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Updated: Aug 4, 2026

Generation of Human Cardiomyocytes: A Differentiation Protocol from Feeder-free Human Induced Pluripotent Stem Cells
Published on: June 28, 2013
Flagellin-Induced Immune Response in Human-Induced Pluripotent Stem Cell-Derived Cardiomyocytes
Goekhan Yuecel1,2, Xiaobo Zhou1,2, Linda Terkatz1,3
1Department of Cardiology, Angiology, Haemostaseology and Medical Intensive Care, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, 68167 Mannheim, Germany.
Pathogen-associated molecular patterns (PAMPs) trigger septic cardiomyopathy via toll-like receptor (TLR) signaling. This study shows human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) can model PAMP-induced immune responses in heart cells.
Area of Science:
- Immunology
- Cardiology
- Stem Cell Biology
Background:
- Sepsis-induced cardiomyopathy involves pathogen-associated molecular patterns (PAMPs) and toll-like receptor (TLR) immune responses.
- Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) offer a model for studying cardiomyocyte innate immunity.
Purpose of the Study:
- To investigate PAMP-induced alterations in hiPSC-CMs.
- To assess the utility of hiPSC-CMs as an in vitro model for studying PAMP-mediated cardiomyocyte responses.
Main Methods:
- hiPSC-CMs from two healthy donors were exposed to flagellin (FLA), a PAMP.
- Assessed cytokine expression (TNFα), inflammatory pathways (caspase-8), TLR5 signaling, reactive oxygen species, and surface antigens using PCR, ELISA, and FACS.
Main Results:
- Higher FLA doses increased TNFα and caspase-8 expression.
- Prolonged FLA exposure elevated TLR5 expression and its cell surface proportion.
- FLA induced detectable innate immune responses in hiPSC-CMs.
Conclusions:
- hiPSC-CMs effectively model PAMP-induced innate immune responses in cardiomyocytes.
- This in vitro model can be used to study mechanisms of septic cardiomyopathy.
- TLR-mediated signaling is a key pathway in PAMP-induced cardiomyocyte inflammation.
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