Journal
EUROPEAN JOURNAL OF RADIOLOGY
Volume 84, Issue 9, Pages 1685-1693Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.ejrad.2015.03.016
Keywords
Molecular imaging; Microbubbles; Ultrasound; Cancer; Inflammation; Clinical translation
Funding
- NCI NIH HHS [R01 CA155289-01A1, R01 CA155289] Funding Source: Medline
- NIDDK NIH HHS [R01DK092509-01A1, R01 DK092509] Funding Source: Medline
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Ultrasound is a widely available, cost-effective, real-time, non-invasive and safe imaging modality widely used in the clinic for anatomical and functional imaging. With the introduction of novel molecularly-targeted ultrasound contrast agents, another dimension of ultrasound has become a reality: diagnosing and monitoring pathological processes at the molecular level. Most commonly used ultrasound molecular imaging contrast agents are micron sized, gas-containing microbubbles functionalized to recognize and attach to molecules expressed on inflamed or angiogenic vascular endothelial cells. There are several potential clinical applications currently being explored including earlier detection, molecular profiling, and monitoring of cancer, as well as visualization of ischemic memory in transient myocardial ischemia, monitoring of disease activity in inflammatory bowel disease, and assessment of arteriosclerosis. Recently, a first clinical grade ultrasound contrast agent (BR55), targeted at a molecule expressed in neoangiogenesis (vascular endothelial growth factor receptor type 2; VEGFR2) has been introduced and safety and feasibility of VEGFR2-targeted ultrasound imaging is being explored in first inhuman clinical trials in various cancer types. This review describes the design of ultrasound molecular imaging contrast agents, imaging techniques, and potential future clinical applications of ultrasound molecular imaging. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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