尼古丁胺衍生物在生物相容溶液中的-15动态核极化
Josh P Peters1, Arne Brahms2, Vivian Janicaud1
1Section Biomedical Imaging, Molecular Imaging North Competence Center (MOIN CC), Department of Radiology and Neuroradiology, University Medical Center Kiel, Kiel University, Am Botanischen Garten 14, 24118 Kiel, Germany.
Science advances
|August 23, 2023
概括
溶解动态核极化 (dDNP) 提高MRI灵敏度,用于实时代谢成像. 研究人员开发了基于尼古丁胺的标记物,在体内实现了快速的NMRI扫描.
科学领域:
- 医疗成像医学成像
- 生物化学 生物化学
- 核磁共振是一种核磁共振.
背景情况:
- 溶解动态核极化 (dDNP) 显著提高MRI灵敏度 (>10,000x).
- 这使得无创的,实时的体内代谢成像能够实现.
- 尼古丁胺胺 (NAM) 衍生物被探索为新的dDNP极化标记物.
研究的目的:
- 开发和评估用于增强MRI的dDNP极化尼古丁胺 (NAM) 痕迹剂.
- 为了研究高极化N-NAM的取决于场和pH值的寿命.
- 建立一个pH中和程序,以改善低场中性pH成像.
主要方法:
- 1-15N-NAM和1-15N尼古丁酸的合成.
- 使用dDNP的追踪器的超极化,达到高达 (13.0 ± 1.9)%15N极化.
- 在不同的磁场和pH水平上测量N-NAM寿命 (T).
- 开发和应用一个pH中和协议.
- 使用定制的动物探头获得15NMRI.
主要成果:
- 超极化1-15N-NAM表现出场和pH依赖的T1寿命.
- 在pH12和1T时,T1长达41秒,但在中性pH和<1T时,它减少到秒.
- 成功建立了一个独特的pH中和程序.
- 使用开发的方法,在1秒内获得了1-N-NAM的N MRI.
结论:
- 基于尼古丁胺的标记物对dDNP增强的MRI是可行的.
- 优化条件和pH中和对于高效的低场中性pH15NMRI至关重要.
- 使用高极化N-NAM的快速体内代谢成像是可以实现的.
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