Imaging techniques for visualizing and phenotyping congenital heart defects in murine models

Area of Science:

• Developmental Biology
• Cardiovascular Research
• Medical Imaging

Background:

• Mouse models are crucial for studying congenital heart disease (CHD) genetics and development.
• Accurate cardiovascular phenotyping for diagnosing structural heart defects in mice is challenging.
• High-throughput phenotyping tools are emerging with advancements in imaging technology.

Purpose of the Study:

• To review and discuss the efficacy of four distinct imaging modalities for diagnosing congenital heart defects in fetal and neonatal mice.
• To evaluate the utility of these techniques in large-scale genetic screens.
• To underscore the importance of advanced imaging for understanding CHD etiology.

Main Methods:

• Noninvasive fetal echocardiography
• Micro-computed tomography (micro-CT)
• Micro-magnetic resonance imaging (micro-MRI)
• Episcopic fluorescence image capture (EFIC) histopathology

Main Results:

• The discussed imaging modalities have been validated in a large-scale mouse mutagenesis screen.
• These techniques effectively diagnose structural heart defects in the small hearts of fetal and newborn mice.
• The experience gained confirms the efficacy of these cutting-edge phenotyping tools.

Conclusions:

• Advanced imaging techniques are essential for precise diagnosis of congenital heart defects in mouse models.
• These phenotyping tools significantly enhance the study of the developmental origins of congenital heart disease.
• The validated efficacy of these methods will accelerate research into CHD etiology.