A new manganese-based oral contrast agent (CMC-001) for liver MRI: pharmacological and pharmaceutical aspects

医学 磁共振成像 磁共振造影剂 对比度(视觉) 核磁共振 放射科 化学 物理 有机化学 人工智能 计算机科学
作者
Jan Trøst Jørgensen,Matthias Rief,Torkel B. Brismar,Moritz Wagner,Nils Albiin
出处
期刊:Acta Radiologica [SAGE]
卷期号:53 (7): 707-713 被引量:6
标识
DOI:10.1258/ar.2012.120034
摘要

Manganese is one of the most abundant metals on earth and is found as a component of more than 100 different minerals. Besides being an essential trace element in relation to the metabolic processes in the body, manganese is also a paramagnetic metal that possesses similar characteristics to gadolinium with regards to T1-weighted (T1-w) magnetic resonance imaging (MRI). Manganese, in the form of manganese (II) chloride tetrahydrate, is the active substance in a new targeted oral contrast agent, currently known as CMC-001, indicated for hepatobiliary MRI. Under physiological circumstances manganese is poorly absorbed from the intestine after oral intake, but by the use of specific absorption promoters, L-alanine and vitamin D 3 , it is possible to obtain a sufficiently high concentration in the liver in order to achieve a significant signal enhancing effect. In the liver manganese is exposed to a very high first-pass effect, up to 98%, which prevents the metal from reaching the systemic circulation, thereby reducing the number of systemic side-effects. Manganese is one of the least toxic trace elements, and due to its favorable safety profile it may be an attractive alternative to gadolinium-based contrast agents for patients undergoing an MRI evaluation for liver metastases in the future. In this review the basic pharmacological and pharmaceutical aspects of this new targeted oral hepatobiliary specific contrast agent will be discussed.
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