Noninvasive Tracking of Embryonic Cardiac Dynamics and Development with Volumetric Optoacoustic Spectroscopy.

Area of Science:

• Developmental Biology
• Cardiovascular Research
• Biomedical Imaging

Background:

• Noninvasive cardiac monitoring is crucial for preventing adult cardiac anomalies.
• Mouse models are vital for studying mammalian cardiac development and disease.
• Analyzing embryonic mouse hearts noninvasively is challenging due to their small size, rapid motion, and uterine embedding.

Purpose of the Study:

• To develop a novel platform for high-resolution, noninvasive functional analysis of embryonic cardiac development in mice.
• To enable real-time, whole-heart visualization and quantification of cardiac dynamics and blood oxygenation in developing mouse embryos.

Main Methods:

• Development of a real-time volumetric optoacoustic spectroscopy (VOS) platform.
• Achieved high spatial resolution (100 µm) and temporal resolution (10 ms) for whole-heart visualization.
• Utilized time-lapse 4D imaging and spectroscopic recordings for quantitative analysis.

Main Results:

• Successfully visualized embryonic heart development in mouse models from gestational days 14.5 to 17.5.
• Quantified cardiac dynamics and blood oxygenation status in heart chambers noninvasively and label-free.
• Demonstrated the platform's capability for high-resolution, real-time functional assessment of embryonic hearts.

Conclusions:

• The developed VOS platform offers unprecedented capabilities for noninvasive, high-resolution quantification of embryonic heart function in mammalian models.
• This technology provides a valuable tool for developmental biology research, facilitating early detection and understanding of cardiac anomalies.
• Opens new avenues for studying cardiac development and disease progression throughout gestation.