PURPOSE: To develop a technique with clinical 3.0-T magnetic resonance (MR) imaging to delineate local contrast agent distribution in coronary artery walls for potential molecular MR imaging-guided local gene or drug therapy of atherosclerotic coronary artery disease. MATERIALS AND METHODS: This animal protocol was approved by the institutional animal care and use committee and was in compliance with the Guide for the Care and Use of Laboratory Animals. For in vitro confirmation, human arterial smooth muscle cells (SMCs) were used to determine capability of SMCs in uptake of motexafin gadolinium (MGd) and its optimal dose. For ex vivo evaluation, a 2-mL mixture of MGd and trypan blue was locally infused into coronary artery walls of six cadaveric pig hearts with MR monitoring and an MR imaging guidewire, surface coils, or both. For in vivo validation, the balloon catheter was placed into coronary arteries of seven living pigs, and the MGd and trypan blue mixture was infused into arterial walls with MR guidance. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of coronary artery walls were recorded by using different coils between pre- and postcontrast infusion, with subsequent histologic confirmation. Paired Student t tests were used to compare average SNRs and CNRs of arterial walls before and after contrast agent infusion with different coils. RESULTS: SMCs could take up MGd with the optimal concentration at 150 µmol/L. Average SNR with the MR imaging guidewire and surface coil combination was significantly higher than that with the MR imaging guidewire only or with surface coils only (P < .05), and average SNR and CNR of postinfusion MR imaging was significantly higher than that of preinfusion MR imaging (P < .05). Histologic analysis was used to confirm successful intracoronary infiltration of MGd and trypan blue within coronary artery walls. CONCLUSION: MR imaging can be used to delineate locally infused contrast agent distribution in coronary artery walls. This establishes groundwork for development of molecular MR imaging-guided intracoronary therapy.
PURPOSE: To develop a technique with clinical 3.0-T magnetic resonance (MR) imaging to delineate local contrast agent distribution in coronary artery walls for potential molecular MR imaging-guided local gene or drug therapy of atherosclerotic coronary artery disease. MATERIALS AND METHODS: This animal protocol was approved by the institutional animal care and use committee and was in compliance with the Guide for the Care and Use of Laboratory Animals. For in vitro confirmation, human arterial smooth muscle cells (SMCs) were used to determine capability of SMCs in uptake of motexafin gadolinium (MGd) and its optimal dose. For ex vivo evaluation, a 2-mL mixture of MGd and trypan blue was locally infused into coronary artery walls of six cadaveric pig hearts with MR monitoring and an MR imaging guidewire, surface coils, or both. For in vivo validation, the balloon catheter was placed into coronary arteries of seven living pigs, and the MGd and trypan blue mixture was infused into arterial walls with MR guidance. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of coronary artery walls were recorded by using different coils between pre- and postcontrast infusion, with subsequent histologic confirmation. Paired Student t tests were used to compare average SNRs and CNRs of arterial walls before and after contrast agent infusion with different coils. RESULTS: SMCs could take up MGd with the optimal concentration at 150 µmol/L. Average SNR with the MR imaging guidewire and surface coil combination was significantly higher than that with the MR imaging guidewire only or with surface coils only (P < .05), and average SNR and CNR of postinfusion MR imaging was significantly higher than that of preinfusion MR imaging (P < .05). Histologic analysis was used to confirm successful intracoronary infiltration of MGd and trypan blue within coronary artery walls. CONCLUSION: MR imaging can be used to delineate locally infused contrast agent distribution in coronary artery walls. This establishes groundwork for development of molecular MR imaging-guided intracoronary therapy.
Authors: Gabriele A Krombach; Martin Wehner; Alberto Perez-Bouza; Linda Kaimann; Sylvia Kinzel; Thorsten Plum; Daniel Schibur; Michael Friebe; Rolf W Günther; Christian Hohl Journal: Invest Radiol Date: 2008-07 Impact factor: 6.016
Authors: K W Woodburn; Q Fan; D Kessel; M Wright; T D Mody; G Hemmi; D Magda; J L Sessler; W C Dow; R A Miller; S W Young Journal: J Clin Laser Med Surg Date: 1996-10
Authors: Eric Larose; Scott Kinlay; Andrew P Selwyn; Yerem Yeghiazarians; E Kent Yucel; Daniel F Kacher; Peter Libby; Peter Ganz Journal: Atherosclerosis Date: 2007-03-27 Impact factor: 5.162
Authors: Christoph Stettler; Simon Wandel; Sabin Allemann; Adnan Kastrati; Marie Claude Morice; Albert Schömig; Matthias E Pfisterer; Gregg W Stone; Martin B Leon; José Suarez de Lezo; Jean-Jacques Goy; Seung-Jung Park; Manel Sabaté; Maarten J Suttorp; Henning Kelbaek; Christian Spaulding; Maurizio Menichelli; Paul Vermeersch; Maurits T Dirksen; Pavel Cervinka; Anna Sonia Petronio; Alain J Nordmann; Peter Diem; Bernhard Meier; Marcel Zwahlen; Stephan Reichenbach; Sven Trelle; Stephan Windecker; Peter Jüni Journal: Lancet Date: 2007-09-15 Impact factor: 79.321