基于人血清白蛋白和氧化物的对比剂用于H-MRI和Overhauser增强型MRI
Dmitry Mitin1, Friedemann Bullinger2, Sergey Dobrynin3
1Institute of Chemical Biology and Fundamental Medicine SB RAS, 630090 Novosibirsk, Russia.
International journal of molecular sciences
|April 13, 2024
概括
这项研究开发了基于人血清白蛋白的新型对比剂 (HSA-NIT),用于增强MRI. 这些药物表现出潜力,既可以作为基于放松的,也可以作为癌症诊断的切割性超极化药物.
科学领域:
- 生物医学成像技术 生物医学成像技术
- 纳米技术纳米技术
- 生物化学 生物化学
背景情况:
- 磁共振成像 (MRI) 依赖于对比剂来改善癌症诊断.
- 通过Overhauser动态核极化 (ODNP) 增强的MRI (OMRI) 提供了更高的灵敏度.
- 开发新的,有效和安全的对比剂对于推进MRI至关重要.
研究的目的:
- 为了合成和表征一种新的宏分子构造 (HSA-NIT) 用于MRI.
- 评估HSA-NIT作为H-MRI的无金属放松基对比剂.
- 评估HSA-NIT作为OMRI的可切割超极化对比剂 (HCAs).
主要方法:
- 使用一种新的合成方法创建HSA-NIT,具有很高的氧化物修饰 (21残留物/蛋白质).
- 鉴定包括EPR光谱,MALDI ToF MS,凝电泳和圆形二重化.
- 在各种磁场强度 (1.88-14 T) 进行了放松度测量.
- 在模拟癌症组织条件下,在超低磁场 (ULF) 上研究了ODNP增强.
主要成果:
- 与原生白蛋白相比,HSA-NITs没有显著的结构变化或细胞毒性.
- 在3T和14T时,HSA-NIT显示出作为T1-和T2加权对比剂的潜力.
- 在模拟癌症的蛋白质溶解后,HSA-NIT释放了激活ODNP的片段,产生了显著的增强 (RREmaxRRR 40-50).
- 更高的修改度增强了对生物降解的Overhauser效应.
结论:
- HSA-NITs代表了一种有前途的新型无金属MRI放松式对比剂.
- 可切割的HSA-NIT结合物显示出作为OMRI的新型超极化对比剂的潜力.
- 这些药物为先进的癌症诊断提供双模式的能力.
关键词:
超频动态核极化 (ODNP) 增强磁共振成像 (OMRI) 超频动态核极化人类血清白蛋白的人类血清白蛋白.磁共振成像技术的使用亚氧化物 亚氧化物有机激素对比剂 有机激素对比剂旋转探测器探测器的旋转更多相关视频
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