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1.
马增翼  许刚  于文光  田克立 《重庆医学》2016,(11):1473-1476
目的:探讨过氧化物酶体增殖物激活受体γ(PPARγ)激动剂罗格列酮对急性胰腺炎小鼠肝损伤的影响并对其机制进行初步研究。方法72只健康雄性昆明小鼠分为3组,急性胰腺炎组(AP组)、罗格列酮预处理组(AP‐ROS组)和生理盐水组(N S组),每组24只。分别于建模后6 h、12 h和24 h处死小鼠,全自动生化分析仪检测血清淀粉酶、丙氨酸氨基转移酶(A L T )和天门冬氨酸氨基转移酶(AST )水平。运用RT‐PCR方法检测肝脏组织NF‐κB和PPARγmRNA表达,应用Western blot技术检测肝脏组织PPARγ和NF‐κB p65蛋白表达。结果小鼠血清淀粉酶、ALT 和AST水平在相对应的各时间点AP组比NS组明显升高(P<0.01),AP‐ROS组较AP组明显降低(P<0.01)。AP组肝脏组织PPARγmRNA和蛋白表达在造模后6 h和12 h均低于NS组(P<0.05);AP‐ROS组PPARγmRNA和蛋白表达在各时间点均明显高于AP组和NS组(P<0.01)。AP组肝脏组织NF‐κB mRNA和NF‐κB p65蛋白表达水平在各时间点与AP‐ROS组和NS组相比较均升高(P<0.01)。结论 NF‐κB与小鼠急性胰腺炎肝损伤有明显关系,PPARγ在肝损伤中的表达受到抑制;罗格列酮在AP早期能增强PPARγ表达,抑制NF‐κB的表达。  相似文献   

2.
目的:探讨双醋瑞因对碘乙酸钠(MIA)诱导的骨关节炎软骨细胞的保护作用。方法实验分为正常组,模型组(4μMMIA),双醋瑞因低、中、高剂量组(1、10、100μM)。噻唑蓝(MTT)法检测各组软骨细胞活力;分光光度法检测各组半胱氨酸天冬氨酸蛋白酶‐3(Caspase‐3)活性;Westernblot分析核因子‐κB(NF‐κB)信号通路激活情况及下游靶蛋白Bax、Bcl‐2、基质金属蛋白酶‐9(MMP‐9)、基质金属蛋白酶‐13(MMP‐13)的表达量。结果1、10、100μM双醋瑞因能提高MIA诱导的大鼠软骨细胞的活力并降低Caspase‐3活性(P<0.05);10、100μM双醋瑞因能降低IκBα及NF‐κB磷酸化水平,并下调Bax、MMP‐9及MMP‐13的表达,上调Bcl‐2的表达(P<0.05)。结论双醋瑞因能够抑制MIA诱导的软骨细胞凋亡与细胞外基质降解,与NF‐κB信号通路有关。  相似文献   

3.
目的:检测子宫内膜癌组织中核转录因子‐κB(NF‐κB)、单核细胞超化蛋白‐1(MCP‐1)的表达并探讨其意义。方法选取该院及江苏省苏北人民医院2003年1月至2013年12月子宫内膜癌标本52例,采用免疫组织化学SP法检测52例子宫内膜癌、16例子宫内膜不典型增生、19例增生期子宫内膜中NF‐κB、MCP‐1蛋白的表达,及子宫内膜癌中两者与临床病理特征的关系和两者间的相关性。结果子宫内膜癌组织中NF‐κB、MCP‐1蛋白的表达明显高于子宫内膜不典型增生、增生期子宫内膜(P<0.05),NF‐κB和MCP‐1的表达与组织学分级、肌层浸润深度有关(P<0.05),与临床分期、淋巴结转移无关(P>0.05),二者之间的表达呈正相关(r=0.895,P<0.05)。结论NF‐κB、MCP‐1蛋白参与子宫内膜癌的发生发展过程。  相似文献   

4.
目的:探讨H2型松弛素(Relaxin‐2)对血管平滑肌细胞(VSMCs)迁移的作用及分子机制。方法采用划痕实验和Transwell实验检测Relaxin‐2对VSMCs的迁移作用;采用蛋白质印迹法检测其对细胞信号蛋白丝氨酸苏氨酸蛋白激酶(Akt)、细胞外信号调节激酶(ERK)、核因子‐κB(NF‐κB) p65的影响。结果 Relaxin‐2可剂量依赖性促进VSMCs的迁移,应用NF‐κB抑制剂BAY 11‐7082可阻断Relaxin‐2诱导的基质金属蛋白酶‐9(MMP‐9)和基质金属蛋白酶‐2(MMP‐2)的表达,磷脂酰肌醇3激酶(PI3K)抑制剂LY294002和ERK抑制剂 U0126预处理可以降低Relaxin‐2引起的NF‐κB p65的激活。结论 Relaxin‐2可能通过活化PI3K/Akt和ERK信号通路激活NF‐κB p65,进而促进MMP‐9和MMP‐2的表达,从而诱导VSMCs迁移效应。  相似文献   

5.
郭彩霞 《重庆医学》2016,(12):1612-1615
目的:探讨阿奇霉素通过TLR‐4/NF‐κB信号通路干预慢性阻塞性肺疾病(COPD)大鼠炎症的机制。方法36只SD大鼠分为健康对照组、模型组、阿奇霉素组。模型组及阿奇霉素组采用烟熏联合气管内滴入脂多糖1个月建立COPD大鼠模型。阿奇霉素组烟熏前30 min给予50 mg/kg阿奇霉素灌胃,健康对照组及模型组给予等量生理盐水。1个月后,处死大鼠,苏木素‐伊红(HE)染色观察肺组织病理形态;ELISA法检测肺组织匀浆中肿瘤坏死因子‐α(TNF‐α)、IL‐1β、IL‐6水平;RT‐PCR检测Toll样受体4(TLR4)及核因子‐κB(NF‐κB)、磷酸化p65(pp65) mRNA表达;Western blot检测 TLR4、pp65、基质金属蛋白酶2(MMP‐2)及MMP‐9表达水平。并对大鼠支气管肺泡灌洗液进行细胞分类和计数。结果与模型组比较,阿奇霉素组能改善肺组织形态,降低中性粒细胞数(P<0.01),减少肺组织匀浆中 TNF‐α、IL‐1β、IL‐6、MMP‐2及MMP‐9的分泌(P<0.01),并抑制TLR4表达及pp65(P<0.01)。结论阿奇霉素能通过TLR‐4/NF‐κB信号通路干预COPD大鼠炎症。  相似文献   

6.
杨庆强  唐春燕 《重庆医学》2015,(16):2174-2176
目的:观察HT‐29细胞在低氧下分泌的基质金属蛋白酶2/9(MMP‐2/9)活性,检测NF‐κB的蛋白表达,初步探讨低氧与肿瘤恶性演进的关系。方法参照体内肿瘤的氧分压,建立低氧模型。将 H T‐29细胞低氧处理不同时段,明胶酶谱分析检测其分泌的MMP‐2/9活性变化;提取细胞核蛋白,Western blot测定胞核内NF‐κB的表达。结果低氧12 h ,HT‐29细胞分泌的MMP‐2/9活性逐渐上调,24 h达顶峰。在低氧的诱导下,HT‐29细胞核内NF‐κB的表达趋势与MMP‐2/9活性变化趋势基本一致。结论低氧能诱导 HT‐29细胞分泌高活性的 MMP‐2/9而促进其向恶性演进,可能与细胞核内 NF‐κB的表达上调有关。  相似文献   

7.
韩知峡  杨婷  张春莲  熊伟  张青碧 《重庆医学》2016,(18):2457-2459
目的:探讨抗氧化剂还原型谷胱甘肽(GSH)对微囊藻毒素‐LR(MC‐LR)染毒小鼠肝脏抗氧化功能的影响。方法选择健康清洁级5周龄昆明种小鼠40只,通过随机抽样的方法分为5组,生理盐水对照组、GSH对照组、MC‐LR染毒组、MC‐LR染毒+ GSH低剂量组(GSH低剂量干预组)、MC‐LR染毒+GSH高剂量组(GSH高剂量干预组),每组8只,雌雄各半,经腹腔注射持续染毒15 d ,检测肝脏组织病理变化情况及肝脏组织 GSH水平、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH‐Px)活力和丙二醛(MDA)水平。结果与生理盐水对照组比较,MC‐LR染毒组肝细胞GSH水平及SOD、GSH‐Px活力明显降低(P<0.05),MDA水平明显增高(P<0.05)。与MC‐LR染毒组比较,GSH低、高剂量干预组GSH水平及SOD、GSH‐Px活力均增高(P<0.05),MDA水平均降低(P<0.05)。结论 GSH干预后可减轻MC‐LR所致小鼠肝脏氧化毒性,对肝脏具有一定的保护作用。  相似文献   

8.
目的:研究坎地沙坦对内毒素(LPS)诱导血管平滑肌细胞(VSMCs)炎症因子释放的影响,探讨 Toll 样受体4(TLR4)介导的信号通路在这一过程中的作用。方法原代培养大鼠 VSMCs ,四甲基偶氮唑蓝(M TT )法测定不同浓度坎地沙坦对 VSMCs 活性的影响。将细胞分为5组:A 组(对照组)、B 组(LPS 干预组)、C 组(LPS +10-7 mol/L 坎地沙坦)、D 组(LPS +10-6 mol/L 坎地沙坦)和 E 组(LPS +10-5 mol/L 坎地沙坦)。实时定量 PCR 和 Western blot 测定各组细胞 TLR4、髓样分化因子88(Myd88) mRNA 和蛋白的表达、NF‐κB(p65)的核转位水平;ELISA 测定各组细胞上清液白细胞介素‐1β(IL‐1β)和肿瘤坏死因子‐α(TNF‐α)分泌水平;DCFH‐DA 氧化法测定细胞内活性氧(iROS)含量。使用 TLR4阻滞剂 TLR4抗体、NADPH 氧化酶阻滞剂二联苯基碘(DPI)、NF‐κB 阻滞剂 PDTC 或坎地沙坦与阻滞剂联用预处理细胞,ELISA 法测定 IL‐1β和 TNF‐α分泌水平。结果坎地沙坦在10-8~10-3 mol/L 浓度范围内对 VSMCs 活性没有显著影响。同对照组相比,坎地沙坦可以有效抑制 LPS 诱导VSMCs IL‐1β和 TNF‐α的释放,减少 TLR4、Myd88 mRNA 和蛋白的表达以及 iROS 的生成,抑制 NF‐κB(p65)的核转位,并具有剂量依赖性。 TLR4抗体、DPI 、PDTC 均能有效地抑制 LPS 诱导的炎症因子释放,坎地沙坦与阻滞剂联用显示出更强的抗炎作用。结论坎地沙坦能够减少 LPS 诱导的 VSMCs 炎症因子 IL‐1β和 TNF‐α的分泌,这一作用可能是通过抑制 TLR4/Myd88‐iROS‐NF‐κB 信号通路而实现的。  相似文献   

9.
熊果酸对喉癌 Hep-2细胞侵袭的影响及机制研究   总被引:1,自引:0,他引:1  
张军辉  严家芹  赵玉林 《重庆医学》2015,(33):4621-4623
目的:探讨熊果酸对人喉癌 Hep‐2细胞侵袭能力的影响及机制。方法不同浓度熊果酸处理人喉癌 Hep‐2细胞不同时间后,采用 M TT 法检测细胞的增殖活性,Boyden chamber 检测细胞的侵袭能力,Western blot 检测周期相关基因 NF‐κB蛋白表达的变化。明胶酶谱检测细胞培养上清液基质金属蛋白酶(MM P)‐9和 MMP‐2活性的变化。结果熊果酸对人喉癌Hep‐2细胞的生长具有明显的增殖抑制作用,其作用表现为剂量依赖性和时间依赖性(P<0.01)。 Boyden chamber 结果显示以熊果酸处理 Hep‐2细胞后,侵袭能力呈浓度依赖性下降(P <0.01)。 Western blot 结果显示熊果酸对人喉癌 Hep‐2细胞 NF‐κB蛋白表达呈浓度依赖性下调(P<0.01)。明胶酶谱结果显示熊果酸对人喉癌 Hep‐2细胞 MM P‐9和 MMP‐2活性呈浓度依赖性下调(P<0.01)。结论熊果酸通过降低 MMP‐9和 MMP‐2活性及 NF‐κB 蛋白表达来抑制人喉癌 Hep‐2细胞的增殖和侵袭。  相似文献   

10.
郭迪  李宏云  杨华 《重庆医学》2016,(10):1297-1301
目的:研究微小RNA‐152(miRNA‐152)在非小细胞肺癌(NSCLC)顺铂(DDP)耐药过程中的作用机制。方法实时荧光定量逆转录PCR(qRT‐PCR)检测NSCLC细胞株A549及其DDP耐药株A549/DDP细胞内的miRNA‐152水平。通过转染miRNA‐52模拟物(miRNA‐152 mimic)以提高A549/DDP细胞内的microRNA‐152水平。MTT试验、倒置相差显微镜技仪和流式细胞术观察上调miRNA‐152对细胞增殖及凋亡的影响,同时采用qRT‐PCR和Western blot技术观察细胞内Bcl‐2及核转录因子‐κB(NF‐κB)水平变化。结果 A549/DDP细胞中存在miRNA‐152的低表达,Bcl‐2及 NF‐κB的高表达。上调miRNA‐152后,DDP造成的A549/DDP细胞增殖抑制率和凋亡率显著高于未上调miRNA‐152的细胞,差异有统计学意义(P<0.05)。此外, miRNA‐152 mimic转染可显著降低A549/DDP细胞中的Bcl‐2及 NF‐κB表达。结论低miRNA‐152表达可能引起 NSCLC对DDP的耐药,miRNA‐152可能通过调节Bcl‐2及NF‐κB的水平介导NSCLC细胞对顺铂的敏感性。  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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