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Título: | Environmentally sensitive paramagnetic and diamagnetic contrast agents for nuclear magnetic resonance imaging and spectroscopy |
Autor: | Pacheco-Torres, Jesús CSIC ORCID ; Calle, Daniel CSIC ORCID CVN; Lizarbe, Blanca CSIC ORCID; Negri, Viviana CSIC ORCID; Ubide, Carmen; Fayos, Rosa CSIC; López-Larrubia, Pilar CSIC ORCID; Ballesteros, Paloma CSIC ORCID; Cerdán, Sebastián CSIC ORCID | Palabras clave: | Saturation-transfer cest MRI contrast Fluorinated 2-nitroimidazole Diffusion-tensor Tumor hypoxia Acetamide sr-4554 |
Fecha de publicación: | ene-2011 | Editor: | Bentham Science Publishers | Citación: | Current Topics in Medicinal Chemistry 11(1): 115-130 (2011) | Resumen: | Even though alterations in the microenvironmental properties of tissues underlie the development of the most prevalent and morbid pathologies, they are not directly observable in vivo by Magnetic Resonance Imaging (MRI) or Spectroscopy (MRS) methods. This circumstance has lead to the development of a wide variety of exogenous paramagnetic and diamagnetic MRI and MRS probes able to inform non invasively on microenvironmental variables such as pH, pO(2), ion concentration o even temperature. This review covers the fundamentals of environmental contrast and the current arsenal of endogenous and exogenous MRI and MRS contrast enhancing agents available to visualize it. We begin describing the physicochemical background necessary to understand paramagnetic and diamagnetic contrast enhancement with a special reference to novel magnetization transfer and C-13 hiperpolarization strategies. We describe then the main macrocyclic structures used to support the environmentally sensitive paramagnetic sensors, including CEST and PARACEST pH sensitive probes, temperature probes and enzyme activity or gene expression activatable probes. Finally we address the most commonly used diamagnetic contrast agents including imidazolic derivatives to reveal extracellular pH and tissue pO(2) values by MRS. The potential applications of these agents in mutimodal and molecular imaging approaches are discussed. | Versión del editor: | http://dx.doi.org/10.2174/156802611793611904 | URI: | http://hdl.handle.net/10261/32661 | DOI: | 10.2174/156802611793611904 | ISSN: | 1568-0266 |
Aparece en las colecciones: | (IIBM) Artículos |
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Current topics in medicinal chemistry 2011 vol11 n1 pp115.pdf | 2,3 MB | Adobe PDF | Visualizar/Abrir |
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