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Related Experiment Videos

Patterned cell adhesion by self-assembled structures for use with a CMOS cell-based biosensor.

W Franks1, S Tosatti, F Heer

  • 1ETH Zürich, Physical Electronics Laboratory, ETH Hönggerberg, Wolfgang-Pauli-Strasse 16, HPT H 4.2, 8122 Binz bei Maur, Switzerland. wendy_franks@mckinsey.com

Biosensors & Bioelectronics
|October 24, 2006
PubMed
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Researchers developed a new surface engineering technique for precise cell adhesion control. This method uses selective molecular-assembly patterning (SMAP) to guide cell growth on biosensors for improved electrical activity recording.

Area of Science:

  • Biomaterials Science
  • Surface Chemistry
  • Cell Biology

Background:

  • Precise control over cell adhesion is crucial for developing advanced biosensors and tissue engineering applications.
  • Existing methods for patterning cell adhesion often involve complex or costly fabrication processes.

Purpose of the Study:

  • To present a novel strategy for patterned cell adhesion using chemical surface modification.
  • To develop an engineered surface that promotes high-contrast protein adsorption and subsequent cell attachment.

Main Methods:

  • Utilized selective molecular-assembly patterning (SMAP) with an amine-terminated self-assembled monolayer to define cell adhesion areas.
  • Employed a protein-repellent poly(L-lysine)-graft-poly(ethylene glycol) (PLL-g-PEG) copolymer to create non-adhesive regions on silicon dioxide surfaces.

Related Experiment Videos

  • Characterized surface modifications using X-ray photoelectron spectroscopy, scanning ellipsometry, and fluorescence microscopy.

    • Main Results:

    • Demonstrated successful guided growth of primary neonatal rat cardiomyocytes for up to 4 days in vitro.
    • Showcased guided growth of the HL-1 cardiomyocyte cell line for up to 7 days in vitro.
    • Achieved high-resolution engineered surfaces through a simple, cost-effective dip-and-rinse process.

    Conclusions:

    • The developed SMAP technique offers a facile and efficient method for creating patterned surfaces for controlled cell adhesion.
    • This approach is suitable for integration with CMOS cell-based biosensors for extracellular electrical activity recording.
    • The method enables precise control over cardiomyocyte adhesion and growth, paving the way for improved biosensing platforms.