体外培养HepG2细胞,采用CCK-8法检测细胞活力并计算半数抑制浓度(IC50),倒置相差显微镜观察细胞形态,DCFH-DA探针检测活性氧(ROS)水平变化,谷胱甘肽(GSH)测定试剂盒检测GSH水平变化,Western blot法检测铁死亡相关蛋白胱氨酸谷氨酸逆转运体轻链蛋白(xCT)和谷胱甘肽过氧化物酶4(GPX4)蛋白表达。以铁死亡抑制剂Ferrostain-1(Fer-1)、铁螯合剂去铁胺(DFO)、ROS清除剂乙酰半胱氨酸(NAC)进行干预,同样检测细胞活力、ROS水平、GSH水平及xCT和GPX4表达。结果 隐丹参酮可显著抑制HepG2细胞活力,并引起HepG2细胞形态学变化和死亡,IC50为93.73 μmol/L。隐丹参酮可显著诱导HepG2细胞ROS累积,降低GSH水平,并下调xCT和GPX4表达。Fer-1、DFO、NAC均可不同程度恢复隐丹参酮引起的HepG2细胞活力下降。Fer-1可抑制隐丹参酮诱导的ROS累积,并恢复GSH水平及xCT和GPX4表达。 结论 隐丹参酮可能通过抑制GPX4和xCT表达使HepG2细胞中ROS累积,导致细胞发生铁死亡。  相似文献   

7.
目的 观察铁死亡在盲肠结扎与穿孔(CLP)法诱导的脓毒症小鼠心肌损伤中的作用,并探讨脂钙蛋白-2(Lcn2)在铁死亡中的可能作用。方法 选取8周龄雄性C57BL/6小鼠,采用CLP法诱导脓毒症心肌损伤模型。小鼠随机分为3组(10只/组):假手术组、脓毒症组(CLP,小鼠接受CLP手术)、脓毒症+铁死亡抑制剂Ferrostain-1组(CLP+Fer-1,小鼠腹腔注射浓度为5 mg/mL的Fer-1 5 mg/kg,1 h后接受CLP手术)。各组小鼠术后24 h通过超声心动图检测小鼠心功能。H&E染色观察心肌损伤,透射电镜观察心肌纤维细微结构和线粒体的变化;ELISA法测定血清中炎症因子肿瘤坏死因子-α(TNF-α)水平;组织铁试剂盒测定心肌组织铁含量的变化;Western blot法检测心肌组织中Lcn2蛋白和铁死亡相关蛋白谷胱甘肽过氧化物酶4(GPX4)和铁死亡抑制蛋白1(FSP1)的表达变化。结果 与假手术组相比,CLP术后24 h,脓毒症小鼠心脏收缩与舒张功能减弱,左心室射血分数(LVEF%)、左心室缩短分数(LVFS%)和左心室舒张末期内径(LVIDd)降低(P<0.05);左心室收缩期末期内径(LVIDs)升高(P<0.05)。与CLP组相比,CLP+铁死亡抑制剂Fer-1组LVEF%、LVFS%和LVIDd升高(P<0.05);LVIDs降低(P<0.05)。光镜下观察到CLP小鼠心肌纤维排列不整齐,部分变性,有炎症细胞浸润,间质水肿,横纹模糊,红细胞渗出。透射电镜观察到部分线粒体嵴减少,外膜破裂,部分线粒体变小,膜密度增高。CLP+Fer-1组小鼠心肌形态学有改善,线粒体损伤减轻。与假手术组相比,CLP组血清TNF-α水平、心肌组织铁含量、Lcn2蛋白表达升高(P<0.01),GPX4、FSP1蛋白表达降低(P<0.01)。与CLP组相比,CLP+Fer-1组血清TNF-α水平、心肌组织铁含量、和Lcn2蛋白表达降低(P<0.05);GPX4、FSP1蛋白表达升高(P<0.05)。结论 来源于GPX4、FSP1不同途径的铁死亡参与CLP引起的脓毒症性心肌损伤的发生,抑制铁死亡可减轻脓毒症心肌损伤,Lcn2可能参与其中。  相似文献   

8.
王卓  陈俊  郝杰  彭志财  付福建  陈吉  陈勇 《西部医学》2021,33(8):1111-1114,1120
目的 探讨去铁胺(DFO)对缺氧诱导因子-1α(HIF-1α)/血管内皮生长因子(VEGF)表达的调控作用,以及因此对脊髓损伤修复的促进作用。〖HTH〗方法 对40只SD大鼠进行脊髓损伤造模,并随机分为4组:假手术组10只,对照组10只,DFO 30 mg/Kg腹腔注射组(DFO 30组)10只以及100 mg/Kg腹腔注射组(DFO 100组)10只。术后观察大鼠行为学功能,脊髓病理学改变以及HIF-1α/VEGF表达情况。结果 术后1周开始,DFO两组大鼠行为学功能较对照组明显改善(均P<0.05);而术后2周开始,DFO 100组大鼠行为学功能较对照组进一步明显改善,且DFO 100组改善程度优于DFO 30组(均P<0.05)。术后4周,对照组大鼠脊髓组织明显减少,内仅有少量HIF-1α/VEGF表达,而DFO 30组髓鞘残余面积相对于对照组明显恢复,DFO 100组髓鞘残余面积明显高于DFO 30组(均P<0.05);DFO 30组HIF-1α/VEGF表达量明显高于对照组,DFO 100组HIF-1α/VEGF表达量较DFO 30组更明显(均P<0.05)。结论 DFO通过调控HIF-1α/VEGF表达有效促进脊髓损伤修复,大剂量DFO应用可能具有更好的脊髓损伤修复效果。  相似文献   

9.
目的:研究表明,Wnt信号通路与肾癌发生、发展密切相关。文中拟通过观察小分子Wnt信号抑制剂15-氧代绣线菊内酯对人肾癌786-0细胞增殖、迁移、细胞凋亡和周期等恶性表型的影响,探讨15-氧代绣线菊内酯对肾癌细胞的体外抗肿瘤效应。方法实验分为:低、中、高浓度15-氧代绣线菊内酯组(终浓度分别为1.25、2.50和5.00μmol/L的15-氧代绣线菊内酯)及对照组(DMSO),各组分别处理786-0细胞株,分别运用四甲基偶氮唑蓝(MTT)比色法和划痕损伤实验分别观察细胞增殖、迁移的变化,采用Annexin V-FITC/PI双染色及PI染色流式细胞术检测细胞凋亡及周期的变化情况。结果15-氧代绣线菊内酯能明显抑制肾癌786-0细胞株的增殖,半数抑制浓度为1.088μmol/L,降低细胞迁移距离(P<0.05);低、中、高浓度15-氧代绣线菊内酯组处理786-0细胞36 h 后,细胞凋亡率[(12.17±0.56)%、(18.54±1.07)%、(50.74±1.28)%]较对照组[(7.85±0.42)%]明显升高(P<0.05),且随药物浓度增加,细胞凋亡率逐步升高。15-氧代绣线菊内酯能明显增加G 2/M期的细胞,减少G0/G1期的细胞(P<0.05)。结论15-氧代绣线菊内酯在体外细胞学水平能够显著抑制786-0细胞的增殖和迁移,诱导细胞凋亡,可能是一种潜在的抗肿瘤药物。  相似文献   

10.
目的:研究舒尼替尼引起的肾癌细胞出现细胞自噬的机制。方法:以肾癌细胞系ACHN细胞为细胞模型,利用3-(4,5-二甲基)-5-(3-羧甲基苯环)-2-(4-硫基苯)-2H 四唑盐复合物[3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium,innersalt,MTS]检测法观察舒尼替尼对ACHN 细胞活性的影响;应用RNA干扰技术敲降自噬相关蛋白Beclin1和微管相关蛋白1轻链3融合蛋白(microtubule associated protein 1 light chain 3 fusion protein, LC3)检测自噬与舒尼替尼引起的细胞凋亡。使用电子显微镜和荧光显微镜观察在舒尼替尼作用下自噬体的形成;蛋白质免疫印迹检测舒尼替尼对LC3-Ⅱ的积累,自噬相关信号通路蛋白激酶B(protein kinase B, PKB/Akt)、哺乳动物雷帕霉素受体( mammalian target of rapamycin, mTOR) 及聚腺苷二磷酸核糖聚合酶( poly ADP-ribose polymerase,PARP) 切割的变化和过量表达,以及敲降Akt检测诱导自噬的变化。结果: 舒尼替尼能显著抑制ACHN的细胞活性,这种作用具有时间和浓度依赖性;敲降自噬相关蛋白Beclin1和LC3减少自噬可改变舒尼替尼引起PARP的切割;透射和荧光显微镜观察结果表明,舒尼替尼引起细胞自噬体明显增加;蛋白质免疫印迹结果显示舒尼替尼增加自噬同时减少了Akt/mTOR的磷酸化。过量表达持续活化的Akt抑制了该化合物引起的自噬,而敲降Akt可促进自噬发生。mTOR抑制剂雷帕霉素能上调舒尼替尼引起的自噬并促进细胞活性的丢失。结论:舒尼替尼通过抑制Akt/mTOR信号通路促进肾癌细胞ACHN的自噬,其诱导的自噬与凋亡有关。  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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