Cardiac differentiation roadmap for analysis of plasticity and balanced lineage commitment.

Area of Science:

• Cardiovascular Biology
• Developmental Biology
• Stem Cell Research

Background:

• Stem cell models are crucial for studying human heart development.
• Existing models like monolayers and 3D organoids have varying cell compositions and maturity.
• Understanding cardiac lineage commitment is essential for regenerative medicine.

Purpose of the Study:

• To create a single-cell roadmap comparing cardiac differentiation trajectories.
• To identify key regulators of atrial and ventricular cardiomyocyte lineages.
• To elucidate the roles of ZNF711 and retinoic acid in cardiac lineage commitment.

Main Methods:

• Utilized a multiomic approach for comprehensive analysis.
• Employed gene-regulatory network inference to identify key factors.
• Compared differentiation trajectories across monolayer, embryoid body, and engineered heart tissue models.

Main Results:

• Identified ZNF711 as a critical switch for cardiomyocyte commitment.
• Demonstrated that ZNF711 ablation diverts progenitors away from cardiomyocytes.
• Showed retinoic acid rescues ZNF711-deficient lineage commitment and promotes atrial cardiomyocyte differentiation.

Conclusions:

• ZNF711 acts as a safeguard for cardiomyocyte differentiation.
• An interplay exists between ZNF711 and retinoic acid in directing cardiac cell fate.
• This provides insights into controlling cardiomyocyte development for therapeutic applications.