合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm...合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm,荧光发射峰分别位于685和689nm。离体光动力抗癌活性表明,该化合物具有显著的光动力抗癌活性,对人肝癌细胞HepG2的半致死浓度(IC50)低至7.8×10-8 mol·L-1。荧光共聚焦显微镜研究显示,SiPcG可定位于细胞线粒体中。研究表明,SiPcG是一种有发展潜力的新型抗癌光敏剂。展开更多
The weakness of visible and near-infrared light penetration depth limits the application of photodynamic therapy(PDT)in deep-seated tumors.Based on the high penetrability of X-rays,X-ray-induced PDT(X-PDT)is a promisi...The weakness of visible and near-infrared light penetration depth limits the application of photodynamic therapy(PDT)in deep-seated tumors.Based on the high penetrability of X-rays,X-ray-induced PDT(X-PDT)is a promising new method for treating deep-seated tumors.However,it requires the development of suitable X-ray-induced sensitizers that could employ X-ray energy to produce reactive oxygen species(ROS)efficiently.In this study,a novel X-rayinduced sensitizer(NanoSRF)was developed through a microemulsion method,in which copper iodine cluster compound Cu_(2)I_(2)(tpp)2(2,5-dm-pz)(CIP)and rose bengal(RB)worked as scintillator and photosensitizer,respectively.CIP was synthesized by a simple mechanical grinding method,and subsequently folic acid(FA)-modified albumin was introduced to enable its alliance with RB.NanoSRF exhibited excellent dispersion stability and generated a large amount of ROS under X-ray irradiation.The results of in vitro studies demonstrated its high selectivity for FA receptor-positive cancer cells.Following systemic administration,NanoSRF accumulated in H22 tumors of xenograft-bearing mice,and Xray irradiation(5.46 Gy)induced a significant inhibition rate of 96.7%in tumor growth.This study pioneers the use of copper iodide cluster as a scintillator in X-PDT,presenting new possibilities for designing scintillators with exceptional X-ray absorption and efficient X-PDT capabilities.展开更多
选用木瓜蛋白酶和中性蛋白酶复合酶法提取鱿鱼内脏油,对其工艺进行优化。在单因素试验基础上,采用正交试验设计,以鱿鱼内脏油提取率为评价指标,分别考察复合酶的物质量比、酶解时间、酶解温度、酶用量等对提取率的影响。结果表明,复合...选用木瓜蛋白酶和中性蛋白酶复合酶法提取鱿鱼内脏油,对其工艺进行优化。在单因素试验基础上,采用正交试验设计,以鱿鱼内脏油提取率为评价指标,分别考察复合酶的物质量比、酶解时间、酶解温度、酶用量等对提取率的影响。结果表明,复合酶的最佳酶解条件为木瓜蛋白酶和中性蛋白酶的物质量比1∶2、p H 7.0、酶解温度55℃、酶解时间5 h、酶用量2.0%。在最佳酶解条件下,鱿鱼内脏油的提取率达78.21%。与单一蛋白酶法相比,复合酶法提取率明显提高。所得的鱼油理化指标达到SC/T 3502—2000粗鱼油二级标准,鱿鱼内脏油中EPA和DHA总含量达30.82%。展开更多
文摘合成了一种轴向核苷修饰硅酞菁,即二[5′-(2′,3′-O-异丙基)-5-甲基胞苷氧基]硅酞菁,并通过1 H NMR和HR-MS等手段进行了表征。该化合物在N,N-二甲基甲酰胺和含1%Cremophor EL水溶液中以单体形式存在,Q带最大吸收波长分别位于676和679nm,荧光发射峰分别位于685和689nm。离体光动力抗癌活性表明,该化合物具有显著的光动力抗癌活性,对人肝癌细胞HepG2的半致死浓度(IC50)低至7.8×10-8 mol·L-1。荧光共聚焦显微镜研究显示,SiPcG可定位于细胞线粒体中。研究表明,SiPcG是一种有发展潜力的新型抗癌光敏剂。
基金supported by the National Natural Science Foundation of China(22178065,22078066 and U1705282).
文摘The weakness of visible and near-infrared light penetration depth limits the application of photodynamic therapy(PDT)in deep-seated tumors.Based on the high penetrability of X-rays,X-ray-induced PDT(X-PDT)is a promising new method for treating deep-seated tumors.However,it requires the development of suitable X-ray-induced sensitizers that could employ X-ray energy to produce reactive oxygen species(ROS)efficiently.In this study,a novel X-rayinduced sensitizer(NanoSRF)was developed through a microemulsion method,in which copper iodine cluster compound Cu_(2)I_(2)(tpp)2(2,5-dm-pz)(CIP)and rose bengal(RB)worked as scintillator and photosensitizer,respectively.CIP was synthesized by a simple mechanical grinding method,and subsequently folic acid(FA)-modified albumin was introduced to enable its alliance with RB.NanoSRF exhibited excellent dispersion stability and generated a large amount of ROS under X-ray irradiation.The results of in vitro studies demonstrated its high selectivity for FA receptor-positive cancer cells.Following systemic administration,NanoSRF accumulated in H22 tumors of xenograft-bearing mice,and Xray irradiation(5.46 Gy)induced a significant inhibition rate of 96.7%in tumor growth.This study pioneers the use of copper iodide cluster as a scintillator in X-PDT,presenting new possibilities for designing scintillators with exceptional X-ray absorption and efficient X-PDT capabilities.
文摘选用木瓜蛋白酶和中性蛋白酶复合酶法提取鱿鱼内脏油,对其工艺进行优化。在单因素试验基础上,采用正交试验设计,以鱿鱼内脏油提取率为评价指标,分别考察复合酶的物质量比、酶解时间、酶解温度、酶用量等对提取率的影响。结果表明,复合酶的最佳酶解条件为木瓜蛋白酶和中性蛋白酶的物质量比1∶2、p H 7.0、酶解温度55℃、酶解时间5 h、酶用量2.0%。在最佳酶解条件下,鱿鱼内脏油的提取率达78.21%。与单一蛋白酶法相比,复合酶法提取率明显提高。所得的鱼油理化指标达到SC/T 3502—2000粗鱼油二级标准,鱿鱼内脏油中EPA和DHA总含量达30.82%。