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Microbubble-endothelial cell interactions as a basis for assessing endothelial function
Flordeliza S Villanueva1, Alexander Klibanov, William R Wagner
1University of Pittsburgh School of Medicine, Pennsylvania 15213, USA. villanuevafs@msx.upmc.edu
Insights
Endothelial dysfunction, a precursor to coronary artery disease, can now be detected noninvasively. Targeted ultrasound imaging offers a promising new method for early identification and potential treatment of this vascular condition.
Area of Science:
- Cardiovascular Medicine
- Vascular Biology
- Medical Imaging
Background:
- Endothelial dysfunction precedes clinical coronary artery disease by decades, contributing to atherosclerosis and ischemic syndromes.
- It is also implicated in cardiac transplant rejection and post-procedural complications after angioplasty or surgery.
- Endothelial dysfunction correlates with coronary risk factors and is potentially reversible, making early detection crucial.
Purpose of the Study:
- To explore targeted ultrasound imaging as a novel, noninvasive method for detecting endothelial dysfunction.
- To present preliminary studies on the application of targeted ultrasound for endothelial assessment.
- To discuss potential diagnostic and therapeutic applications in various cardiovascular disease states.
Main Methods:
- Utilizing myocardial contrast echocardiography with microbubbles.
- Targeting microbubbles to cell surface markers specific to dysfunctional endothelial cells.
- Employing clinical ultrasound imaging techniques for noninvasive detection.
Main Results:
- Preliminary studies demonstrate the feasibility of targeted ultrasound for endothelial assessment.
- This approach may allow for the noninvasive detection of endothelial disease.
- The technique shows potential for broader diagnostic and therapeutic applications.
Conclusions:
- Targeted ultrasound imaging represents a promising approach for the noninvasive detection of endothelial dysfunction.
- Early identification of endothelial dysfunction is clinically significant due to its link to cardiovascular disease and potential reversibility.
- Further research and development could expand its use in diagnosing and treating various vascular conditions.
Abstract:
Clinical signs and symptoms of coronary artery disease are predated in decades by endothelial dysfunction, an aberration in the vascular lining that permits the development and propagation of atherosclerotic lesions and vasomotor dysfunction in the arterial circulation. These ultimately lead to acute and chronic coronary ischemic syndromes. Other pathophysiologic scenarios encountered in clinical cardiology practice, such as cardiac transplant rejection and the period following coronary angioplasty or cardiac surgery, also are associated with endothelial dysfunction. Endothelial dysfunction parallels coronary risk factors and is potentially reversible, rendering early identification of the phenomenon a clinically important endpoint. Current methods for detecting endothelial dysfunction are limited, however. Myocardial contrast echocardiography using microbubbles targeted to bind to cell surface markers uniquely expressed by dysfunctional endothelial cells may offer an approach to the noninvasive detection of endothelial disease using clinical ultrasound imaging techniques. This article will discuss the concept of targeted ultrasound imaging and present preliminary studies in this area as applied to endothelial assessment. Potential applications to other disease states, both diagnostic and therapeutic, also are discussed.