NAMI-A[imidazolium trans-tetrachloro(dimethylsulfoxide)imidazoleruthenium(Ⅲ)] shows extraordinary activities against metastatic tumors. However, the hydrolysis of NAMI-A to produce dimethyl sulfoxide(DMSO) could redu...NAMI-A[imidazolium trans-tetrachloro(dimethylsulfoxide)imidazoleruthenium(Ⅲ)] shows extraordinary activities against metastatic tumors. However, the hydrolysis of NAMI-A to produce dimethyl sulfoxide(DMSO) could reduce anti-metastatic activity. To enhance the circulation time and the anti-metastatic effect of NAMI-A, NAMI-A-loaded nanoparticles were prepared by the double emulsion method and characterized by scanning electron microscopy for surface morphology, laser light scattering for size and zeta potential for surface charges. Controlled release of NAMI-A was observed in a sustained manner. Compared with free NAMI-A, NAMI-A-loaded nanoparticles exhibited superior antitumor effect by delaying tumor growth in T739 mice. PLGA-mPEG nanoparticles are promising for further studies as drug delivery carriers.展开更多
5-Fluorouracil（5-FU） loaded nanoparticles（NPs） were prepared by a high speed shearing double emulsion method with polylactide-co-glycolide-co-methoxy poly（ethylene glycol）（PLGA-mPEG） as loading material. The p...5-Fluorouracil（5-FU） loaded nanoparticles（NPs） were prepared by a high speed shearing double emulsion method with polylactide-co-glycolide-co-methoxy poly（ethylene glycol）（PLGA-mPEG） as loading material. The prepared NPs possess a negative zeta potential and their loading efficiency is about 15%（mass fraction）. The result of in vitro release shows that the release behavior of 5-FU from NPs is coincident with Zero-level release from the second day.展开更多
目的考察HepG2.2.15细胞对同时包载丁香苦苷和羟基酪醇纳米粒(nanoparticles co-loaded with syringopicroside and hydroxytyrosol,SH-NPs)的摄取机制。方法采用沉淀法制备SH-NPs,以异硫氰酸荧光素为荧光标记物,采用流式细胞仪研究HepG...目的考察HepG2.2.15细胞对同时包载丁香苦苷和羟基酪醇纳米粒(nanoparticles co-loaded with syringopicroside and hydroxytyrosol,SH-NPs)的摄取机制。方法采用沉淀法制备SH-NPs,以异硫氰酸荧光素为荧光标记物,采用流式细胞仪研究HepG2.2.15细胞对SH-NPs的摄取机制。结果秋水仙素为抑制剂,孵育时间在0.5~24 h范围内,阳性细胞百分数由1.9%增加到56.4%;药物浓度为125、250、500μg/m L时,阳性细胞百分数分别为4.9%、3.4%、3.9%。氯喹为抑制剂,孵育时间在0.5~24 h范围内,阳性细胞百分数由7.4%增加到55.4%;药物浓度为125、250、500μg/m L时,阳性细胞百分数分别为19.5%、22.5%、27.6%。结论秋水仙素与氯喹对HepG2.2.15细胞摄取有抑制作用,且HepG2.2.15细胞对SH-NPs的摄取与药物浓度、孵育时间呈正相关,推断HepG2.2.15细胞对SH-NPs细胞的摄取机制为非特异性吸附内吞。展开更多
基金Supported by the National Natural Science Foundation of China(No.20871056)the Planned Item of Science and Technology of Guangdong Province, China (No.C1011220800060)the "211" Project Grant of Jinan University.
文摘NAMI-A[imidazolium trans-tetrachloro(dimethylsulfoxide)imidazoleruthenium(Ⅲ)] shows extraordinary activities against metastatic tumors. However, the hydrolysis of NAMI-A to produce dimethyl sulfoxide(DMSO) could reduce anti-metastatic activity. To enhance the circulation time and the anti-metastatic effect of NAMI-A, NAMI-A-loaded nanoparticles were prepared by the double emulsion method and characterized by scanning electron microscopy for surface morphology, laser light scattering for size and zeta potential for surface charges. Controlled release of NAMI-A was observed in a sustained manner. Compared with free NAMI-A, NAMI-A-loaded nanoparticles exhibited superior antitumor effect by delaying tumor growth in T739 mice. PLGA-mPEG nanoparticles are promising for further studies as drug delivery carriers.
基金Supported by the National Natural Basic Research Program of China(No. 2007CB80800)the Special Foundation of Harbin Technical Innovation for Talental Person(No. 2006RFQXS075)
文摘5-Fluorouracil（5-FU） loaded nanoparticles（NPs） were prepared by a high speed shearing double emulsion method with polylactide-co-glycolide-co-methoxy poly（ethylene glycol）（PLGA-mPEG） as loading material. The prepared NPs possess a negative zeta potential and their loading efficiency is about 15%（mass fraction）. The result of in vitro release shows that the release behavior of 5-FU from NPs is coincident with Zero-level release from the second day.
文摘目的考察HepG2.2.15细胞对同时包载丁香苦苷和羟基酪醇纳米粒(nanoparticles co-loaded with syringopicroside and hydroxytyrosol,SH-NPs)的摄取机制。方法采用沉淀法制备SH-NPs,以异硫氰酸荧光素为荧光标记物,采用流式细胞仪研究HepG2.2.15细胞对SH-NPs的摄取机制。结果秋水仙素为抑制剂,孵育时间在0.5~24 h范围内,阳性细胞百分数由1.9%增加到56.4%;药物浓度为125、250、500μg/m L时,阳性细胞百分数分别为4.9%、3.4%、3.9%。氯喹为抑制剂,孵育时间在0.5~24 h范围内,阳性细胞百分数由7.4%增加到55.4%;药物浓度为125、250、500μg/m L时,阳性细胞百分数分别为19.5%、22.5%、27.6%。结论秋水仙素与氯喹对HepG2.2.15细胞摄取有抑制作用,且HepG2.2.15细胞对SH-NPs的摄取与药物浓度、孵育时间呈正相关,推断HepG2.2.15细胞对SH-NPs细胞的摄取机制为非特异性吸附内吞。
