铜响应磁共振成像对比剂的对比剂.
Emily L Que1, Eliana Gianolio, Suzanne L Baker
1Department of Chemistry, University of California, Berkeley, California 94720, USA.
Journal of the American Chemical Society
|June 4, 2009
概括
新的Copper-Gad (CG) 对比剂在铜结合时增强MRI放松性. 这些药物具有很高的选择性,并通过MRI可视化铜水平的变化.
科学领域:
- 化学生物学 化学生物学
- 医疗成像医学成像
- 纳米技术纳米技术
背景情况:
- 磁共振成像 (MRI) 对比剂对于医学诊断至关重要.
- 开发响应性对比剂,信号特定的分析剂是一个活跃的研究领域.
- 铜离子在生物过程中起着至关重要的作用,它们的失调与疾病有关.
研究的目的:
- 设计,合成和评估一种新的铜激活MRI对比剂家族,称为Copper-Gad (CG).
- 研究这些药物中铜诱导的放松性切换的机制.
- 评估CG传感器在使用MRI可视化铜水平变化的潜力.
主要方法:
- 合成的铜-Gad (CG) 家庭,具有Gd(3+) -DO3A核心与丰富的受体结合.
- 在存在或缺少铜离子 (Cu+和Cu2+) 的情况下,对纵向放松度 (r(1) 的评估.
- 对竞争金属离子的选择性评估和使用 (17) O NMR 和核磁放松分散 (NMRD) 的机制阐明.
- T(1) 权重的幻影MRI来展示铜水平变化的可视化.
主要成果:
- CG剂具有较低的基线放松性,在结合Cu+或Cu2+时显著增加.
- 在Cu+结合后,CG2和CG3的放松性增加了360%.
- 传感器显示铜离子对Zn2+等其他生物相关金属离子具有很高的选择性.
- 机制研究表明,铜结合会改变Gd(3+) 协调环境,增加放松性.
结论:
- 铜-Gad (CG) 家族代表了一类新的有效的铜激活MRI对比剂.
- 这些药物为基于MRI的非侵入性检测和量化铜水平提供了有前途的工具.
- 开发的传感器在诊断和监测与铜失调相关的疾病方面具有潜在的应用.
相关概念视频
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
01:14Imaging Studies I: CT and MRI
Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
01:21Imaging Studies for Cardiovascular System IV: CMRI
Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
03:02Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
01:27Imaging Studies IV: Magnetic Resonance Imaging
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...