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Temporal expression dynamics of glypicans during hiPSC cardiac differentiation
Fernanda C P Mesquita1,2, Stephanie J Kim1,3, Andreia Z Chignalia4
1Regenerative Medicine Research, The Texas Heart Institute at Baylor College of Medicine, Houston, TX, United States.
Frontiers in Cell and Developmental Biology
|March 13, 2026
Summary
Glypicans (GPCs) are dynamically expressed during human cardiac differentiation from pluripotent stem cells. This study maps their gene expression patterns, providing a reference for future research on extracellular roles in heart development.
Area of Science:
- Stem cell biology
- Developmental biology
- Biochemistry
Background:
- Human pluripotent stem cells (hPSCs) are crucial for modeling cardiac development and generating cardiomyocytes.
- Canonical WNT, BMP, and FGF signaling pathways guide cardiac differentiation, but extracellular components' roles are less understood.
- Glypicans (GPCs) are cell surface proteoglycans involved in developmental signaling.
Purpose of the Study:
- To profile the temporal expression patterns of Glypican 1-6 (GPC1-6) during standard hPSC cardiac differentiation.
- To establish a reference framework for glypican expression during human cardiac development.
Main Methods:
- Chemically defined cardiac differentiation protocol using hPSCs.
- Gene expression analysis (e.g., qPCR, RNA-seq) across multiple differentiation stages.
- Profiling of GPC1-6 expression during WNT activation, inhibition, and cardiac commitment phases.
Main Results:
- Distinct, stage-specific expression patterns were observed for GPC1-6.
- GPC3 and GPC6 upregulated during WNT activation; GPC4 suppressed post-WNT inhibition.
- GPC2 and GPC5 peaked during cardiac progenitor formation; GPC1 increased post-cardiac specification.
Conclusions:
- Glypican family members exhibit dynamic and stage-associated gene expression during hPSC cardiac differentiation.
- This temporal map provides insights into the potential roles of extracellular glypicans in cardiac development.
- Findings may guide future studies on glypican interactions with signaling pathways in heart development.
