TREATING WATER INSOLUBLE NANOPARTICLES WITH HYDROPHILIC ALPHA-HYDROXYPHOSPHONIC ACID CONJUGATES, THE SO MODIFIED NANOPARTICLES AND THEIR USE AS CONTRAST AGENTS
申请人:Bales Brian Christopher
公开号:US20110104072A1
公开(公告)日:2011-05-05
The present application discloses treating water insoluble nanoparticles, particularly nanoparticles of metals and metal compounds which find utility in diagnostic imaging such as MR and X-ray imaging, with an alpha-hydroxyphosphonic acid conjugate with a hydrophilic moiety to render the nanoparticles sufficiently hydrophilic to find utility in diagnostic imaging. Among the modified hydrophilic nanoparticles disclosed are those in which the hydrophilic moieties of the modifying conjugate are ethylene oxide based polymers and copolymers and zwitterions and the nanoparticles are composed of transition metal oxides such as superparamagnetic iron oxide and tantalum oxide. Disclosed are nanoparticles which are sufficiently hydrophilic to form stable aqueous colloidal suspensions. Also disclosed is diagnostic imaging such as MR and X-ray using the modified hydrophilic nanoparticles as contrast agents.
本申请公开了一种处理水不溶性纳米颗粒的方法,特别是金属和金属化合物的纳米颗粒,这些纳米颗粒在诊断成像中(如磁共振和X射线成像)中发挥作用,使用具有亲水基团的α-羟基膦酸共轭物处理,使纳米颗粒具有足够的亲水性以在诊断成像中发挥作用。公开的改性亲水性纳米颗粒包括那些改性共轭物的亲水基团为乙烯氧化物基聚合物和共聚物以及带电离子的纳米颗粒,这些纳米颗粒由过渡金属氧化物组成,如超顺磁性氧化铁和氧化钽。公开了足够亲水的纳米颗粒,以形成稳定的水性胶体悬浊液。还公开了使用改性亲水性纳米颗粒作为对比剂进行诊断成像,如磁共振和X射线成像。