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Updated: Dec 17, 2025
In Vitro Differentiation of Human Mesenchymal Stem Cells into Functional Cardiomyocyte-like Cells
Published on: August 9, 2017
The secretome from embryonic stem cell cardiomyogenesis: Same signals, different cellular feedbacks
Anny W Robert1, Marco A Stimamiglio1
1Laboratório de Biologia Básica de Células-Tronco, Instituto Carlos Chagas, Fiocruz-Paraná, Curitiba, Paraná, Brazil.
Abstract:
Ischemic heart diseases are a global health problem that requires the search for alternative therapies to the current treatments. Thus, an understanding of how cardiomyogenic signals can affect cellular behavior would allow us to create strategies to improve the cell recovery in damaged tissues. In this study, we aimed to evaluate the effects of the conditioned medium (CM), collected at different time points during in vitro cardiomyogenesis of human embryonic stem cells (hESCs), to direct cell behavior. We assayed different cell types to demonstrate noncytotoxic effects from the collected CM and that the CM obtained at initial time points of cardiomyogenic differentiation could promote the cell proliferation. Otherwise, the secretome derived from cardiac committed cells during cardiomyogenesis was unable to improve angiogenesis or migration in endothelial cells, and ineffective to stimulate the differentiation of cardioblasts or increase the differentiation efficiency of hESC. Therefore, we demonstrated that the effectiveness of the CM response varies depending on the cell type and the differentiation step of hESC-derived cardiomyocytes.
Insights
Conditioned medium from early human embryonic stem cell cardiomyogenesis promotes cell proliferation. However, its effectiveness varies by cell type and differentiation stage, impacting therapeutic strategies for heart disease.
Area of Science:
- Cardiovascular Biology
- Stem Cell Biology
- Regenerative Medicine
Background:
- Ischemic heart diseases represent a significant global health challenge, necessitating novel therapeutic approaches beyond current treatments.
- Understanding cardiomyogenic signals is crucial for developing strategies to enhance cell recovery in damaged cardiac tissues.
Purpose of the Study:
- To investigate the effects of conditioned medium (CM) from in vitro cardiomyogenesis of human embryonic stem cells (hESCs) at various time points on cellular behavior.
- To assess the potential of CM to direct cell behavior for therapeutic applications in cardiac repair.
Main Methods:
- Collected conditioned medium (CM) at different stages of in vitro cardiomyogenesis from human embryonic stem cells (hESCs).
- Assayed CM on various cell types to evaluate cytotoxicity, proliferation, angiogenesis, migration, and differentiation.
- Utilized endothelial cells and cardioblasts to assess specific cellular responses to the CM.
Main Results:
- CM collected during early cardiomyogenesis significantly promoted cell proliferation without cytotoxicity.
- CM derived from cardiac-committed cells did not enhance angiogenesis or migration in endothelial cells.
- The secretome was ineffective in stimulating cardioblast differentiation or improving hESC differentiation efficiency.
Conclusions:
- The efficacy of conditioned medium (CM) in influencing cellular behavior is dependent on the specific cell type.
- The stage of human embryonic stem cell (hESC) differentiation significantly impacts the functional outcomes of CM.
- CM shows potential for promoting cell proliferation in early stages, but its application requires careful consideration of cell type and differentiation timing.
