Related Experiment Video
Updated: Aug 13, 2026
Aggregate Size Optimization in Microwells for Suspension-based Cardiac Differentiation of Human Pluripotent Stem Cells
Published on: September 25, 2016
Polystyrene microplastics size as a key localization determinant for isolated adult cardiomyocytes
Alzbeta Marcek Chorvatova1,2, Michal Cagalinec3, Ljuba Bacharova1
1Department of Biophotonics, International Laser Center, Slovak Center of Scientific and Technical Information, Bratislava, Slovakia.
Abstract:
There is growing evidence of the cytotoxic effects of micro- and nanoplastics (MPs) on the cardiovascular system. However, the proof of their direct interaction with living cardiomyocytes is limited. This study aimed to analyze the interaction of polystyrene (PS) MPs with freshly isolated adult cardiomyocytes. The primary cardiomyocytes from adult rat hearts were exposed to solutions with MPs of different sizes (20, 100, 200, 500, 1000, and 2000 nm, respectively) for up to six hours. We observed that small MPs, sized 20 nm, showed mostly intracellular localization, and MPs sized 100 nm had partial intracellular location. On the other hand, MPs sized 200-1000 nm had predominantly surface localization. The larger MPs, sized 2000 nm, did not interact with the cardiomyocytes. These findings reveal the complexity of MPs-induced interaction with cardiac cells and suggest the size of the MPs as one of the key localization determinants for these cells.
Insights
Micro- and nanoplastics (MPs) interact differently with cardiac cells based on size. Smaller MPs enter cardiomyocytes, while larger ones remain on the surface, revealing size-dependent interactions with heart cells.
Area of Science:
- Environmental Science
- Toxicology
- Cardiovascular Biology
Background:
- Growing evidence links micro- and nanoplastics (MPs) to cardiovascular toxicity.
- Direct interaction data between MPs and living cardiomyocytes remains limited.
Purpose of the Study:
- To investigate the interaction between polystyrene (PS) MPs and adult rat cardiomyocytes.
- To determine how MP size influences cellular localization within cardiomyocytes.
Main Methods:
- Primary adult rat cardiomyocytes were isolated.
- Cells were exposed to polystyrene MPs ranging from 20 nm to 2000 nm for up to six hours.
Main Results:
- 20 nm MPs were primarily found intracellularly.
- 100 nm MPs showed partial intracellular localization.
- 200-1000 nm MPs predominantly localized to the cell surface.
- 2000 nm MPs did not interact with cardiomyocytes.
Conclusions:
- MP size is a critical determinant of cellular localization in cardiomyocytes.
- Findings highlight the complex nature of MP-cardiac cell interactions.
- Understanding these interactions is crucial for assessing cardiovascular risks of plastic pollution.
