磁共振成像(MRI)被广泛用于识别不同的疾病。已对用于增强MRI信号的MRI造影剂进行了广泛研究,以进行精确诊断。基于大分子MRI造影剂具有更高的造影成像能力和更长的循环时间的优势,本文对最常见的微分子造影剂(Gd-二亚乙基三胺五乙酸[DTPA])进行了修饰。2条长的饱和脂族链连接到DTPA的两侧。合成了具有12、14和16个碳长度的DTPA衍生物,并将其螯合为Gd 3+。获得了3种两亲性MRI造影剂,并使用质谱对其结构进行了表征,其中1种1 H NMR和傅立叶变换红外。此外,测量化合物的表面张力,并且通过将合成的两亲分子与卵卵磷脂和胆固醇混合来制备脂质体。使用透射电子显微镜(TEM),动态光散射(DLS)和Zeta电位测量研究了脂质体的组装行为。透射电镜显示脂质体具有双层囊泡结构。通过DLS测定的脂质体尺寸分布为10至1000nm,并且随着脂族链长的增加,多分散指数(PDI)和ζ电势增加
磁共振成像(MRI)被广泛用于识别不同的疾病。已对用于增强MRI信号的MRI造影剂进行了广泛研究,以进行精确诊断。基于大分子MRI造影剂具有更高的造影成像能力和更长的循环时间的优势,本文对最常见的微分子造影剂(Gd-二亚乙基三胺五乙酸[DTPA])进行了修饰。2条长的饱和脂族链连接到DTPA的两侧。合成了具有12、14和16个碳长度的DTPA衍生物,并将其螯合为Gd 3+。获得了3种两亲性MRI造影剂,并使用质谱对其结构进行了表征,其中1种1 H NMR和傅立叶变换红外。此外,测量化合物的表面张力,并且通过将合成的两亲分子与卵卵磷脂和胆固醇混合来制备脂质体。使用透射电子显微镜(TEM),动态光散射(DLS)和Zeta电位测量研究了脂质体的组装行为。透射电镜显示脂质体具有双层囊泡结构。通过DLS测定的脂质体尺寸分布为10至1000nm,并且随着脂族链长的增加,多分散指数(PDI)和ζ电势增加
Following the stability of amphiphilic nanoaggregates by using intermolecular energy transfer
作者:M. Harris、H. De Keersmaecker、L. Vander Elst、E. Debroye、Y. Fujita、H. Mizuno、T. N. Parac-Vogt
DOI:10.1039/c6cc07714e
日期:——
An intermolecularenergytransfer system is developed for studying nanoaggregate(s) (NAs) stability in complex solution and cell culture by one- and two-photon fluorescence microscopy and optical imaging. The system allows...
Multi-arm amine compounds and compositions for enhancing intracellular, in vitro, and in vivo delivery of drug, active, and therapeutic substances including ribonucleic acids. This disclosure provides novel compounds and compositions for making and using delivery materials and carriers which increase the efficiency of delivery of biologically active and pharmacologically active molecules. Embodiments of this disclosure may further provide delivery of various therapeutic agents including nucleic acid therapeutics such as regulatory RNA, interfering RNA, and agents for RNAi, as well as other protein and peptide therapeutics. In some aspects, this disclosure provides multi-arm amine compounds and compositions which can enhance permeation of a drug substance.
[EN] MULTI-ARM AMINES AND USES THEREOF<br/>[FR] AMINES À BRAS MULTIPLES ET LEURS UTILISATIONS
申请人:MDRNA INC
公开号:WO2009148955A2
公开(公告)日:2009-12-10
Multi-arm amine compounds and compositions for enhancing intracellular, in vitro, and in vivo delivery of drug, active, and therapeutic substances including ribonucleic acids. This disclosure provides novel compounds and compositions for making and using delivery materials and carriers which increase the efficiency of delivery of biologically active and pharmacologically active molecules. Embodiments of this disclosure may further provide delivery of various therapeutic agents including nucleic acid therapeutics such as regulatory RNA, interfering RNA, and agents for RNAi, as well as other protein and peptide therapeutics. In some aspects, this disclosure provides multi-arm amine compounds and compositions which can enhance permeation of a drug substance.