Related Experiment Video
Updated: Sep 18, 2025
08:19
A Pipeline to Characterize Structural Heart Defects in the Fetal Mouse
Published on: December 16, 2022
2.0K
Patterning Defects in Mice with Defective Ventricular Wall Maturation and Cardiomyopathy
Javier Santos-Cantador1,2, Marcos Siguero-Álvarez1,2, José Luis de la Pompa1,2
1Intercellular Signaling in Cardiovascular Development and Disease Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Calle Melchor Fernández Almagro 3, 28029 Madrid, Spain.
Journal of Cardiovascular Development and Disease
|June 25, 2025
Summary
Investigating mouse ventricular development reveals distinct gene expression domains, unlike the human heart. Altered spatial gene patterns in a cardiomyopathy model highlight their importance in heart maturation.
Area of Science:
- Cardiovascular Biology
- Developmental Biology
- Genetics
Background:
- Ventricular chamber development requires coordinated cardiomyocyte maturation.
- Human fetal hearts show regional gene expression differences, while mouse ventricles appear more homogeneous.
- A transient hybrid cardiomyocyte population exists in mice, expressing both compact and trabecular markers.
Purpose of the Study:
- To investigate cardiomyocyte marker gene expression in developing mouse ventricles using in situ hybridization (ISH).
- To compare gene expression patterns between normal and left ventricular non-compaction cardiomyopathy (LVNC) mouse models.
- To elucidate the role of spatial gene regulation in ventricular development and cardiomyopathy.
Main Methods:
- In situ hybridization (ISH) was used to examine cardiomyocyte marker gene expression.
- Analysis was performed on normal and left ventricular non-compaction cardiomyopathy (LVNC) mouse models.
- Spatial expression patterns of key genes were mapped in developing ventricles.
Main Results:
- Key marker genes in developing mouse ventricles were restricted to compact and trabecular myocardium domains.
- Some markers identified non-cardiomyocyte cell types (endocardial, coronary endothelial), differing from human heart patterns.
- The LVNC model showed altered spatial gene expression, emphasizing the importance of regional organization.
Conclusions:
- Developing mouse ventricles exhibit a less complex regional gene organization compared to the human fetal heart.
- Precise spatial gene expression is critical for normal ventricular wall maturation.
- Spatially regulated gene programs are crucial in ventricular development and may be involved in cardiomyopathy pathogenesis.
