首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 62 毫秒
1.
??OBJECTIVE To prepare Gd-DOTA-E-2 targeted contrast agent and evaluate its relaxation properties, cytotoxicity and targeting. METHODS E-2 was synthesized by F-moc solid phase method, covalently bonded with chelating agent DOTA, meanwhile ultilizing chelating ligand Gd3+ to prepare MRI contrast agent Gd-DOTA-E-2. The structure was characterized by ESI-MS and NMR, and the properties were evaluated by relaxation properties, MTT and mouse MRI contrast assay. RESULTS ESI-MS and NMR RESULTS showed that Gd-DOTA-E-2 was synthesized successfully, and its relaxation efficiency(k=9.551 mmol-1??L??s-1) is 1.84 times more efficient than a commercially available contrast agent of Gd-DOTA; MTT RESULTS showed that the toxicity of Gd-DOTA-E-2 cell is lower than that of Gd-DOTA; the experimental RESULTS in MRI angiography showed that Gd-DOTA-E-2 is possessing of targeting and can image clearly. CONCLUSION Gd-DOTA-E-2 is a kind of MRI contrast agent with good stability, low cytotoxicity and targeted properties in vivo,which is valuable in research and application.  相似文献   

2.
??OBJECTIVE To prepare nano-micelles with amphiphilic self-assembly poly (ethylene glycol)-co-poly (propylene sulfide) (PEG-PPS) copolymer as carrier to study the release characteristics of tilianin and investigate its activity to against H9c2 cell apoptosis in vitro. METHODS An amphiphilic diblock PEG-PPS polymer was used as a carrier material to prepare the tilianin-containing nano-micelles by solvent evaporation. The morphology, particle size and distribution, drug loading and encapsulation rate and in vitro drug release behavior were characterized, H9c2 rat myocardial cell injury model was established by hypoxia/reoxygenation process. Using propranolol (Pro) as a positive control, the morphology of injured cardiomyocytes was observed by microscope. Cell proliferation and cell apoptosis was detected to evaluate the protective effect of blank micelles, tilianin and tilianin loaded nano-micelles on H9c2 cells induced by hypoxia/reoxygenation. RESULTS Tilianin-loaded nano-micelles was spherical with uniform particle size distribution. The drug loading was 3.82%. The average particle diameter of tilianin-loaded nano-micelles was 137 nm, polydispersity coefficient was 0.162 and the encapsulation efficiency was 91.45%. In vitro drug release studies showed that there was no drug-induced burst release of tilianin-containing nano-micelles and sustained release characteristics, and the presence of hydrogen peroxide significantly promoted the release of tilianin from the nano-micelles. In vitro cytotoxicity experiments showed that when the concentration of tilianin 5 ??g??mL-1, the cell viability of tilianin-loaded nano-micelles was significantly higher than the corresponding concentration of tilianin and PEG-PPS polymer nano-micelles. In vitro anti-apoptotic activity experiments show that tilianin-loaded nano-micelles on H9c2 cell apoptosis induced by hypoxia-reoxygenation have a significant inhibitory effect and was provided inhibition of apoptosis with propranolol. CONCLUSION Tilianin-loaded nano-micelles have uniform particle size and distribution, sustained release and oxidation characteristics, has a significant protective and apoptosis-inhibiting effect on H9c2 cell injury induced by hypoxia-reoxygenation, which can be used as a promising drug delivery system for the treatment of myocardial ischemia-reperfusion injury.  相似文献   

3.
??OBJECTIVE To investigate the nephroprotective effect of danzhi jiangtang capsule(DJC) on diabetic rats induced by streptozotocin(STZ) and elucidate its mechanism. METHODS Model of diabetic rats were established by combination of high-fat diet-fed and low-dose STZ injection in SD rats. The successful models were chosen and randomly divided into model group, low-dose and high-dose of DJC(600, 2 000 mg??kg-1, ig)groups, each consisting of 8 rats. Control and model groups were administered equal volume of distilled water. After 8 weeks of treatment, the rats were killed and serum was separated to detect blood lipid, renal function and oxidative stress. The kidneys were weighed, and the renal indexes were calculated. Renal tissue specimens were fixed for HE and PAS staining; the expressions of JAK2, STAT3, p-JAK2, p-STAT3 in the kidneys were observed by Western blot; the renal inflammatory factors TNF-??, IL-6 and MCP-1 were detected by ELISA. RESULTS Fasting blood glucose (FBG), blood lipid, renal index, oxidative stress of model group were significantly increased, renal function was reduced, and the morphology of renal tissue changed significantly. The renal inflammatory cytokine TNF-??, IL-6 and MCP-1 and the expressions of p-JAK2, p-STAT3 increased significantly in diabetes mellitus rats. After 8 weeks of treatment, blood lipid and oxidative stress in DJC groups were decreased, but there was no obvious difference in FBG between DJC groups and model group, the renal function and the pathological changes of renal tissue were improved obviously. The expressions of inflammatory cytokine(TNF-??, IL-6 and MCP-1), p-JAK2 and p-STAT3 in renal cortex were significantly down-regulated. CONCLUSION The nephroprotective effect of DJC is based on its antioxidant effect and anti-inflammatory effect via suppression of JAK2/STAT3 signal transduction.  相似文献   

4.
??OBJECTIVE To evaluate the efficacy of glucagon-like peptide-1 receptor agonists (GLP-1RA) on nonalcoholic fatty liver disease (NAFLD) in patients with type 2 diabetes mellitus (T2DM). METHODS The randomized controlled trials (RCTs) of GLP-1 RA, placebo, and anti-diabetes drugs in the treatment of NAFLD in patients with T2DM were collected from PubMed, Embase, CNKI, Wangfang database, VIP, and CBM. The trials were evaluated for the quality and selected, and the RESULTS of the studies were reviewed and analyzed using RevMan 5.2 software. RESULTS Four RCTs were included, involving 154 patients. The Meta-analysis showed that compared with the control group, GLP-1RA could significantly improve the ALT [MD:-8.36,95%CI(-13.41-3.31), P=0.001], HbA1c [MD:-0.43%,95%CI(-0.73-0.31), P=0.005], FBG [MD:-0.71%, 95%CI(-1.39-0.03),P=0.04],BMI [MD:-1.38%, 95%CI(-2.18-0.58), P=0.000 8], TG [MD:-0.49%, 95%CI(-0.82-0.16), P=0.004]. CONCLUSION GLP-1 RA can obviously improve the metabolic index of patients with NAFLD and T2DM. Given the quality and quantity of the literature, large RCTs are still needed in the future.  相似文献   

5.
??OBJECTIVE To advocate Patient Assistant Program Projects (PAP Projects) decision-making, this study assesses the long-term cost-effectiveness of 1-year adjuvant trastuzumab therapy for women with human epidermal growth factor receptor 2 (HER2) positive early breast cancer. METHODS A Markov model tracked yearly patients?? transitions between five health states. The cycle length was 1 year and the sum was 45. From the perspective of the China health insurance system, the direct medical cost was estimated based on a survey of clinical expert panels. A discounting rate of 3% was used to discount direct medical cost and health outcomes. Utility and transition probabilities were retrieved from the HERA trial and literature. To estimate the direct medical cost, a survey of clinical expert panels was conducted. The cost of trastuzumab and HER2 test based on Roche. The key factor of the model was realized by one-way sensitivity analysis. The result of a probability sensitivity analysis conducted by Monte Carlo simulation was expressed as an incremental cost-effectiveness scatter plot. RESULTS Without PAP Projects in Guangzhou, the adjuvant trastuzumab treatment prolonged 1.79 QALYs when the cost increased ??53 301 and the Incremental cost-effectiveness ratio (CER) was ??29 731/ QALY, which is cost-effective based on Guangzhou's per capita GDP in 2015. With PAP Projects, the adjuvant trastuzumab treatment was totally cost-effectiveness. The sensitivity analysis demonstrated that the model was moderate. CONCLUSION One year adjuvant trastuzumab treatment is a cost-effective therapy for patients with HER-2 positive breast cancer. With PAP Projects in Guangzhou, the adjuvant trastuzumab treatment is projected to be associated with improved QALYs and reduces direct medical costs, compared with the standard chemotherapy, represents a dominant treatment option among patients with HER2-Positive Early Breast Cancer. PAP Projects in Guangzhou should be persisted and spread in China.  相似文献   

6.
目的探讨transgelin 2在人乳腺癌紫杉醇耐药细胞(MCF-7/PTX)紫杉醇耐药和侵袭转移中的作用。方法在倒置显微镜下观察细胞的形态;采用MTT法测定细胞活性;运用Western blot和Real-time PCR检测细胞中transgelin 2,E-cadherin,Ncadherin,Vimentin的蛋白和mRNA表达;通过细胞划痕和Transwell侵袭实验分别测定细胞的迁移和侵袭能力;运用小干扰RNA技术降低MCF-7/PTX细胞中transgelin 2的表达。结果 MCF-7/PTX细胞发生EMT过程,并具有较强的耐药和侵袭迁移能力;干扰transgelin 2后,增强MCF-7/PTX细胞对紫杉醇的敏感性,抑制它们的侵袭和迁移能力。结论高表达transgelin 2不仅能够诱导MCF-7/PTX对紫杉醇的耐药,还能促进侵袭转移的发生,提示transgelin 2可望成为乳腺癌新的肿瘤标志物及治疗靶点。  相似文献   

7.
目的:评价四神丸灌肠给药治疗实验性结肠炎疗效的同时,探讨其对结肠炎结肠黏膜Fas/FasL,Bax/Bcl-2 mRNA的调控作用.方法:三硝基苯磺酸(trinitrobenzene sulfonic acid,TNBS)/乙醇法复制实验性结肠炎,实验动物随机分成正常组、模型组、四神丸高、中、低剂量组(10,5,2.5 g· kg-1)及柳氮磺吡啶(salicylazosulfapyridine,SASP,30 mg·kg-1)组,灌肠给药10d后,通过体重、结肠湿重、结肠质量指数、病理损伤评分及形态学分析评价其疗效,同时分别采用流式细胞术和RT-PCT技术检测大鼠结肠组织Fas/FasL水平和Bax/Bcl-2 mRNA表达.结果:与模型组比较,四神丸中剂量组可明显降低结肠湿重及结肠指数(P<0.05),且3个剂量组均可明显降低病理损伤评分(P<0.05),同时典型治疗组病理切片分析可见上皮修复,黏膜下纤维结缔组织增生,溃疡浅而小,少量淋巴滤泡增生和炎细胞浸润,而且3个剂量组均可显著降低Fas在结肠黏膜表达(P<0.05),升高Bcl-2/Bax(P <0.05).结论:四神丸灌肠给药有效治疗溃疡性结肠炎的作用机制之一可能是通过调控结肠组织Fas/FasL,Bax/Bcl-2 mRNA表达,延缓结肠上皮细胞凋亡或促进炎细胞凋亡实现的.  相似文献   

8.
华蟾素对晶状体上皮细胞增殖及bcl-2 mRNA、bax mRNA表达影响   总被引:1,自引:0,他引:1  
目的 探讨华蟾素对兔晶状体上皮细胞(lens epithelial cells, LECs)增殖及凋亡抑制基因bcl-2 mRNA、凋亡促进基因bax mRNA表达的影响。  相似文献   

9.
目的:探讨姜黄素防治高脂血症致肾脏损害的作用机理。方法:喂食高脂饲料造成大鼠高脂血症致肾脏损害模型,姜黄素(高、中、低剂量)同时干预给药12周,实验结束后,分别检测大鼠肾皮质TGF-β1 mRNA和MMP-2mRNA的表达。结果:姜黄素高、中剂量组肾皮质TGF-β1 mRNA表达较模型对照组显著减少,且姜黄素高荆量组显著少于低剂量组(P〈0.01);姜黄素高剂量组肾皮质MMP-2mRNA表达较模型对照组明显增多,且明显多于低剂量组(P〈0.01)。结论:姜黄素能减少肾皮质TGF-β1 mRNA表达,提高肾皮质MMP-2mRNA表达,呈量效依赖关系,从而有效地防治高脂血症致肾脏损害。  相似文献   

10.
??OBJECTIVE To systematically review the efficacy and safety of dipeptidyl peptidase-4(DPP-4) inhibitors versus glucagon like peptide-1(GLP-1) receptor agonists for type 2 diabetes mellitus(T2DM). METHODS Databases including EMbase,PubMed, The Cochrane Library, Clinical Trial, CBM,CNKI and WanFang Data, were searched electronically for randomized controlled trials (RCTs) of DPP-4 inhibitors versus GLP-1 receptor agonists for T2DM up to December 2015. Two reviewers independently screened literatures according to the inclusion and exclusion criteria, extracted data, and assessed the methodological quality of the included studies. Then Meta-analysis was performed using RevMan 5.3 soft ware. RESULTS A total of 13 RCTs were included. The RESULTS of Meta-analysis showed that compared with DPP-4 inhibitors, GLP-1 receptor agonists were more effective in reducing the levels of fasting plasma glucose [MD=0.93, 95%CI(0.48,1.38), P??0.000 1] and glycated hemoglobin [MD=0.53,95%CI(0.34,0.73), P??0.000 01] and BMI [MD=1.53,95%CI(0.83,2.22),P??0.001]. However, DPP-4 inhibitors were more effective than GLP-1 receptor agonists in the reducing the 2-hour postprandial blood glucose level. And GLP-1 receptor agonists were more prone to cause gastrointestinal adverse reactions than DPP-4 inhibitors [RR=0.44,95% CI (0.33, 0.59), P<0.000 1]. CONCLUSION GLP-1 receptor agonists are superior to DPP-4 inhibitors in controlling the fasting plasma glucose and glycated hemoglobin levels and reducing the body weight of T2DM patients, while DPP-4 inhibitors have better efficacy in reducing 2-hour postprandial blood glucose level, with better tolerability.  相似文献   

11.
目的:观察地骨皮提取液对,T2DM大鼠肾组织NF-kB活性,肾脏病理,血清炎症因子IL-6、TNF-a水平的影响.探讨其对T2DM肾脏病变的防治作用及相关机制.方法:应用小剂量STZ加高脂饮食制备T2DM大鼠模型.分为正常对照组(A)、DM无干预组即模型组(B)、罗格列酮干预组(C)、地骨皮醇提高剂量干预组(D)、地骨皮醇提低剂量干预组(E).用EMSA(电泳迁移率变动分析)方法检测NF-kB活性.结果:药物干预均可不同程度改善肾脏病理,E组大鼠的病理改善略弱于C组,D组肾脏病理改善较显著.与A组相比,B组肾组织NF-kB活性、血清IL-6、TNF-a水平均有显著升高,C、D、E均有升高但明显低于B组,模型组IL-6、TNF-a、尿白蛋白排泄率与NF-kB活性呈正相关(P<0.05).结论:①通过小剂量STZ加高脂饮食的方法可成功复制T2DM大鼠模型.该模型在第6周已出现糖尿病早期肾脏病变.②T2DM大鼠肾组织中NF-kB活性显著增强.地骨皮干预可减少NF-kB表达,降低血清炎症因子,从而改善肾脏病理、肾功能.  相似文献   

12.
目的:探讨姜黄素防治高脂血症致肾脏损害的作用机理。方法:喂食高脂饲料造成大鼠高脂血症致肾脏损害模型,姜黄素(高、中、低剂量)同时干预给药12周,实验结束后,分别检测大鼠肾皮质TGF-β1mRNA和MMP-2mRNA的表达。结果:姜黄素高、中剂量组肾皮质TGF-β1mRNA表达较模型对照组显著减少,且姜黄素高剂量组显著少于低剂量组(P<0.01);姜黄素高剂量组肾皮质MMP-2mRNA表达较模型对照组明显增多,且明显多于低剂量组(P<0.01)。结论:姜黄素能减少肾皮质TGF-β1mRNA表达,提高肾皮质MMP-2mRNA表达,呈量效依赖关系,从而有效地防治高脂血症致肾脏损害。  相似文献   

13.
目的观察健肾颗粒剂对DN大鼠肾功能及肾脏组织中TGF-β1mRNA影响.方法采用5/6肾切除加尾静脉注射STZ的方法复制大鼠DN动物模型,并随机分成健肾颗粒剂、洛汀新、保肾康、病理对照及正常对照组,采用生化法检测肾功能,PCR方法检测肾脏组织中TGF-β1mRA,组织病理学方法观察肾脏组织结构.结果健肾颗粒剂组大鼠血中Cr、BUN水平低于洛汀新、保肾康及病理对照组(P<0.05或P<0.01);健肾颗粒剂组肾脏组织中TGF-β1mRNA表达明显低于其他3组(P<0.05或P<0.01),肾脏组织病理结构也较其他3组有明显改善;健肾颗粒剂降低DN大鼠血糖、尿蛋白及血脂的作用明显优于洛汀新、保肾康及病理对照组(P<0.05或P<0.01).结论健肾颗粒剂可明显改善DN大鼠肾功能,并有降血糖、调整血脂、下调DN大鼠肾脏TGF-β1mRNA的作用.  相似文献   

14.
目的:探讨2型糖尿病(T2DM)合并肾脏损害的临床特点,总结亟待改进和注意的环节,为临床诊疗提供借鉴.方法:分析T2DM合并肾脏损害的分类,讨论如何鉴别2型糖尿病肾脏疾病(DKD)与T2DM合并非糖尿病性肾脏疾病(NDRD),以及分析各自的治疗原则.结果:病理改变是鉴别2型DKD与T2DM合并NDRD的可靠指标.结论:...  相似文献   

15.
目的观察中药复方肾消康对糖尿病肾病大鼠的防治作用及对肾脏基因表达的影响,探讨糖尿病肾病(DN)的发病机制,揭示中药复方肾消康防治DN的作用机理,筛选药效作用靶点,为临床推广应用提供科学依据。方法采用链脲佐菌素(STZ)加高热量饮食建立糖尿病大鼠肾脏损伤模型。运用放免、生化、光镜、电镜及美国Affymetrix公司的基因表达谱芯片、RT-PCR等先进检测手段和方法,观察了多项指标,尤其是通过聚类分析寻找和DN有重要相关性的基因,并进一步采用实时荧光定量RT-PCR法做验证实验研究。结果真核生物翻译起始因子3,8亚基(eIF3s8),在糖尿病大鼠肾脏表达下调,肾消康治疗组表达上调。结论应用Affymetrix Rat2302.0基因表达谱芯片检测糖尿病大鼠肾脏基因的表达,eIF3s8是筛选出的肾脏差异表达基因和药效靶点之一,并对该基因做荧光定量RT-PCR测序分析。这在国内外尚属首次。基因功能分析表明,在糖尿病状态下,eIF3s8表达下调,与糖尿病肾脏损伤有重要相关性,而经肾消康治疗后大鼠肾脏组织中eIF3s8表达上调,可见肾消康对eIF3s8基因表达具有良性调节作用,其作用机制还有待于进一步研究。  相似文献   

16.
目的 研究心肝宝胶囊对阿霉素肾病大鼠的肾脏保护作用。  相似文献   

17.
目的:观察加味升降散对膜性肾病(MN)大鼠模型血液生化指标及对肾线粒体活性氧(ROS)表达的影响。方法:将60只SD雄性大鼠,适应性喂养7 d后随机分为4组,造模成功后西药组给予盐酸贝那普利(10 mg·kg~(-1)·d~(-1))灌胃,中药治疗组给予加味升降散(13.22 g·kg~(-1)·d~(-1))灌胃,模型组和正常组给予同等剂量的生理盐水灌胃。4周后,生化试剂盒测定各组大鼠24 h尿蛋白定量(UTP),血清总胆固醇(TC),甘油三酯(TG),总蛋白(TP),白蛋白(ALB),尿素氮(BUN),肌酐(SCr),实时荧光定量聚合酶链式反应(Real-time PCR)测定大鼠肾组织线粒体ROS mRNA的表达。结果:与正常组比较,其余各组造模后UTP,TC,TG均升高(P0.01),TP,ALB显著下降(P0.05);治疗后,加味升降散组、盐酸贝那普利组与正常组比较,血液生化指标及对肾线粒体ROS均改善,但未恢复正常水平。治疗结束后,与模型组比较,加味升降散组、盐酸贝那普利组UTP,TC,TG均有所降低(P0.05),加味升降散组、盐酸贝那普利组TP,ALB均有所升高(P0.05)。加味升降散组与盐酸贝那普利组UTP,TC,TG,TP,ALB比较无统计学意义。治疗结束后,与模型组比较,加味升降散组、盐酸贝那普利组大鼠肾组织中足细胞线粒体ROS mRNA的表达较模型组明显下调(P0.05);加味升降散组与盐酸贝那普利组线粒体ROS mRNA比较差异无统计学意义。结论:加味升降散对膜性肾病大鼠的肾保护作用可能与其能够下调肾组织线粒体ROS mRNA表达,抑制足细胞凋亡、修复受损足细胞有关。  相似文献   

18.
目的 探讨参芪地黄汤治疗IgA肾病的可能作用机制. 方法 将60只SD大鼠随机分为正常组、模型组、雷公藤组、中药低剂量组、中药高剂量组,每组12只,采用“白蛋白十脂多糖十四氯化碳”联合法建立IgA肾病大鼠模型.中药低、高剂量组分别给予参芪地黄汤1.4、2.8g/100g灌胃,雷公藤组给予雷公藤多甙片0.625mg/100g灌胃,模型组、正常组给予等量生理盐水灌胃,每日1次.12周末处死大鼠,检测各组血肌酐、尿蛋白定量、血清白蛋白水平;免疫组化和Western-blot法检测肾组织nephrin、podocin蛋白表达;RT-PCR法检测肾组织nephrin mRNA、podocin mRNA表达. 结果 与正常组比较,其余各组尿蛋白定量均明显升高(P<0.05);与模型组比较,各给药组尿蛋白定量均明显下降(P<0.05).与正常组比较,其余各组大鼠肾组织nephrin、podocin蛋白及mRNA表达均明显下降(P<0.05);与模型组比较,各给药组大鼠肾组织nephrin、podocin蛋白及mRNA表达均明显升高(P<0.05).结论 参芪地黄汤能有效降低IgA肾病大鼠尿蛋白定量,其机制可能是通过上调肾组织nephrin和podocin表达.  相似文献   

19.
目的:观察糖尿病肾病大鼠血糖、血脂、血清尿素氮、肌酐和糖化血红蛋白的变化以及消渴康的治疗作用。方法:采用腹腔一次性注射链尿佐菌素(STZ)、同时饲喂高脂饲料复制大鼠糖尿病肾病模型。将动物分为模型组、消渴康组和正常对照组,注射STZ4周后治疗组给予消渴康治疗。于注射STZ后8、12、16周取血测定空腹血糖、血脂、血清尿素氮和肌酐,第16周测定糖化血红蛋白。结果:注射STZ后8、12、16周模型组空腹血糖、血脂和尿素氮明显升高,12、16周血清肌酐和16周血液糖化血红蛋白明显高于正常组。消渴康治疗组与模型组同期比较以上指标有不同程度的减轻。结论:消渴康有良好的改善糖尿病高血糖、高血脂和肾功能损害的作用。  相似文献   

20.
目的:研究雷公藤多苷对实验性糖尿病大鼠结缔组织生长因子(CTGF)异常表达及肾功能指标的影响,探讨其保护肾功能的机制。方法:雄性SD大鼠随机分为正常对照组、模型组和雷公藤多苷治疗组(1.8 g.kg-1.d-1灌胃,1次/d,连续8周),链脲佐菌素(STZ)腹腔注射建立糖尿病大鼠模型,给药第4,8周末分别测定大鼠体重、血糖、血尿素氮(BUN)、血肌酐(Cr)及24 h尿蛋白定量;HE染色法观察大鼠肾脏病理学变化;免疫组化染色测定肾组织中CTGF蛋白表达。结果:与正常对照组比较,模型组血糖、BUN,Cr,24 h尿蛋白定量在第4,8周末显著增加(P<0.01),肾脏CTGF蛋白表达增加(P<0.01),雷公藤多苷干预后可显著抑制模型组的病理改变(P<0.05或P<0.01)。结论:CTGF表达与糖尿病肾病的进展有关,雷公藤多苷可能通过下调CTGF的表达,减少糖尿病大鼠尿蛋白排泄量,改善肾脏功能,延缓糖尿病肾病肾脏的损害。  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号