动脉斑块内骨桥蛋白靶向的新型超声对比剂的制备及体外实验研究

doi:10.11915/j.issn.1671-5403.2017.05.087

CORC > 北京大学 > 工学院

	动脉斑块内骨桥蛋白靶向的新型超声对比剂的制备及体外实验研究; Preparation of a novel ultrasound contrast agent targeting osteopontin in arterial plaque and its application in vitro
	苟田田 ; 陈敏 ; 王亚斌 ; 韩东 ; 乔红玉 ; 黄旭 ; 许梦琪 ; 汪奇 ; 戴志飞 ; 冯旭阳 ; 曹丰
刊名	中华老年多器官疾病杂志
	2017
关键词	骨桥蛋白聚乳酸靶向纳米探针超声造影剂 osteopontin poly lactic acid nanoprobe ultrasound contrast agent
DOI	10.11915/j.issn.1671-5403.2017.05.087
英文摘要	目的骨桥蛋白(OPN)在动脉易损斑块中高表达,本研究通过构建偶联骨桥蛋白(OPN)抗体的聚乳酸(PLA)纳米颗粒,实现OPN的超声纳米分子成像.方法通过乳化溶剂挥发法制备包裹液态氟碳的PLA纳米颗粒,经碳二亚胺法进行聚乙二醇(PEG)亲水性修饰和OPN抗体偶联,得到OPN靶向的超声成像纳米探针.对探针进行表征,CCK-8法检测探针毒性,激光共聚焦显微镜评估细胞摄取,超声诊断仪进行体外超声成像.结果 PLA纳米颗粒呈球形或类球形,水合粒径为(267.60±82.40)nm;CCK-8毒性实验显示,经不同浓度探针(0.00~0.50 mg/ml)的孵育后,各实验组与空白对照组比较细胞活性差异无统计学意义(P>0.05);靶向OPN的纳米颗粒在泡沫细胞内摄取明显增多(P<0.05);乳胶管超声成像见纳米探针在反向脉冲谐波成像(PIHI)模式下显示为点状密集高回声影像.结论本实验构建的靶向OPN纳米探针生物相容性好,能够在体外与OPN高表达的泡沫细胞模型特异性结合,超声成像效果良好.; Objective Osteopontin (OPN) is highly expressed in vulnerable atherosclerotic plaques and suggested to be a good bio-marker and imaging target.This study was aimed at designing poly lactic acid (PLA) nanoparticles coupled with OPN antibodies for OPN-targeted ultrasonic molecular imaging.Methods PLA-perfluorooctyl bromide nanoparticles (PLA-PFOB NPs) were prepared by oil-in-water emulsion process.Subsequently, amino polyethylene glycol carboxyl (NH2-PEG-COOH) was attached to PLA through carbodiimide method.OPN antibody was conjugated with PEG-PLA-PFOB NPs by amide bonds to obtain OPN-targeted nanoprobe for ultrasound imaging.The biocompatibility of PLA NPs was evaluated in RAW264.7 cells by CCK-8 assay.Morphological characterizations of the probes were detected by transmission electron microscopy and particle size analyzer.Sensibility of the probes was evaluated by cellular uptake assay under laser scanning confocal microscope.Ultrasonic imaging was conducted with enhanced ultrasonography with PLA NPs as contrast agent.Results The PLA NPs were sphere or spherical in shape, with a hydrodynamic size of (267.60±82.40)nm.CCK-8 assay revealed that the nanoprobes showed negligible cytotoxicity at a dose from 0.00 to 0.50 mg/ml in foam cells, and no significant difference was observed in cell viability in different groups of cells (P>0.05).Cellular uptake assay also showed there were obviously large amount of the nanoparticle in the foam cells (P<0.05).Ultrasound imaging showed the probes presented fine punctuate hyper echo with no attenuation for the rear echo in the latex tubes on the pulse inversion harmonic image.Conclusion Our prepared OPN-targeted ultrasound contrast nanoprobes are of high biocompatibility, and can specifically bind to OPN highly expressed foam cells, and have excellent ultrasound signals in contrast-enhanced ultrasound imaging.; 国家自然科学基金; 国家杰出青年基金(81325009) This work was supported by the National Natural Science Foundation of China; the National Outstanding Youth Fund of China; 5; 374-378; 16
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/488346]
专题	工学院
推荐引用方式 GB/T 7714	苟田田,陈敏,王亚斌,等. 动脉斑块内骨桥蛋白靶向的新型超声对比剂的制备及体外实验研究, Preparation of a novel ultrasound contrast agent targeting osteopontin in arterial plaque and its application in vitro[J]. 中华老年多器官疾病杂志,2017.
APA	苟田田.,陈敏.,王亚斌.,韩东.,乔红玉.,...&曹丰.(2017).动脉斑块内骨桥蛋白靶向的新型超声对比剂的制备及体外实验研究.中华老年多器官疾病杂志.
MLA	苟田田,et al."动脉斑块内骨桥蛋白靶向的新型超声对比剂的制备及体外实验研究".中华老年多器官疾病杂志 (2017).