宫颈癌的发生与人乳头瘤病毒(HPV)感染密切相关。治疗HPV感染可有效预防宫颈癌。洛匹那韦(LPV)是Food and Drug Administration(FDA)批准的抗艾滋病病毒的治疗药物,研究发现洛匹那韦具有抗HPV病毒的活性。本工作旨在制备一种负载LPV的...宫颈癌的发生与人乳头瘤病毒(HPV)感染密切相关。治疗HPV感染可有效预防宫颈癌。洛匹那韦(LPV)是Food and Drug Administration(FDA)批准的抗艾滋病病毒的治疗药物,研究发现洛匹那韦具有抗HPV病毒的活性。本工作旨在制备一种负载LPV的纳米胶束复合水凝胶载药系统,探究其通过阴道黏膜局部给药的性能。采用两亲性聚合物维生素E聚乙二醇琥珀酸酯(TPGS)和助渗透剂牛磺脱氧胆酸钠(STDC)自组装制备混合载药胶束(TPGS-STDC/LPV),混合胶束分散在温敏凝胶中形成载药纳米胶束复合温敏水凝胶(NMCH)。对TPGS-STDC/LPV的粒径、ZETA电位、形貌、包封率、载药量和释药等进行了检测,还测试了NMCH的黏膜粘附性、药物释放、透皮渗透和抗病毒活性等。实验结果表明,TPGS-STDC/LPV具有高药物包封率、高载药量,累积释放率达(96.82±2.93)%(pH=4.5,72 h),表现出酸响应释放性能;复合水凝胶具有适宜人体的温敏特性,对阴道上皮黏膜具有优异的粘附性,所制备的NMCH的LPV渗透率最好,为(54.05±2.74)%,约为游离LPV的7.4倍;NMCH具有显著的抗HPV病毒活性。该体系适合用于阴道局部给药。展开更多
The evolution of pore structure and functional groups of coal char in different stages of Shenhua coal combustion process in O_(2)/CO_(2)atmosphere was studied by the low temperature nitrogen adsorption method,the sca...The evolution of pore structure and functional groups of coal char in different stages of Shenhua coal combustion process in O_(2)/CO_(2)atmosphere was studied by the low temperature nitrogen adsorption method,the scanning electron microscopy and the FTIR method.The relationship between the pore structure,oxygen-containing functional groups and NO generation characteristics of coal char under different inlet oxygen concentrations was analyzed.The result shows that the overall pore structure and shape of pulverized coal particles change continuously with the combustion;and the oxygen-containing functional groups on the surface of coal char indicate multi-peak changes and are related to NO generation.The oxygen concentration poses a larger impact on the change in coal particle size,oxygen-containing functional groups and NO generation;and there is an oxygen concentration that optimizes the reduction effect of the oxygen-containing functional group on NO.展开更多
文摘宫颈癌的发生与人乳头瘤病毒(HPV)感染密切相关。治疗HPV感染可有效预防宫颈癌。洛匹那韦(LPV)是Food and Drug Administration(FDA)批准的抗艾滋病病毒的治疗药物,研究发现洛匹那韦具有抗HPV病毒的活性。本工作旨在制备一种负载LPV的纳米胶束复合水凝胶载药系统,探究其通过阴道黏膜局部给药的性能。采用两亲性聚合物维生素E聚乙二醇琥珀酸酯(TPGS)和助渗透剂牛磺脱氧胆酸钠(STDC)自组装制备混合载药胶束(TPGS-STDC/LPV),混合胶束分散在温敏凝胶中形成载药纳米胶束复合温敏水凝胶(NMCH)。对TPGS-STDC/LPV的粒径、ZETA电位、形貌、包封率、载药量和释药等进行了检测,还测试了NMCH的黏膜粘附性、药物释放、透皮渗透和抗病毒活性等。实验结果表明,TPGS-STDC/LPV具有高药物包封率、高载药量,累积释放率达(96.82±2.93)%(pH=4.5,72 h),表现出酸响应释放性能;复合水凝胶具有适宜人体的温敏特性,对阴道上皮黏膜具有优异的粘附性,所制备的NMCH的LPV渗透率最好,为(54.05±2.74)%,约为游离LPV的7.4倍;NMCH具有显著的抗HPV病毒活性。该体系适合用于阴道局部给药。
基金the National Key R&D Program of China(2017YFB0601805)support from the Natural Science Foundation of China(51376008)。
文摘The evolution of pore structure and functional groups of coal char in different stages of Shenhua coal combustion process in O_(2)/CO_(2)atmosphere was studied by the low temperature nitrogen adsorption method,the scanning electron microscopy and the FTIR method.The relationship between the pore structure,oxygen-containing functional groups and NO generation characteristics of coal char under different inlet oxygen concentrations was analyzed.The result shows that the overall pore structure and shape of pulverized coal particles change continuously with the combustion;and the oxygen-containing functional groups on the surface of coal char indicate multi-peak changes and are related to NO generation.The oxygen concentration poses a larger impact on the change in coal particle size,oxygen-containing functional groups and NO generation;and there is an oxygen concentration that optimizes the reduction effect of the oxygen-containing functional group on NO.
