2024-03-29T12:57:12Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/326612022-07-16T01:01:05Zcom_10261_22com_10261_1col_10261_275
Environmentally sensitive paramagnetic and diamagnetic contrast agents for nuclear magnetic resonance imaging and spectroscopy
Pacheco-Torres, Jesús
Calle, Daniel
Lizarbe, Blanca
Negri, Viviana
Ubide, Carmen
Fayos, Rosa
López-Larrubia, Pilar
Ballesteros, Paloma
Cerdán, Sebastián
Ministerio de Educación y Ciencia (España)
Comunidad de Madrid
Universidad Nacional de Educación a Distancia (España)
European Commission
Consejo Superior de Investigaciones Científicas (España)
Saturation-transfer cest
MRI contrast
Fluorinated 2-nitroimidazole
Diffusion-tensor
Tumor hypoxia
Acetamide sr-4554
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.
This work was supported in part by grants: CTQ2006-06505/BQU, CTQ2009-14146-C01/C02, to P.B. and P.L.L., S-BIO/0179/2006 and SAF2008/01381 to SC and EU MEDITRANS Integrated Project NMP4-CT-
2006-02668 to S.C., P.L.L. and P.B. J. P-
T, D. C., B.L. and V.N. are predoctoral fellows from the Community of Madrid and CSIC and V.N. and C.U hold contracts from UNED
2011-02-22T10:54:30Z
2011-02-22T10:54:30Z
2011-01
artículo
http://purl.org/coar/resource_type/c_6501
Current Topics in Medicinal Chemistry 11(1): 115-130 (2011)
1568-0266
http://hdl.handle.net/10261/32661
10.2174/156802611793611904
http://dx.doi.org/10.13039/501100005367
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100003339
http://dx.doi.org/10.13039/100012818
en
#PLACEHOLDER_PARENT_METADATA_VALUE#
S2006/BIO-0179/MULTIMAG
Preprint
http://dx.doi.org/10.2174/156802611793611904
Sí
open
Bentham Science Publishers