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Non-invasive Optical Imaging of the Lymphatic Vasculature of a Mouse
Published on: March 8, 2013
Dual-channel in-situ optical imaging system for quantifying lipid uptake and lymphatic pump function
Timothy Kassis1, Alison B Kohan, Michael J Weiler
1Georgia Institute of Technology, Parker H. Petit Institute for Bioengineering and Bioscience, Atlanta, GA, USA.
Journal of Biomedical Optics
|December 11, 2012
Summary
Researchers developed a novel in situ imaging system to track lymphatic function and lipid transport. This tool quantifies lymph flow, vessel contraction, and lipid uptake, aiding research into lymphatic dysfunction and drug delivery.
Area of Science:
- Physiology
- Biomedical Engineering
- Gastroenterology
Background:
- Dietary lipid transport relies heavily on the lymphatic system, but regulatory mechanisms are poorly understood.
- Lymphatic dysfunction is increasingly implicated in lipid-related diseases, highlighting the need for better research tools.
- Understanding lymphatic responses to lipid load is crucial for both basic science and clinical applications.
Purpose of the Study:
- To develop and validate an in situ imaging system for quantifying lymphatic function during lipid transport.
- To correlate lymphatic vessel pump function, lymph flow dynamics, and lipid concentration in real-time.
- To provide a tool for investigating lymphatic roles in health and disease, and for optimizing oral drug delivery.
Main Methods:
- An innovative dual-channel imaging platform combining high-speed bright-field and fluorescence microscopy.
- Automated image processing using custom LabVIEW virtual instruments for quantitative analysis.
- Measurement of lymphatic function via lymphocyte velocity tracking (flow), vessel wall displacement (contraction), and fluorescent lipid analogue uptake (BODIPY FL C16 intensity).
Main Results:
- The system successfully quantifies key parameters of lymphatic function in situ.
- Correlations between vessel pump activity, lymph flow, and lipid concentration were established.
- Demonstrated capability to track lipid uptake using a fluorescent fatty acid analogue.
Conclusions:
- The developed imaging system is a powerful tool for studying intestinal lymphatic physiology.
- It offers valuable insights into the mechanisms of lipid transport and lymphatic dysfunction.
- The system has potential applications in evaluating strategies for lymphatic drug delivery, bypassing first-pass metabolism.
