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Is polydopamine beneficial for cells on the modified surface?
Yue Yu1, Xiuli Wang1, Yi Zhu1
1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China.
Regenerative Biomaterials
|November 3, 2022
Summary
Polydopamine (PDA) coatings, widely used for cell adhesion, were found to decrease cell viability. This effect is contact-dependent, not due to chemical toxicity, impacting cell number and motility.
Area of Science:
- Biomaterials Science
- Cell Biology
- Surface Chemistry
Background:
- Polydopamine (PDA) coatings are biomimetic materials widely used to enhance cell adhesion on various substrates.
- The intrinsic effects of PDA coatings on cell behavior, independent of bound bioactive substances, remain largely uncharacterized.
- Understanding PDA's direct impact is crucial for optimizing its application in biomedical and tissue engineering fields.
Purpose of the Study:
- To investigate the direct effect of polydopamine (PDA) coatings on cell viability and behavior.
- To determine if PDA itself, rather than bound substances, influences cell adhesion and proliferation.
- To elucidate the mechanism behind PDA's impact on cell viability under standard culture conditions.
Main Methods:
- Utilized human bone marrow mesenchymal stem cells as a model system on PDA-coated tissue culture plates.
- Assessed cell viability, cell number, and cell motility (global and local) on PDA coatings versus control surfaces.
- Examined the time-dependent effects of PDA coatings on cellular responses.
- Investigated the contact-dependent nature of the observed phenomenon.
Main Results:
- PDA coatings significantly decreased cell viability under normal culture conditions.
- The observed decrease in cell viability was attributed to a reduction in cell number, not reduced viability per cell.
- Cellular migration patterns were altered, showing reduced global migration but increased local motility on PDA surfaces.
- The inhibitory effect was contact-dependent and not caused by free PDA or inherent chemical cytotoxicity.
Conclusions:
- Polydopamine coatings can negatively impact cell viability through a contact-dependent mechanism.
- The enhanced cell adhesion to PDA surfaces influences cell motility and proliferation, leading to decreased cell numbers.
- These findings highlight the importance of considering the intrinsic properties of PDA coatings when designing biomaterial interfaces for cell culture and tissue engineering.
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