在负偏移频率下,二甲基硫氧化物的CEST效应
Haoyun Su1,2, Lok Hin Law1, Yang Liu1,2
1Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, China.
NMR in biomedicine
|August 12, 2024
概括
二甲基硫氧化物 (DMSO) 和类似的溶剂产生独特的化学交换和转移 (CEST) 信号. 这种新的CEST检测方法允许对药物纳米载体和溶剂-药物相互作用进行无标签成像.
科学领域:
- 生物医学应用程序
- 磁共振成像是一种磁共振成像技术.
- 化学交换和转移 (CEST) 是指化学交换和转移.
背景情况:
- 甲基二硫氧化物 (DMSO) 广泛用于生物医学应用,包括作为冷保护剂和药物载体.
- 目前监测药物输送系统的方法可能有限.
研究的目的:
- 研究DMSO产生可检测的化学交换和转移 (CEST) 信号的潜力.
- 探索DMSO-CEST用于成像药物纳米载体的应用.
主要方法:
- 对DMSO及其结构类似物进行了分析,以生成CEST信号.
- 可以通过CEST检测到的巴比酸 (BA) 被溶解在DMSO中并装入脂质体中进行成像.
- 分子相互作用和磁化转移通路的分析,包括中继核Overhauser增强 (rNOE).
主要成果:
- 发现DMSO在大约-2 ppm时产生了明显的CEST信号.
- DMSO的结构类型也在负偏移频率 (-1.4至-3.8 ppm) 的范围内显示了CEST信号.
- 将DMSO和巴比图里酸同时加载到脂质体中,导致可观测的CEST峰值,使得无标签的监测成为可能.
结论:
- 通过与水的相互作用,可以使用CEST MRI检测DMSO等有机溶剂.
- 这为成像药物纳米载体和研究溶剂-药物相互作用提供了一种新的,无标签的方法.
- 这些发现为CEST在生物医学成像和药物输送研究中的应用开辟了新的途径.
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