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Micropatterned coumarin polyester thin films direct neurite orientation.
Aleesha M McCormick1, Murthy V S N Maddipatla, Shuojia Shi
1Chemical and Biomolecular Engineering and ‡Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States.
ACS Applied Materials & Interfaces
|October 28, 2014
Summary
Researchers developed new micropatterned coumarin polyester films using digital micromirror device technology to guide nerve cell growth. These films show promise for enhancing axon guidance and future nervous system regeneration strategies.
Area of Science:
- Biomaterials Science
- Neuroscience
- Regenerative Medicine
Background:
- Nervous system regeneration is crucial for development, maturation, and repair.
- Peripheral nervous system (PNS) axons struggle to bridge injury gaps, and central nervous system (CNS) regeneration is limited due to innate injury responses.
- Biodegradable coumarin polyester thin films offer potential as cell guidance substrates for in vivo applications.
Purpose of the Study:
- To fabricate and evaluate coumarin polyester thin films micropatterned using a digital micromirror device (DMD) as substrates for nervous system cell guidance.
- To investigate the ability of these micropatterned surfaces to enhance the alignment of neurons, oligodendrocytes, and astrocytes.
Main Methods:
- Fabrication of coumarin polyester thin films into 10×20 μm and 15×50 μm micropatterns with depths of 15–20 nm using DMD.
- Isolation of adult primary neurons, oligodendrocytes, and astrocytes from rat brain tissue.
- Seeding cells onto patterned and control (unpatterned) polymer and glass surfaces, followed by analysis of cell type and neurite alignment using phase contrast and fluorescence imaging after 24 hours.
Main Results:
- Significant cell process alignment was observed on micropatterned surfaces compared to controls (p<0.0001).
- Alignment percentages for emergence and orientation angles on micropatterned surfaces ranged from 42% to 49%, significantly higher than control groups (12% to 22%).
- Cell processes demonstrated sensitivity to topographical cues, aligning preferentially along features like the plateau/channel interface.
Conclusions:
- DMD-fabricated coumarin polyester micropatterned thin films effectively guide nervous system cell alignment.
- These materials show significant potential as axon guidance platforms for advancing nervous system regenerative strategies.
- The study highlights the ability of cells to sense and respond to nanoscale topographical features for directed growth.
Keywords:
Axon guidancecortical neuronsglial cellsmicropatterned polymersnanotopographynervous system regenerationphotoreactive polymers
