Quantitative "magnetic resonance immunohistochemistry" with ligand-targeted (19)F nanoparticles. Export

@article{citeulike:2235275, abstract = {Unstable atherosclerotic plaques exhibit microdeposits of fibrin that may indicate the potential for a future rupture. However, current methods for evaluating the stage of an atherosclerotic lesion only involve characterizing the level of vessel stenosis, without delineating which lesions are beginning to rupture. Previous work has shown that fibrin-targeted, liquid perfluorocarbon nanoparticles, which carry a high payload of gadolinium, have a high sensitivity and specificity for detecting fibrin with clinical (1)H MRI. In this work, the perfluorocarbon content of the targeted nanoparticles is exploited for the purposes of (19)F imaging and spectroscopy to demonstrate a method for quantifiable molecular imaging of fibrin in vitro at 4.7 T. Additionally, the quantity of bound nanoparticles formulated with different perfluorocarbon species was calculated using spectroscopy. Results indicate that the high degree of nanoparticle binding to fibrin clots and the lack of background (19)F signal allow accurate quantification using spectroscopy at 4.7 T, as corroborated with proton relaxation rate measurements at 1.5 T and trace element (gadolinium) analysis. Finally, the extension of these techniques to a clinically relevant application, the evaluation of the fibrin burden within an ex vivo human carotid endarterectomy sample, demonstrates the potential use of these particles for uniquely identifying unstable atherosclerotic lesions in vivo.}, address = {Department of Medicine, Washington University, Saint Louis, Missouri 63110, USA.}, author = {Morawski, Anne M. and Winter, Patrick M. and Yu, Xin and Fuhrhop, Ralph W. and Scott, Michael J. and Hockett, Franklin and Robertson, J. David and Gaffney, Patrick J. and Lanza, Gregory M. and Wickline, Samuel A.}, citeulike-article-id = {2235275}, citeulike-linkout-0 = {http://dx.doi.org/10.1002/mrm.20287}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/15562481}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=15562481}, citeulike-linkout-3 = {http://www3.interscience.wiley.com/cgi-bin/abstract/109800308/ABSTRACT}, doi = {10.1002/mrm.20287}, issn = {0740-3194}, journal = {Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine}, keywords = {19fluorine-spectroscopy, atherosclerotic-plaque, crown-ether-nanoparticle, ex-vivo-human-carotid-arteries, fibrin-clots, gadolinium, mri, perfluorocarbon-nanoparticle, sccne}, month = {December}, number = {6}, pages = {1255--1262}, posted-at = {2008-01-15 16:19:42}, priority = {4}, title = {Quantitative "magnetic resonance immunohistochemistry" with ligand-targeted (19)F nanoparticles.}, url = {http://dx.doi.org/10.1002/mrm.20287}, volume = {52}, year = {2004} }

TY - JOUR ID - citeulike:2235275 L3 - citeulike-article-id:2235275 N2 - Unstable atherosclerotic plaques exhibit microdeposits of fibrin that may indicate the potential for a future rupture. However, current methods for evaluating the stage of an atherosclerotic lesion only involve characterizing the level of vessel stenosis, without delineating which lesions are beginning to rupture. Previous work has shown that fibrin-targeted, liquid perfluorocarbon nanoparticles, which carry a high payload of gadolinium, have a high sensitivity and specificity for detecting fibrin with clinical (1)H MRI. In this work, the perfluorocarbon content of the targeted nanoparticles is exploited for the purposes of (19)F imaging and spectroscopy to demonstrate a method for quantifiable molecular imaging of fibrin in vitro at 4.7 T. Additionally, the quantity of bound nanoparticles formulated with different perfluorocarbon species was calculated using spectroscopy. Results indicate that the high degree of nanoparticle binding to fibrin clots and the lack of background (19)F signal allow accurate quantification using spectroscopy at 4.7 T, as corroborated with proton relaxation rate measurements at 1.5 T and trace element (gadolinium) analysis. Finally, the extension of these techniques to a clinically relevant application, the evaluation of the fibrin burden within an ex vivo human carotid endarterectomy sample, demonstrates the potential use of these particles for uniquely identifying unstable atherosclerotic lesions in vivo. IS - 6 JF - Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine SN - 0740-3194 AD - Department of Medicine, Washington University, Saint Louis, Missouri 63110, USA. EP - 1262 TI - Quantitative "magnetic resonance immunohistochemistry" with ligand-targeted (19)F nanoparticles. VL - 52 SP - 1255 KW - 19fluorine-spectroscopy KW - atherosclerotic-plaque KW - crown-ether-nanoparticle KW - ex-vivo-human-carotid-arteries KW - fibrin-clots KW - gadolinium KW - mri KW - perfluorocarbon-nanoparticle KW - sccne AU - Morawski, Anne AU - Winter, Patrick AU - Yu, Xin AU - Fuhrhop, Ralph AU - Scott, Michael AU - Hockett, Franklin AU - Robertson, David AU - Gaffney, Patrick AU - Lanza, Gregory AU - Wickline, Samuel PY - 2004/12// UR - http://dx.doi.org/10.1002/mrm.20287 ER -