AIM: To evaluate the effect of amniotic membrane loaded with 5-fluorouracil poly(lactic-co-glycolic acid)(PLGA) nanoparticles(5-FU-NPs) in the surgical outcomes of experimental trabeculectomy in rabbits.METHODS: Thirt...AIM: To evaluate the effect of amniotic membrane loaded with 5-fluorouracil poly(lactic-co-glycolic acid)(PLGA) nanoparticles(5-FU-NPs) in the surgical outcomes of experimental trabeculectomy in rabbits.METHODS: Thirty-two New Zealand white rabbits were randomly categorized into four groups with 8 rabbits in each group. Group 1, the control group, performed traditional trabeculectomy without adjuvant treatment.While the experimental groups performed compound trabeculectomy with different implantations including amniotic membrane(group 2), 5-FU-NPs(group 3) and amniotic membrane loaded with 5-FU-NPs(group 4).Clinical evaluations including IOP measurement and filtration bleb analysis were performed in all groups postoperatively.RESULTS: There is no significant difference of mean IOP in all groups at first 7d after surgery. While at P14,mean IOPs of experimental group 2(9.8 ±2.1 mm Hg),groups 3(8.9 ±2.8 mm Hg) and group 4(7.6 ±2.3 mm Hg)were significantly reduced compared to control group(12.4 ±2.6 mm Hg; n =8, P 【0.05). At P21, mean IOPs of groups 3(11.7±3.2 mm Hg) and group 4(9.9±1.6 mm Hg)were significantly decreased compare to control group(17.9±1.6 mm Hg) and group 2(16.6 ±2.8 mm Hg; n =8,P 【0.05). At P28, mean IOPs of groups 3(13.8±3.3 mm Hg)and group 4(10.6 ±2.0 mm Hg) were also significantly reduced compare to control group(19.4±2.3 mm Hg) and group 2(18.5 ±2.4 mm Hg; n =8, P 【0.05). Meanwhile mean IOP of group 4 is significantly decreased compared to group 3 at P28(n =8, P 【0.05). Survival analysis of functional filtration blub in all groups revealed the longest survival time in group 4(24.9±5.1d) compared to that in group 3(20.6 ±4.3d), group 2(15.0 ±5.2d) and control group(10.1±5.7d).CONCLUSION: Amniotic membrane loaded with 5-FuNPs may function as an effective anti-scarring implant and provides improved long-term surgical outcomes for experimental trabeculectomy in rabbits.展开更多
Template-free nanosized ZSM-5 seeds with an average size of 15 nm were prepared from a synthesis solution with the composition 12Na2O∶100SiO2∶2Al2O3∶2500H2O. By the use of these seeds, thin ZSM-5 zeolite membranes ...Template-free nanosized ZSM-5 seeds with an average size of 15 nm were prepared from a synthesis solution with the composition 12Na2O∶100SiO2∶2Al2O3∶2500H2O. By the use of these seeds, thin ZSM-5 zeolite membranes were prepared on the outer surface of a porous α-alumina tube with a pore size of 2 μm in a gel system by varying-concentration synthesis with organic-free template. The first composition synthesis sol-gel was the same as seeds of molar composition and the second one was 12Na2O∶100SiO2∶2Al2O3∶5000H2O at 180 ℃ for 10 h, respectively. XRD shows that the film consists of well-crystallized ZSM-5 zeolite. SEM investigation indicats that the zeolite films on the supports are defect free and the film thickness is approximately 8 μm. The permeances for H2, N2, CH4 and CO2 are 8.94×10-7, 3.27×10-7, 3.9×10-7, 3.14×10-7 and 0.874×10-7 mol·m2·s-1·Pa-1, respectively. The ideal selectivity of membrane at room temperature for H2/CO2, H2/N2, H2/CH4 are 2.84, 2.73 and 2.29, respectively.展开更多
AIM: To study complement activation in 46 patients with alcoholic cirrhosis and ascites but no spontaneous bacterial peritonitis (SBP) and 10 healthy controls. METHODS: Complement activation was determined by the meas...AIM: To study complement activation in 46 patients with alcoholic cirrhosis and ascites but no spontaneous bacterial peritonitis (SBP) and 10 healthy controls. METHODS: Complement activation was determined by the measurement of soluble membrane attack complex (sMAC) concentrations in ascites and plasma. In patients, metabolic liver function was determined by the galactose elimination capacity and the clinical status assessed by the Model of End-Stage Liver Disease and Child-Pugh scores. RESULTS: Ascites sMAC levels were markedly higherthan in the corresponding plasma sample (median (range): 596 (170 - 1519) vs 160 (77 - 848) μg/L; P < 0.01). Ascites sMAC levels correlated positively with liver status. There was no relationship between ascites sMAC and leukocyte count. No relationship between ascites sMAC and blood C-reactive protein, albumin or neutrophile count was found. Plasma sMAC concentrations were slightly higher in patients than in controls [130 μg/L (70 - 204); P = 0.04]. Neither sMAC in ascites nor plasma was related to mortality. CONCLUSION: The increased sMAC concentration in ascites and plasma indicate an activation of the complement system in cirrhosis even in the absence of SBP. This was particularly evident in the peritoneal fluid and most marked in patients with preserved liver status. The high ascites sMAC levels may reflect transudation of membrane attack complexes from the liver. Whether this complement activation has any clinical implications remains to be clarified.展开更多
Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties...Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties of the prepared MEAs were evaluated and analyzed by polarization curve, electrochemistry impedance spectroscopy (EIS), cyclic voltammetry (CV) and durability test. The results showed that MEA with modified ABPBI membrane (AM) has satisfactory performance and durability for fuel cell application. Compare to conventional PBI or Nafion binders, polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as binders in the catalyst layer (CL) of gas diffusion electrode (GDE) for HT-PEMFC.展开更多
目的:探究溶酶体相关膜蛋白5(LAMP5)在胃癌中的表达及预后意义。方法:选择胃癌组织130例及其邻近正常胃组织标本40例,采用组织芯片免疫组化检测LAMP5蛋白表达,分析LAMP5表达与患者临床病理特征及预后的关系。通过TCGA数据库验证胃癌与...目的:探究溶酶体相关膜蛋白5(LAMP5)在胃癌中的表达及预后意义。方法:选择胃癌组织130例及其邻近正常胃组织标本40例,采用组织芯片免疫组化检测LAMP5蛋白表达,分析LAMP5表达与患者临床病理特征及预后的关系。通过TCGA数据库验证胃癌与正常胃组织中LAMP5表达差异,LAMP5表达与患者临床病理特征及总体生存期(overall survival,OS)的关系。采用基因富集分析(gene set enrichment analysis,GSEA)研究LAMP5可能的作用机制。结果:组织芯片免疫组化表明,与正常胃组织相比,胃癌组织LAMP5表达增高,LAMP5表达与胃癌分期(P=0.045)、肿瘤大小(P=0.006)相关。Kaplan-Meier生存曲线分析表明,LAMP5表达与胃癌患者OS呈负相关(P=0.035)。TCGA数据分析显示,与正常胃组织相比,胃癌组织中LAMP5表达增高(P=0.016);Kruskal检验表明LAMP5表达与肿瘤分级G3/G1(P=0.024)及G3/G2(P<0.001),分期SⅡ/Ⅰ(P<0.001)、SⅢ/Ⅰ(P<0.001)及SⅣ/Ⅰ(P<0.001),肿瘤大小T2/T1(P=0.002)、T3/T1(P<0.001)、T4/T1(P<0.001)、T3/T2(P=0.026)及T4/T2(P=0.005)相关。Kaplan-Meier生存曲线分析显示LAMP5表达越高,胃癌患者OS越短(P=0.007)。单因素COX回归分析表明,年龄(P=0.006)、分期(P<0.001)、肿瘤大小(P=0.032)、淋巴结转移(P=0.006)、远处转移(P=0.024)和LAMP5表达(P=0.004)可作为胃癌患者的预后指标;多因素COX回归分析表明,年龄(P<0.001)、性别(P=0.047)和LAMP5表达(P<0.001)可作为胃癌患者预后的独立指标。Gene Ontology(GO)富集分析显示,LAMP5可能参与促进胶原结合、细胞外基质结构成分、糖胺聚糖结合、生长因子结合、整合素结合等通路,抑制呼吸作用、线粒体呼吸链复合物组件、呼吸电子传输链、NADH脱氢酶复合物组件、核糖体结构成分等通路。Kyoto Encyclopedia of Genes and Genomes(KEGG)富集分析表明,LAMP5可能促进ECM受体相互作用、焦点粘附、TGF-β信号通路、Hedgehog信号通路、癌症途径等通路,抑制阿尔茨海默病、氧化磷酸化、亨廷顿病、帕金森病、核糖体等通路。结论:LAMP5在胃癌组织中高表达,LAMP5表达越高,患者总体生存期越差,LAMP5可作为胃癌患者预后的独立影响因素。展开更多
ZSM-5 zeolite membrane reactor was used in ethylbenzene dehydrogenation to styrene under the circumstances of commercial production.The experimental results indicated that the conversion of ethylbenzene in the membran...ZSM-5 zeolite membrane reactor was used in ethylbenzene dehydrogenation to styrene under the circumstances of commercial production.The experimental results indicated that the conversion of ethylbenzene in the membrane reactor increased with increasing pressure of the membrane tube.Using the inert sweep gas instead of vacuumizing, the result of long term steady operation under the same condition showed that the selectivity of styrene increased and the conversion of ethylbenzene in the membrane reactor increased by 7.52% in comparison with the fixed-bed reactor.展开更多
基金Supported by National Natural Science Foundation of China(No.81060081,81241124 and 81360155)Jiangxi Provincial Natural Science Foundation(No.2008GZY00123,2010GZY0089,20114BAB205068 and 20114BAB215006)
文摘AIM: To evaluate the effect of amniotic membrane loaded with 5-fluorouracil poly(lactic-co-glycolic acid)(PLGA) nanoparticles(5-FU-NPs) in the surgical outcomes of experimental trabeculectomy in rabbits.METHODS: Thirty-two New Zealand white rabbits were randomly categorized into four groups with 8 rabbits in each group. Group 1, the control group, performed traditional trabeculectomy without adjuvant treatment.While the experimental groups performed compound trabeculectomy with different implantations including amniotic membrane(group 2), 5-FU-NPs(group 3) and amniotic membrane loaded with 5-FU-NPs(group 4).Clinical evaluations including IOP measurement and filtration bleb analysis were performed in all groups postoperatively.RESULTS: There is no significant difference of mean IOP in all groups at first 7d after surgery. While at P14,mean IOPs of experimental group 2(9.8 ±2.1 mm Hg),groups 3(8.9 ±2.8 mm Hg) and group 4(7.6 ±2.3 mm Hg)were significantly reduced compared to control group(12.4 ±2.6 mm Hg; n =8, P 【0.05). At P21, mean IOPs of groups 3(11.7±3.2 mm Hg) and group 4(9.9±1.6 mm Hg)were significantly decreased compare to control group(17.9±1.6 mm Hg) and group 2(16.6 ±2.8 mm Hg; n =8,P 【0.05). At P28, mean IOPs of groups 3(13.8±3.3 mm Hg)and group 4(10.6 ±2.0 mm Hg) were also significantly reduced compare to control group(19.4±2.3 mm Hg) and group 2(18.5 ±2.4 mm Hg; n =8, P 【0.05). Meanwhile mean IOP of group 4 is significantly decreased compared to group 3 at P28(n =8, P 【0.05). Survival analysis of functional filtration blub in all groups revealed the longest survival time in group 4(24.9±5.1d) compared to that in group 3(20.6 ±4.3d), group 2(15.0 ±5.2d) and control group(10.1±5.7d).CONCLUSION: Amniotic membrane loaded with 5-FuNPs may function as an effective anti-scarring implant and provides improved long-term surgical outcomes for experimental trabeculectomy in rabbits.
基金This work was financially supported by the Specialized Research Fund for the Doctoral Program of High Education (SRFDP)(No.B20020288015).
文摘Template-free nanosized ZSM-5 seeds with an average size of 15 nm were prepared from a synthesis solution with the composition 12Na2O∶100SiO2∶2Al2O3∶2500H2O. By the use of these seeds, thin ZSM-5 zeolite membranes were prepared on the outer surface of a porous α-alumina tube with a pore size of 2 μm in a gel system by varying-concentration synthesis with organic-free template. The first composition synthesis sol-gel was the same as seeds of molar composition and the second one was 12Na2O∶100SiO2∶2Al2O3∶5000H2O at 180 ℃ for 10 h, respectively. XRD shows that the film consists of well-crystallized ZSM-5 zeolite. SEM investigation indicats that the zeolite films on the supports are defect free and the film thickness is approximately 8 μm. The permeances for H2, N2, CH4 and CO2 are 8.94×10-7, 3.27×10-7, 3.9×10-7, 3.14×10-7 and 0.874×10-7 mol·m2·s-1·Pa-1, respectively. The ideal selectivity of membrane at room temperature for H2/CO2, H2/N2, H2/CH4 are 2.84, 2.73 and 2.29, respectively.
基金Supported by the National Natural Science Foundation of China（21076176） the Research and Development Project of Tangshan（10140201C-3）+1 种基金 the Research and Development Project of Hebei Province（07275113） the Research Fund of Tangshan Normal College
基金Supported by grants from the Danish Medical Research Council
文摘AIM: To study complement activation in 46 patients with alcoholic cirrhosis and ascites but no spontaneous bacterial peritonitis (SBP) and 10 healthy controls. METHODS: Complement activation was determined by the measurement of soluble membrane attack complex (sMAC) concentrations in ascites and plasma. In patients, metabolic liver function was determined by the galactose elimination capacity and the clinical status assessed by the Model of End-Stage Liver Disease and Child-Pugh scores. RESULTS: Ascites sMAC levels were markedly higherthan in the corresponding plasma sample (median (range): 596 (170 - 1519) vs 160 (77 - 848) μg/L; P < 0.01). Ascites sMAC levels correlated positively with liver status. There was no relationship between ascites sMAC and leukocyte count. No relationship between ascites sMAC and blood C-reactive protein, albumin or neutrophile count was found. Plasma sMAC concentrations were slightly higher in patients than in controls [130 μg/L (70 - 204); P = 0.04]. Neither sMAC in ascites nor plasma was related to mortality. CONCLUSION: The increased sMAC concentration in ascites and plasma indicate an activation of the complement system in cirrhosis even in the absence of SBP. This was particularly evident in the peritoneal fluid and most marked in patients with preserved liver status. The high ascites sMAC levels may reflect transudation of membrane attack complexes from the liver. Whether this complement activation has any clinical implications remains to be clarified.
文摘Different types of ABPBI (poly(2,5-benzimidazole)) membranes and polymer binders were evaluated to investigate the performance of MEAs for high temperature proton exchange membrane fuel cell (HT-PEMFC). The properties of the prepared MEAs were evaluated and analyzed by polarization curve, electrochemistry impedance spectroscopy (EIS), cyclic voltammetry (CV) and durability test. The results showed that MEA with modified ABPBI membrane (AM) has satisfactory performance and durability for fuel cell application. Compare to conventional PBI or Nafion binders, polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF) are more attractive as binders in the catalyst layer (CL) of gas diffusion electrode (GDE) for HT-PEMFC.
文摘目的:探究溶酶体相关膜蛋白5(LAMP5)在胃癌中的表达及预后意义。方法:选择胃癌组织130例及其邻近正常胃组织标本40例,采用组织芯片免疫组化检测LAMP5蛋白表达,分析LAMP5表达与患者临床病理特征及预后的关系。通过TCGA数据库验证胃癌与正常胃组织中LAMP5表达差异,LAMP5表达与患者临床病理特征及总体生存期(overall survival,OS)的关系。采用基因富集分析(gene set enrichment analysis,GSEA)研究LAMP5可能的作用机制。结果:组织芯片免疫组化表明,与正常胃组织相比,胃癌组织LAMP5表达增高,LAMP5表达与胃癌分期(P=0.045)、肿瘤大小(P=0.006)相关。Kaplan-Meier生存曲线分析表明,LAMP5表达与胃癌患者OS呈负相关(P=0.035)。TCGA数据分析显示,与正常胃组织相比,胃癌组织中LAMP5表达增高(P=0.016);Kruskal检验表明LAMP5表达与肿瘤分级G3/G1(P=0.024)及G3/G2(P<0.001),分期SⅡ/Ⅰ(P<0.001)、SⅢ/Ⅰ(P<0.001)及SⅣ/Ⅰ(P<0.001),肿瘤大小T2/T1(P=0.002)、T3/T1(P<0.001)、T4/T1(P<0.001)、T3/T2(P=0.026)及T4/T2(P=0.005)相关。Kaplan-Meier生存曲线分析显示LAMP5表达越高,胃癌患者OS越短(P=0.007)。单因素COX回归分析表明,年龄(P=0.006)、分期(P<0.001)、肿瘤大小(P=0.032)、淋巴结转移(P=0.006)、远处转移(P=0.024)和LAMP5表达(P=0.004)可作为胃癌患者的预后指标;多因素COX回归分析表明,年龄(P<0.001)、性别(P=0.047)和LAMP5表达(P<0.001)可作为胃癌患者预后的独立指标。Gene Ontology(GO)富集分析显示,LAMP5可能参与促进胶原结合、细胞外基质结构成分、糖胺聚糖结合、生长因子结合、整合素结合等通路,抑制呼吸作用、线粒体呼吸链复合物组件、呼吸电子传输链、NADH脱氢酶复合物组件、核糖体结构成分等通路。Kyoto Encyclopedia of Genes and Genomes(KEGG)富集分析表明,LAMP5可能促进ECM受体相互作用、焦点粘附、TGF-β信号通路、Hedgehog信号通路、癌症途径等通路,抑制阿尔茨海默病、氧化磷酸化、亨廷顿病、帕金森病、核糖体等通路。结论:LAMP5在胃癌组织中高表达,LAMP5表达越高,患者总体生存期越差,LAMP5可作为胃癌患者预后的独立影响因素。
文摘ZSM-5 zeolite membrane reactor was used in ethylbenzene dehydrogenation to styrene under the circumstances of commercial production.The experimental results indicated that the conversion of ethylbenzene in the membrane reactor increased with increasing pressure of the membrane tube.Using the inert sweep gas instead of vacuumizing, the result of long term steady operation under the same condition showed that the selectivity of styrene increased and the conversion of ethylbenzene in the membrane reactor increased by 7.52% in comparison with the fixed-bed reactor.
