中华超声影像学杂志
中華超聲影像學雜誌
중화초성영상학잡지
CHINESE JOURNAL OF ULTRASONOGRAPHY
2011年
6期
533-536
,共4页
张海%李莹%唐建熹%杨俊%陈俊汇%吴瑛
張海%李瑩%唐建熹%楊俊%陳俊彙%吳瑛
장해%리형%당건희%양준%진준회%오영
超声检查%PLGA纳米粒%转染
超聲檢查%PLGA納米粒%轉染
초성검사%PLGA납미립%전염
Ultrasonography%PLGA nanoparticles%Transfection
目的 通过研究不同超声参数与绿色荧光蛋白表达之间的关系,探讨超声辐照促进绿色荧光蛋白基因(GFP)与雄激素受体抗体标记的PLGA纳米颗粒(NP-PLGA-GFP-AR)的体内降解与释放的作用.方法 建立人前列腺癌PC-3细胞裸鼠动物模型,将NP-PLGA-GFP-AR纳米粒注射于瘤内2 h后,对癌瘤使用不同强度和类型的超声进行局部辐照,通过激光共聚焦荧光显微镜观察GFP表达,从而评价转染效果.结果 粒径优选后的纳米粒能稳定转染GFP与雄激素受体抗体标记的DNA质粒,超声辐照组较非辐照组的GFP表达提前,占空比为50%的连续波超声较脉冲波超声对前列腺癌的转染效果好.结论 优化后的超声辐照可有效靶向增强体内DNA转染,局部超声辐照结合特异PLGA纳米粒能有效用于DNA靶向递送.
目的 通過研究不同超聲參數與綠色熒光蛋白錶達之間的關繫,探討超聲輻照促進綠色熒光蛋白基因(GFP)與雄激素受體抗體標記的PLGA納米顆粒(NP-PLGA-GFP-AR)的體內降解與釋放的作用.方法 建立人前列腺癌PC-3細胞裸鼠動物模型,將NP-PLGA-GFP-AR納米粒註射于瘤內2 h後,對癌瘤使用不同彊度和類型的超聲進行跼部輻照,通過激光共聚焦熒光顯微鏡觀察GFP錶達,從而評價轉染效果.結果 粒徑優選後的納米粒能穩定轉染GFP與雄激素受體抗體標記的DNA質粒,超聲輻照組較非輻照組的GFP錶達提前,佔空比為50%的連續波超聲較脈遲波超聲對前列腺癌的轉染效果好.結論 優化後的超聲輻照可有效靶嚮增彊體內DNA轉染,跼部超聲輻照結閤特異PLGA納米粒能有效用于DNA靶嚮遞送.
목적 통과연구불동초성삼수여록색형광단백표체지간적관계,탐토초성복조촉진록색형광단백기인(GFP)여웅격소수체항체표기적PLGA납미과립(NP-PLGA-GFP-AR)적체내강해여석방적작용.방법 건립인전렬선암PC-3세포라서동물모형,장NP-PLGA-GFP-AR납미립주사우류내2 h후,대암류사용불동강도화류형적초성진행국부복조,통과격광공취초형광현미경관찰GFP표체,종이평개전염효과.결과 립경우선후적납미립능은정전염GFP여웅격소수체항체표기적DNA질립,초성복조조교비복조조적GFP표체제전,점공비위50%적련속파초성교맥충파초성대전렬선암적전염효과호.결론 우화후적초성복조가유효파향증강체내DNA전염,국부초성복조결합특이PLGA납미립능유효용우DNA파향체송.
Objective To investigate the feasibility and the efficacy of ultrasound in promoting PLGA nanoparticle-mediated gene transfection in vivo.Methods Prostate cancer cell line PC-3 was used to generate xenografts in nude mice for gene transfection experiment in vivo.GFP plasmid was encapsulated in PLGA-based nanoparticles.Nanoparticles were injected into tumors locally.Two hours later,xenografts were exposed to ultrasound.Xenograft tissues were harvested in different time points to assess the efficiency of gene expression with regard to different parameters of ultrasound. Results PLGA nanoparticle-encapsulated GFP plasmids were readily transfected to PC-3 cells in vivo.A large number of GFP expressing cells were observed after exposed to ultrasound with 1.0 MHz 50% duty factor continuous wave.In comparison,ultrasound exposure with 40% duty factor pulse wave in vivo had low efficacy in terms of GFP expression.No animal death was noticed due to ultrasound exposure.Conclusions Ultrasound exposure can enhance the release of plasmid DNA content delivered by PLGA nanoparticles in vivo,local exposure to ultrasound wave would be used in conjunction with PLGA nanoparticle-mediated targeted delivery to the tissue or organ of interest.