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Targeted cell adhesion on selectively micropatterned polymer arrays on a poly(dimethylsiloxane) surface
Linzhi Tang1, Junhong Min, Eun-Cheol Lee
1Gachon BioNano Research Institute & Division of BioNano Technology and College of BioNano Technology, Kyungwon University, San 65, Bokjeong-dong, Sujeong-gu, Seongnam, Gyeonggi-do 461-701, South Korea.
Biomedical Microdevices
|September 17, 2009
Summary
Researchers created polymer micropatterns on poly(dimethylsiloxane) (PDMS) for controlled cell adhesion. This technique enables selective cell targeting and offers potential for microfluidic devices in diagnostics and drug screening.
Area of Science:
- Biomaterials Engineering
- Surface Science
- Cell Biology
Background:
- Poly(dimethylsiloxane) (PDMS) is widely used in microfluidics due to its biocompatibility and inertness.
- Controlling cell adhesion on surfaces is crucial for various biological applications, including tissue engineering and diagnostics.
- Developing methods for precise micropatterning of cell-adhesive materials is essential for advanced microfluidic devices.
Purpose of the Study:
- To fabricate polymer micropattern arrays on a PDMS surface for selective cell adhesion.
- To investigate the use of a mercapto-ester-based photocurable adhesive for creating robust micropatterns.
- To functionalize the micropatterns with cell-adhesive linkers for enhanced cell targeting.
Main Methods:
- Fabrication of micropattern arrays using a mercapto-ester-based photocurable adhesive on a mercaptosilane-coated PDMS surface.
- Photopolymerization through a photomask to achieve microscale patterned arrays.
- Surface characterization including water contact angle, XPS, FT-IR, and AFM to confirm RGD oligopeptide linker anchoring.
- Cell adhesion studies to evaluate selective targeting on the patterned regions.
Main Results:
- Successful fabrication of robust polymer micropatterns (380 microm in diameter) on PDMS.
- Demonstrated selective cell adhesion and targeting toward the patterned regions.
- Confirmed successful anchoring of RGD oligopeptide linkers on the micropatterned surfaces.
- Established the micropatterning method provides structural rigidity and a highly-adhesive surface.
Conclusions:
- The developed photocurable adhesive micropatterning technique on PDMS enables precise control over cell adhesion.
- Functionalized micropatterns can serve as platforms for selective cell adhesion, crucial for microfluidic applications.
- This approach holds significant potential for developing microfluidic devices for disease diagnosis and high-throughput drug screening.
