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Bridging the Bio-Electronic Interface with Biofabrication
Published on: June 6, 2012
"Smart" biopolymer for a reversible stimuli-responsive platform in cell-based biochips
Kyunga Na1, Jaeyeon Jung, Okgene Kim
1Department of Biosystems and Biomaterials Science and Engineering, Intelligent Textile Research Center, and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, 151-742 Korea.
Langmuir : the ACS Journal of Surfaces and Colloids
|March 20, 2008
Summary
Smart elastin-like polypeptide (ELP) surfaces enable reversible cell adhesion for biochips. ELP micropatterns control cell attachment and detachment using temperature or salt concentration changes.
Area of Science:
- Biomaterials Science
- Surface Chemistry
- Cell Biology
Background:
- Smart material surfaces are crucial for advanced cell-based biochips.
- Elastin-like polypeptides (ELPs) exhibit tunable phase transitions in response to stimuli.
- Controllable cell adhesion is essential for microdevice functionality.
Purpose of the Study:
- To develop ELP-based surfaces for reversible cell adhesion.
- To investigate the influence of solution conditions on ELP phase transition.
- To demonstrate the utility of ELP micropatterns in cell-based microdevices.
Main Methods:
- Genetically synthesized lysine-containing ELP (ELP-K) for surface conjugation.
- Prepared ELP micropatterns on aldehyde-modified glass via microcontact printing.
- Utilized UV-visible spectroscopy, atomic force microscopy, and time-of-flight secondary ion mass spectroscopy for characterization.
Main Results:
- Observed significant differences in ELP transition temperature (Tt) between PBS and cell culture media.
- Confirmed successful immobilization of ~4 nm thick ELP monolayers on micropatterned surfaces.
- Demonstrated reversible fibroblast adhesion and detachment by modulating temperature below and above Tt.
Conclusions:
- ELP micropatterns offer a reliable and reproducible platform for stimuli-responsive cell adhesion.
- The smart properties of ELP are suitable for applications in cell-based microdevices.
- Tunable phase transitions of ELP provide precise control over cell attachment and detachment.
