In vivo par fluorescence dans le proche infrarouge (NIRF) intravasculaire d'imagerie moléculaire de la plaque inflammatoire, une approche multimodale d'imagerie de l'athérosclérose

Overview

This study introduces a novel near-infrared fluorescence (NIRF) catheter designed for 2-dimensional intravascular molecular imaging of plaque biology in vivo. The catheter enables visualization of key biological processes, such as inflammation, by detecting plaque-avid activatable and targeted NIR fluorochromes.

Key Study Components

Area of Science

• Intravascular imaging
• Cardiovascular biology
• Fluorescence imaging techniques

Background

• Atherosclerosis is a significant health concern characterized by plaque buildup in arteries.
• Current imaging techniques may not effectively visualize inflammatory processes within plaques.
• Near-infrared fluorescence offers a promising approach for real-time imaging of biological processes.
• This study utilizes a rabbit model to explore the capabilities of the NIRF catheter.

Purpose of Study

• To develop and validate a new NIRF catheter for imaging plaque biology.
• To assess the catheter's ability to visualize inflammation in atherosclerotic plaques.
• To establish a multimodal imaging strategy for enhanced visualization of vascular biology.

Methods Used

• Creation of an experimental model of atherosclerosis in New Zealand white rabbits.
• Injection of an NIRF Activat Nanosensor to label inflamed plaques.
• Use of coregistered arterial angiography and intravascular ultrasound.
• Ex vivo fluorescence reflectance imaging and immunohistochemical analysis of dissected arteries.

Main Results

• The NIRF catheter successfully visualized inflammatory plaques in vivo.
• Quantitative imaging of plaque biology was achieved using multimodal techniques.
• Results demonstrated the catheter's potential for clinical application in human coronary arteries.
• Findings support further development of targeted imaging strategies for cardiovascular diseases.

Conclusions

• The NIRF catheter represents a significant advancement in intravascular imaging technology.
• It provides a valuable tool for studying plaque biology and inflammation.
• Future applications may enhance diagnostic capabilities in cardiovascular medicine.

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